What genus does the turtle belong to? Genus Spiny turtles (Heosemys). Types of small turtles

(Chelonia), a group of reptiles, are the only representatives of reptiles whose body is covered with a shell. Found in all warm areas of the world. Several species are inhabitants of the seas and oceans, but mostly they are land and freshwater forms.

This group appeared in the Triassic ca. 200 million years ago. It is possible that turtles descended directly from cotylosaurs, the most primitive reptiles. Although there are few fossils to support this hypothesis, the extinct genus Eunotosaurus quite suitable for the role of an evolutionary “connecting link”. This animal had a flattened body and greatly expanded ribs.

Unlike their snake relatives, turtles were rarely worshiped and were never particularly feared. Indeed, they pose virtually no danger to human life. Perhaps a swimmer who finds himself too close to a male leatherback turtle ( Dermochelys coriacea), can be grabbed by its strong flippers and drowned. The fact is that in a state of strong sexual arousal, he is able to mistake any large object for a female.

Anatomy. The torso of turtles is enclosed in a shell, which also partially protects the head, neck and limbs. Its upper part, or carapace, covers the back and sides of the reptile, the lower, or plastron, covers the stomach. The shell is so strong that it can withstand 200 times the weight of the owner.

Typically, the inner layer of the shell is bone, and the outer layer is formed by hard horny tissue. Both layers consist of many elements tightly fitted to each other. The bone elements are called laminae, and the horny elements are called scutes. The greater strength of the shell is partly ensured by the fact that the boundaries between the internal plates and the outer scutes do not coincide.

As the turtle increases in size, horny substance grows along the edges of each scute. If growth is interrupted by periods of hibernation, growth rings are clearly visible on the scutes, allowing one to estimate the age of the individual.

The ribs are fused to the shell, so the chest is motionless. As a result, the turtle's breathing resembles the diaphragmatic breathing characteristic of humans and other mammals. Special muscles retract internal organs back, allowing the lungs to fill with air; then other muscles carry out the reverse process, compressing the lungs. Some aquatic species are not completely dependent on pulmonary respiration and are able to absorb oxygen also through the mucous membrane of the pharynx.

Differences between males and females (sexual dimorphism) are expressed differently depending on the species; sometimes they are completely invisible. A comparison of males and females of other species shows that the former have a longer and thicker tail, and the anus is located further from its base. This dimorphism is especially pronounced in huge sea turtles. Other sex differences concern the shape of the plastron, the color and size of the head, and the overall dimensions of the body.

Mating and egg laying. Mating behavior begins with courtship, the forms of which are species specific. The male may butt and push the female while gently biting her. In large turtles, courtship is sometimes accompanied by loud grunting. Male painted turtles ( Chrysemys picta) and decorated turtles ( Pseudemys) demonstrate tender feelings in a special way: swimming backwards and dragging the female along with them, they stroke or pat her on the face with the long claws of their front paws.

Mating can take place on land or in water. In this case, the penis, hidden at the base of the tail in a calm state, extends through the opening of the cloaca. Females of some turtle species can store viable sperm for a long time (this is also true of some other vertebrates), and one mating allows them to lay fertilized eggs over the next several years. However, their number decreases every year until a new portion of sperm is obtained.

Turtle eggs are oval or round, white or almost white. Females bury them in the ground to a depth not exceeding the length of their hind legs, or hide them in a pile of rotting plants. Most often these are well-lit places. Usually there is one clutch per year, but some sea turtles have as many as seven clutches in one breeding season. Depending on the type, eggs in a clutch range from one to 200.

Hatching. The period of incubation and hatching is the most dangerous in the life of turtles; at this time, numerous enemies feast on them delicious eggs and also soft-bodied cubs. Mammals dig up clutches, and seabirds grab newly hatched turtles as they rush along the shore to the water. Once in the water, the babies become prey for voracious fish. At this time, a large number of lovers of their eggs and young usually accumulate near the breeding grounds of turtles. Depending on the species, it takes different times for the shell to harden, but usually at least several months. After this, the turtles become relatively inaccessible to predators.

In nature, turtles grow quickly. There is a known example where, even in captivity, Galapagos elephant tortoises ( Geochelone elephantopus), starting at about 11 kg, they added the same amount annually until they weighed more than 100 kg. Many small species reach sexual maturity between the ages of 2 and 11 years.

Lifespan. No known vertebrate lives as long as turtles. Most of the information suggesting that their lifespan is slightly more than 50 years refers to individuals kept in captivity. Some species certainly live much longer. Carolina box turtle age ( Terrapene carolina), found in Rhode Island, was almost certainly 130 years old. The maximum period is considered to be approx. 150 years, but it is quite possible that the actual life expectancy of individual individuals is much longer.

Nutrition. Turtles in general can be called omnivores, although some species prefer plant food, others animal food, and still others eat everything. A strictly specialized diet is rare. Some aquatic turtles only feed underwater. Very young individuals require daily feeding, but this is not necessary for adults. In fact, once well fed, they can go months, and possibly years, without food.

Turtles have no teeth, and the sharp edges of their jaws are capable of biting food, but not chewing it. Tough, fibrous plants are difficult for turtles to handle, and animal meat sometimes has to be torn into pieces using the claws on the front paws. Some species have horny ridges inside the mouth, which allow them to crush prey protected by hard coverings.

Sense organs and higher nervous activity. Turtles are good at distinguishing odors at close range and, judging by some observations, use their sense of smell when choosing food. Vision is also well developed: these animals can be taught to recognize contours and colors. Both the shell and scaly skin have tactile sensitivity, and the giant tortoise even feels the pressure of a straw that is passed along its massive carapace. Although it has long been known that turtles are sensitive to vibrations transmitted through the soil, their ability to perceive airborne sound waves has long been controversial. Today the existence of at least weak “ordinary” hearing in them is considered proven.

Compared to other reptiles, turtles are very smart. They easily learn to follow their owner, seem to enjoy the attention they receive, and get used to a certain routine well. Apparently, some individuals are smarter than others. For example, among the six gophers Agassi ( Gopherus agassizi), living together, one individual climbed up the inclined plane onto the platform and rolled down the other side along a metal chute. She obviously enjoyed this activity and repeated it for hours on end. But in some situations, turtles are surprisingly slow-witted. For example, they may spend a lot of energy climbing over an obstacle that is not difficult to get around; or for a long time trying to squeeze through a gap much smaller than them.

MAIN FAMILIES More than 200 described modern species turtles. These are only the remnants of a huge number of species that existed during the Age of Reptiles, which lasted approximately 120 million years and ended ca. 70 million years ago. The species that have survived to this day are grouped into 12 families. The most famous of them are described below.

Cheloniidae(sea turtles). Five or six species of the family are large reptiles with limbs resembling oars or flippers. These are exclusively aquatic animals, coming ashore only to lay eggs or bask in the sun. It is very difficult for them to move on land. At least one species is found in all warm oceans.

Green (soup) turtle ( Chelonia mydas) the most famous of the sea turtles. It is spread all over to the globe, and it is from it that the famous turtle soup is prepared. Previously, these reptiles were essentially mercilessly exterminated, often killing the females just before laying eggs.

Dermochelyidae(leatherback turtles). Leatherback turtle ( Dermochelys coriacea) the only living species of this family. This giant can reach a mass of more than 680 kg with a front flipper span of 3.6 m. The leathery shell bears 7 longitudinal ridges on the dorsal side and 5 on the ventral side. Although the range of these turtles covers all warm oceans, they are the rarest of the widespread species. marine species squad. The question of the systematic position of the group remains controversial. It was allocated to a special suborder Athecae (scutellae), but most experts agree only on the rank of superfamily.

Trionychidae(three-clawed). These turtles are easily recognized by their soft, leathery shell without any scutes. They have a flat body, an elongated conical snout and legs with webbed swimmers. These are one of the fastest turtles, moving quickly both in water and on land. The long neck allows it to grab food and bite the enemy painfully, even if they are at a considerable distance. The claws of large individuals can leave deep scratches. Representatives of certain species tolerate captivity well, living in it for up to 20 years or more (record 25). Some three-clawed turtles are highly prized for their tasty meat. The largest of their 20 species is the large soft-shelled turtle ( Pelochelys bibroni) lives in Southeast Asia; its shell reaches a length of more than 1.2 m. Representatives of this family live in North America, Africa, Southeast Asia, the Malay Archipelago and New Guinea. Three species are found in the United States.

Pelomedusidae, Chelidae(suborder side-necked turtles: pelomedus and snake-necked). Representatives of these two families differ in the way the neck bends when the head is pulled under the edge of the shell: if in other turtles the neck bends in a vertical plane, then in them it bends in a horizontal plane, which is explained by the special structure of the spine. Side-necked live in Southern Hemisphere or nearby areas and are not found in North America, Europe and Asia. Both families unite approx. 50 types. The most bizarre of all turtles is the Matamata ( Chelus fimbriata) from South America belongs to the snake-necked species. Her head is covered with many outgrowths sticking out in different directions. The Australian snake-necked turtle ( Chelodina longicollis) the length of the thin neck is almost the same as the shell.

Chelydridae(snapping turtles). The family includes only 2 species, of which the best known is the snapping turtle ( Chelydra serpentina). It is an aquatic reptile native to much of North America and northwestern South America, abundant in southeastern Canada and the eastern half of the United States, where it is highly prized as a food item. Cayman turtles are unfairly blamed for destruction large quantity fish and waterfowl. The weight of these animals often reaches 13.6 kg. When pulled out of the water, they can bite painfully.

Another species, the snapping turtle ( Macrochelys temmincki) one of the giants of the order, reaching a mass of approx. 90 kg. Not only are they the heaviest of its freshwater species, but they are also the most water-bound of the North American turtles. They are found in the southeastern United States, mainly in the lower Mississippi. Being slow, the snapping turtle lures prey with the help of a fleshy outgrowth of the bottom of the mouth, which moves in its open mouth like a worm.

Kinosternidae(mud turtles). Turtles of this family, which includes 21 species, usually live at the bottom of rivers and lakes. The group's range extends from southeastern Canada through the central and eastern United States to South America. The eight species of mud turtles found in the United States have small, fleshy “whiskers” on their chins that help distinguish them from other members of the order.

The most famous representative of the family is the common musk turtle ( Sternotherus odoratus) is common in water bodies of the eastern United States. Its length does not exceed 13 cm, but it greatly annoys local fishermen, as it often gets hooked, and when it is picked up, it secretes a stinking secretion from the musk glands. In addition, she is warlike and bites painfully.

Trailing turtles (genus Kinosternon) are found almost exclusively in the southeastern United States. They avoid deep bodies of water and come to land from time to time. Range of the Pennsylvania turtle Kinosternon subrubrum) stretches from the southeast of the country along the Atlantic coast to the southwestern tip of Connecticut.

Testudinidae(land turtles). This family includes approx. 40 species of turtles found on every continent except Australia. It also includes the relatively small Mediterranean sea ​​turtle (Testudo graeca), and the giant elephant tortoise ( Geochelone elephantopus) from the Galapagos Islands, and some bizarre African species. Thus, in African kinix turtles (genus Kinixys) the back of the carapace is movably connected to the front, an elastic turtle ( Malacochersus tornieri) from Tanzania and Kenya has a soft, flattened shell made of thin bony plates and can hide in narrow rock crevices in a moment of danger. The only members of this family found in the United States are in the genus Gopher ( Gopherus); they live in the southern part of the country.

In the 19th century Galapagos elephant tortoises were taken on whaling ships as supplies of meat for sailors. The capture of millions of individuals has undermined the population so much that it is in danger of extinction.

Emydidae(freshwater turtles). Exactly this big family order, uniting more than a third of all its species. They are common to the northern continents, also found in northern South America and Africa and are very diverse in size and body shape.

Painted turtle ( Chrysemys picta), which is distributed throughout the United States, is one of the most famous members of the family. It often reaches high numbers even in small ponds. Box turtles ( Terrapene) also a widespread genus, but not found in the western United States. They are mostly land animals; the movable elements of the plastron enable them to tightly close all the openings of the shell, like flaps. Decorated turtles ( Pseudemys) inhabit the southeastern United States.

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Number of sources used in this article: . You will find a list of them at the bottom of the page.

If you have a turtle, it may be helpful to know what gender it is. However, unlike many mammals, turtles (which are not actually mammals) do not have external genitalia. This makes sex determination a more difficult task, but it can still be done. It will be easier for you to determine the sex of a turtle if you take two turtles of different sexes for comparison. If you only have one turtle, then you will need to study as much as possible more features male and female individuals to determine sex.

Look at the turtle's shell. Turtles' shells, or shells, differ slightly depending on the sex. The shell of an adult male has a more elongated shape compared to the shell of an adult female.

• When determining the sex of a turtle, this method can be quite limited because you must ensure that the turtle has reached sexual maturity. You may think it is a male, but in fact it turns out that the turtle has not yet reached sexual maturity.
• There may be differences in size between a large male and a small female, which may make it impossible to determine the sex, especially if you have one individual.

1. Examine the turtle's plastron. The plastron is the lower (ventral) part of the shell. To examine the plastron, carefully turn the turtle over so the plastron is facing up. They don't like to be upside down and may try to bite, so hold the turtle by the edges of its shell near its tail so it doesn't reach you. Carefully turn the turtle over and look at the plastron. The male's plastron is slightly concave (bends inward), while the female's is flat.

   • The concave plastron of the male turtle allows the animal to rest on the female during mating.
   • The flat shape of the female plastron is associated with the need to bear eggs.

2. Check to see if the turtle's tail has a notch. The male turtle has a V-shaped notch in the back of his shell. The notch for the tail is necessary for the turtles to mate. Otherwise, the tail may be pressed against the plastron.

   Look at the species features. Some types of turtles have characteristic sexual differences in color:

   • American Box Turtle: In 90% of cases, males have red or orange irises, while females have brown or yellow irises. Additionally, females have a taller, domed, rounded shell, while the male has a more flattened, oval or oblong-shaped shell.
   • Painted turtle: if the turtle's plastron of blue color, it is a male, and if the plastron is a color other than blue, then it is a female.

   Detailed Features

   1. Examine the turtle's claws. Male turtles use their claws when mating with females. They also use their claws to fight and defend their territory. Thus, the claws on the front paws of males tend to be longer than those of females. Again, this is more obvious when you have two turtles of different sexes to compare against each other.

      • The red swamp turtle has a pronounced difference between the claws of the male and female.

   2. Look at the turtle's cloaca. Males and females have a hole located at the bottom of the tail. It is called the cloaca; its location depends on gender.

      • The female's cloaca is rounder and star-shaped. It is located close to the body, almost under the shell.
      • The male's cloaca is longer and larger. It is located in the last third of the tail towards its tip.
   3. • To determine the sex of a turtle using this method, you must know the size of the tail of the male or female. Otherwise, this method may not be reliable.

   4. Combine multiple features to make a conclusion. You can fairly accurately determine the sex of a turtle if you evaluate all the characteristics described above and analyze them together. Keep in mind that some signs are less reliable than others for determining the sex of a turtle.

   • Drawings or photographs will help you analyze the cloaca. For this, for example, there is a very convenient and good book“Turtles. Contents, diseases and treatment” by D. Vasiliev.
   • There are many species of sea turtles (including Atlantic ridleys, Kemp's sea turtles, and others) that do not have external sexual characteristics. Talk to a marine veterinarian to find out what gender your turtle is.

   Warnings

   Sources

   Article information

   This article was co-authored by Pippa Elliott, MRCVS. Dr. Elliott, BVMS, MRCVS is a veterinarian with over 30 years of experience in veterinary surgery and the care of companion animals. She graduated from the University of Glasgow in 1987 with a degree in Veterinary Medicine and Surgery. He has been working at the same animal clinic in his hometown for over 20 years.

Mediterranean turtle, Testudo graeca (Linnaeus, 1758). In the past, an incorrect name, copied from a Latin zoonym, was also used - “Greek tortoise”. A medium-sized turtle with a high carapace and a maximum length of up to 30 cm. Forepaws with 5 claws. The carapace is yellowish-brown or light olive in color with dark spots. General range The species covers diverse, predominantly mountainous and foothill dry landscapes in northern Africa, southern Europe, southwest Asia, as well as on some islands in the Mediterranean Sea. By the way, this species is not found in Greece. On the territory of Russia it is found along the Black Sea coast of the Caucasus and in Dagestan. Intraspecific taxonomy has not been sufficiently studied. Currently, from 4 to 8 subspecies are distinguished, the status of some of them is debatable. They feed mainly on plant foods, but often eat invertebrates and carrion. They overwinter from late October to November in various underground shelters. They emerge from wintering in March–April. The mating period lasts from April to mid-June. A month and a half after mating, females lay eggs. The clutch contains from 1 to 7 eggs measuring 3.2–4.6×2.9–3.7 cm and weighing 19–23 g. The female makes up to 3 clutches per season. Incubation duration is from 60 to 110 days. Young turtles emerge from eggs from late July to mid-September, with a carapace length of 3.5–4.5 cm. Often from late clutches or when unfavorable conditions the turtles emerge to the surface only next spring. Sexual maturity is reached at 12–14 years of age with a carapace length of 16–18 cm. The number of the species is rapidly declining due to the transformation of natural habitats and long-term uncontrolled trapping. Thus, A. Schleyer wrote back in 1912 (p. 73): “All the turtles that can sometimes be seen on the windows of grocery stores in St. Petersburg and Moscow belong precisely to this species.” It is no longer found in some parts of its range. The species is listed in the Red Book of Russia, the International Red Book and Appendix II of the Convention on International Trade in Endangered Species of Wild Flora and Fauna (CITES).

Balkan turtle, Testudo hermanni(Gmelin, 1789). A land turtle with a carapace up to 20–23 cm long. Females are larger than males. The top of the shell is painted in gray or yellowish tones. The species is distributed in southern Europe: southeastern Spain, southern France, central and southern Italy, Herzegovina, Montenegro, Serbia, Macedonia, Albania, Greece, Romania and Bulgaria. Also found on many large islands Mediterranean Sea. Intraspecific taxonomy cannot be considered final, but this moment There are 2 subspecies. Nominative subspecies T.h. hermanni distributed over most of its range, and the eastern Balkan tortoise, T.h. boettgeri inhabits the Balkan Peninsula. Mainly adheres to evergreen dry forests in the foothills and low mountains. It feeds mainly on plant foods, but also eats small invertebrates and picks up fallen fruits. Hibernates in winter and during summer drought. It emerges from wintering in March–April, and the first matings are observed 1–3 weeks after the end of diapause. From April to June, females lay from 3 to 12 eggs measuring 3.0x2.4 cm. Repeated clutches are noted. The duration of incubation varies depending on temperature and humidity from 53 to 120 days. They reach sexual maturity at the age of 5–11 years, females later than males. The main reasons for the decline in the number of Balkan turtles are the destruction of forests due to logging and fires, as well as uncontrolled fishing for commercial purposes. Currently, Balkan tortoises are protected by a number of national legislations, and special reserves have been created in France. Successfully divorced in artificial conditions. The species is listed in the IUCN Red List, Appendix II of the Convention on International Trade in Endangered Species of Wild Flora and Fauna (CITES) and Appendix II of the Berne Convention.

Turtles are very ancient creatures. To some extent, they are descendants of some species of dinosaurs.

There are a huge variety of turtles. They are divided into species, subspecies, orders, suborders. Many are already extinct, and some are on the verge of extinction. Some turtles can be kept in the house, but some are simply not meant for this.

Today we will try to understand all the diversity and types of turtles.

There are a huge variety of turtle species. In total there are more than 328 species, which are included in 14 families.

The tortoise order consists of two suborders, divided by the way the animal retracts its head into its shell:

1. Hidden-necked turtles with necks folded into an "S" shape
2. Side-necked turtles with their head tucked toward one of their front legs

This is the simplest division. I will not give an official division into all types and subspecies here. For this we can read Wikipedia. The purpose of this article is not to confuse you, but to give the most convenient and simple classification. Therefore, we will divide turtles by habitat.

According to the habitat of turtles, there is the following classification:

• Sea turtles (live in seas and oceans)
• Terrestrial turtles (live on land or in fresh water bodies)

In turn, terrestrial turtles last for:

• Land turtles
• Freshwater turtles

Types of sea turtles

Sea turtles are inhabitants of salt waters. Unlike their earthly relatives they differ large size. They live in warm tropical waters, practically never visiting cold latitudes.

Sea turtles have remained virtually unchanged for millions of years since they appeared on the planet. They are characterized by developed forelimbs, used as flippers, and hind legs that are almost not involved in movement. Also, in sea turtles, the limbs cannot be retracted into the shell. Moreover, some species, such as the leatherback turtle, have no shell at all.

Despite the popular belief that turtles are slow animals, this is only the case on land, where they really look clumsy. However, in the water they are transformed, becoming examples of speed and superior navigator qualities. Even in Fiji (a state in Pacific Ocean) the sea turtle is the symbol of the maritime department. This is no accident - nature really rewarded these animals with qualities that allowed them to become excellent swimmers.

In addition, scientists have not fully figured out why, but turtles have amazing navigational abilities:

• Firstly, they accurately determine the place of their birth, and return exactly there to continue their offspring. And even after many years they remember the place of their birth.
• Secondly, sea turtles undergo enormous migrations, presumably guided by magnetic field Earth, which prevents them from getting lost.
• And thirdly, some sea turtles, for example, the Ridley turtle, gather to lay eggs in the sand only on one day a year. Scientists suggest that only those individuals that were born in this particular place and were lucky enough to survive gather on the beach. Locals call this day "invasion" when thousands of turtles emerge from the water. This behavior suggests collective consciousness turtles.

When the turtle lays her eggs, she very carefully buries the eggs with sand, compacts it, and makes it invisible. Looking at such care for the eggs, it is difficult to imagine that the mother turtle does not experience any maternal feelings, and having done her job, returns to the ocean without waiting for the eggs to hatch.

The hatched turtle will likely live less than 10 minutes. Having got out of the sand, she rushes to the water, on the way to which a huge number of enemies, primarily birds of prey, await her. But even when they reach water, most of them will be eaten by sea predators. Only one in a hundred turtles born will reach adulthood and return to this beach to continue their lineage.

Based on materials from: inokean.ru

The most famous representatives of sea turtles:

• Leatherback turtle
• Green (soup sea turtle)
• Loggerhead sea turtle (false carriage turtle)
• Hawksbill sea turtle (true caretta)
• ridley (olive turtle)

Types of land turtles

Terrestrial turtles make up the largest large group by the number of species included in it. This includes the family land turtles, which has 37 species, as well as the two largest families of freshwater turtles (85 species).

Terrestrial turtles also include many families, including 1-2 species.

Spread throughout the roast and temperate zone(except Australia). Swamp turtles live in the steppe zone of Russia and the Caucasus.
Includes 5–7 species inhabiting the Mediterranean, the Balkan Peninsula, the Caucasus, Asia Minor and Central Asia.

Terrestrial turtles are herbivores. This is one of the few examples of the development of only plant foods among turtles. Their food is green grass and vegetation, with which they receive the necessary portion of water. In the habitats of many species, food and water are available only for short periods.

In such places, turtles spend most of their lives hibernating. Thanks to this slow metabolism, the life expectancy of turtles is very long, up to 100 - 150 years.

The most famous representatives of land turtles:

• Galapagos elephant tortoise
• Elastic turtle
• Steppe tortoise
• Elephant turtle
• Wood turtle

Types of land turtles

Land turtles, like freshwater turtles, belong to the species of terrestrial turtles.

Let's start with the land ones - a family of turtles with 11-13 genera, including about forty species.

Land animals with a high, less often flattened, shell, with thick columnar legs. The toes are fused together, and only the short claws remain free. The head and legs are covered with scutes and scales.

Among land turtles there are both small species, about 12 cm long, and giant ones, up to a meter or more in length. Gigantic species live only on a few islands (Galapagos, Seychelles, etc.). Specimens are known that have reached about 400 kg of live weight in captivity.

Compared to freshwater turtles, land turtles are very slow and clumsy, so in case of danger they do not try to escape, but hide in their shells. Another method of defense used by many land turtles is the sudden emptying of a very capacious bladder. When in danger, the Central Asian turtle hisses like a viper.

They are distinguished by phenomenal vitality and longevity. Life expectancy in different species ranges from 50 to 100 years, sometimes up to 150.

Land turtles are primarily herbivores, but their diet must include a certain amount of animal food. They can go for a very long time without water and food, and in the presence of succulent vegetation they do not need water at all, but they drink it willingly, especially in the heat.

The most popular are the Central Asian and Mediterranean turtles. It's better to take a young turtle. This can be easily determined by the size of the shell (it is small) and behavior (reaction, better in young turtles).

Based on materials from: so-sha.narod.ru

The most famous representatives of land turtles:

• Panther turtle
• Yellow-footed turtle
• Yellow-headed turtle
• Red footed turtle
• Radiant turtle
• Steppe (Central Asian) turtle
• Mediterranean (Caucasian, Greek)

Types of freshwater turtles

Freshwater turtles are the largest family of turtles, comprising 31 genera and 85 species. These are small and medium-sized animals, the shell of which in most cases is low and has a rounded oval streamlined shape.

Their limbs are usually swimming, have more or less developed membranes and are armed with sharp claws. The head is covered on top with smooth skin, only sometimes there are small shields on the back of the head. Many species have very bright, beautiful colors of the head and legs, and often the shell.

The family is distributed unusually widely - in Asia, Europe, North Africa, North and South America. There are two main nodes in their geography. The main, most ancient center lies in Southeast Asia, where more than 20 genera are concentrated; the second center apparently formed later in eastern North America, where 8 genera of freshwater turtles are found.

Most species are aquatic inhabitants, inhabiting bodies of water with weak currents. They move deftly both in water and on land, and feed on a variety of animal and plant foods. Only a few species switched to living on land for the second time, which affected their appearance and behavior. Although carnivory is characteristic of aquatic turtles, some species are strict vegetarians.

Just like land animals, they should be kept in terrariums, but only in special ones. You need a heated lamp, a “bank” where the turtle should go out to warm up, and actual water.

Trionics is a representative of the family of soft-bodied turtles.

It inhabits the Amur basin within Russia (which is the extreme northern limit of its range) almost from the mouth and south to the western part of Primorye, Eastern China, North Korea, Japan, as well as Hainan Island, Taiwan. Introduced to Hawaii.

Lives in fresh water bodies. Most active at dusk and at night. During the day it often basks on the shore. In case of danger, it instantly disappears into the water, burying itself in the bottom silt. It feeds on fish, amphibians, insects, mollusks and worms.

Also, red-eared turtles are very popular. Representatives of the genus can be found south of North America, Southern and Central Europe, South Africa, and Southeast Asia.

The turtle got its name from the two elongated bright red spots behind its eyes. This spot may be bright yellow in the Cumberland turtle subspecies or yellow in the yellow-bellied turtle subspecies. The plastron is oval, usually dark in color with yellow lines and a yellow edging around the edge.

The most famous representatives of freshwater turtles:

• Side-necked turtle

Unofficial division of turtles

These divisions are not included in the official ones, but I believe that it is worth dividing them according to these criteria to make your choice easier.

Types of pet turtles

Here again we will divide for convenience into land and freshwater turtles.

Land pet turtles

The most common type of turtle. Those turtles that we are used to seeing among our friends, acquaintances, and relatives. Moves slowly and a little awkwardly, waddling.

By the way, it is officially listed in the Red Book and prohibited for sale. But, as we see, most pet stores circumvent this ban.

In nature, it lives in southern, warm regions, in agricultural and desert areas. Central Asia. The sizes are medium, the shell is 20-30 centimeters long, yellow-brown in color with dark zones on the scutes. The limbs have four fingers.

The most comfortable temperature for keeping in a terrarium is 24-30 degrees. However, being in a closed space has a detrimental effect on the health and psychological state of the animal, and it dies early. It’s not for nothing that the Central Asian turtle was included in the Red Book!

This breed has about 20 subspecies, living in various landscapes and climatic zones. Basically it's North Africa, southern Europe and South-West Asia, the Black Sea coast of the Caucasus, Dagestan, Georgia, Armenia, Azerbaijan.

Accordingly, it loves warmth and sunlight. Depending on the subspecies, it has different sizes and colors of the shell. The dimensions of the shell reach up to 35 centimeters. Color – brown-yellow with dark splashes. On the back of the thighs there is a horny tubercle. There are 5 toes on the front paws, and spurs on the hind paws. Comfortable temperature for keeping in an aquarium – 25-30 degrees.

They are similar in appearance to Mediterranean turtles, but much smaller. The dimensions of the shell are 15-20 centimeters (according to some sources – 30 centimeters). The color of the shell is yellow-brown with black spots. At a young age it is bright, but fades over the years.

A characteristic feature of this species is the conical spike at the end of the tail. Individuals living in the west are smaller than individuals living in the east.

At all, this type lives in Southern Europe, along the Mediterranean coast: northeastern Spain, European part Turkey, Bulgaria, Romania, Balearic Islands, Corsica, Ligurian and Tyrrhenian coasts of Italy, Sardinia, Sicily, as well greek islands. Comfortable temperature for keeping in a terrarium is 26-32 degrees.

These turtles are very small. Their shell size is only about 12 centimeters. Yellow in color, shields with a dark border. There are no spurs on the hind legs.

Habitat: Mediterranean coast of Israel, Egypt, Libya. If you decide to get such a turtle, then remember that the temperature in the terrarium should be about 24-30 degrees. Feature behavior of the Egyptian tortoise - like an ostrich, it quickly buries itself in the sand when danger approaches.

Freshwater pet turtles

The most common species of freshwater turtles, which can be found in terrariums and aquariums of urban residents. It includes approximately 15 subspecies and belongs to the genus of decorated (lined, painted) turtles. They call it this because of its main distinguishing feature - a red spot near the ears (yellow in some subspecies).

The shell is 18-30 centimeters long. In youth it has a bright green shell color, which darkens with age. There are bright green stripes on the head and limbs. Males differ from females in their larger and more massive tail and nail plate.

They live naturally in the USA (Virginia, Florida, Kansas, Oklahoma, New Mexico), Mexico and the countries of Central America and the Caribbean, and South America (Colombia, Venezuela).

Can also be found in Australia, South Africa, Arizona, Guadeloupe, Israel, Spain, and Great Britain. Lives in lakes and ponds with marshy shores. Leads a sedentary and lazy lifestyle. For comfortable stay in your terrarium, maintain the water temperature 22-28 degrees, air temperature – 30-32 degrees.

There are 13 subspecies of the European marsh turtle. Their carapace is low, convex, and smooth. They reach a length of up to 35 centimeters and a weight of up to one and a half kilograms.

The carapace is dark green or dark olive in color, the plastron is light. Small spots on the head, neck, shell and paws (yellow specks). The claws on the paws are quite large, and there are membranes between the toes. In adult turtles, the length of the tail is up to ¾ the size of the shell, and in small turtles it is even longer!

You can meet the European marsh turtle in Russia (Crimea, Yaroslavl region, Smolensk, Bryansk, Tula, Oryol, Belgorod, Lipetsk, Voronezh, Samara, Saratov regions, upper Don, Mari El Republic, Trans-Urals, central and southern regions), Belarus, Lithuania, Ukraine, Central and Southern Europe, the Caucasus, Turkmenistan, Kazakhstan, Moldova, Armenia, Azerbaijan, Georgia, Asia, Turkey, northern Iran and northwest Africa.

In its natural habitat it prefers ponds and lakes with muddy bottoms. Activity occurs during the daytime. The water temperature in the terrarium is 22-25 degrees, the air temperature is 30. The species is listed in the Red Book.

Reaches a total length of up to 30 centimeters (25 centimeters of which is the shell). The carapace is flat, oval, brown-green in color with yellow stripes. There are also stripes on the paws and on the head. You can distinguish a male from a female by the tail (in females it is shorter and thinner), and by the concave carapace of the male.

Caspian turtles live in southern Europe (Montenegro, Croatia, Albania, Macedonia, Greece, Bulgaria, Cyprus), western Asia, in the north-west of the Arabian Peninsula (Lebanon, Israel, Saudi Arabia), in the Caucasus, Turkmenistan, Iran, Iraq.

In nature, it settles in bodies of water, both fresh and brackish water, near which there is coastal vegetation. And these turtles can climb mountains to heights of up to 1800 meters above sea level and live up to 30 years! In captivity, the air temperature in the terrarium is 30-32 degrees, the water temperature is 18-22 degrees.

Chinese trionix (Far Eastern tortoise). There are exceptions to any rule. Chinese Trionix is ​​proof of this. We are all used to seeing turtles with a classic hard shell. The Chinese Trionix is ​​soft.

The dimensions of the shell reach 20 centimeters, it is soft, leathery, without any scutes. Green color. But this is not all that can surprise an unprepared person in this unique representative of the turtle order.

They have three toes on their paws. On the face instead of a nose there is a proboscis. And if you pass by some pond somewhere in China and see such a proboscis sticking out of the water, you know that this is a Trionix turtle sticking out to get a fresh portion of oxygen.

Despite all their vulnerability and cuteness, the jaws of the Chinese trionyx have sharp cutting edges with which they grab their prey.

The amazing qualities of this turtle also include its speed of movement and reaction. This is not your classic turtle, barely moving around the house.

It is dangerous for humans due to its nature: Trionics turtles are quite aggressive, bite painfully and are rarely tamed. Unless they are raised in captivity from a young age. You can meet Trionix in China, Vietnam, Korea, Japan, on the islands of Hainan and Taiwan, in Russian Far East, Thailand, Malaysia, Singapore, Indonesia, Hawaiian and Mariana Islands, Micronesia.

They prefer to live in rivers with weak currents, lakes and canals. IN eastern countries– China, Japan, Korea is highly valued for its meat, and is served as a delicacy. In captivity, the water temperature in the terrarium should reach 26 degrees, the air temperature - 30-32.

Based on materials from: gerbils.ru

Types of aquarium turtles

You can look at aquarium turtles in a photo or in their natural form in a store, and choose a pet based on your aesthetic preferences. There are no big differences in the content of different breeds of such amphibians.

Types of aquarium turtles that are most often found in aquaterrariums:

• Swamp turtle
• Long-necked turtle
• Mud turtle

The last one is the smallest. An adult reaches only 10 centimeters. Accordingly, she will need a comparatively smaller home. The rest grow 2-3 times larger at home. All these amphibians have good eyesight, react to movement, and distinguish smells and tastes. At the same time, turtles are somewhat deaf, their ears are covered with folds of skin.

Keeping turtles in aquariums

When thinking about how to care for aquarium turtles, you should consider that they need both water and dry land to live a full life. Well, it’s not for nothing that biologists called them amphibians! The minimum dimensions of an aquaterratium should be 160 centimeters in length, 60 centimeters in width and 80 centimeters in height. For a musk turtle, these dimensions can be halved.

Caring for an aquarium turtle will require the arrangement of three zones: a pond, land and “shallow water”. Dry land should occupy up to a third of the area of ​​the aquaterrarium. Cute amphibians climb onto it to warm themselves. The shallow water area (depth 3-4 centimeters) may be quite small, but it is definitely necessary. Turtles use it for thermoregulation.

Based on materials from: akvarym.com

Types of small turtles

The little turtle will be an ideal pet for those who are short on time.

Little turtles are very popular exotic pets. All over the world, millions of people choose these cute, funny animals that do not require complex care and maintenance as pets.

Advantages of small turtles over other pets

The little turtle is ideal for both small city apartments and spacious private houses. Small, leisurely, requiring virtually no care and very unusual in appearance, turtles will become loyal friends to both restless children and calm elderly people.

If you don’t have the time or desire to walk your dog three times a day in any weather, brush your cat every week, or spend a whole day every month cleaning an aquarium with fish, purchasing a turtle would be an ideal option.

For small turtles, a 100-liter aquarium or a terrarium prepared with your own hands from a large box or old suitcase (if the turtle is an amphibian) is quite enough.

Which turtles are small

Small turtles include species of turtles that do not grow in length by more than 12-13 cm. Turtles with a body length exceeding 13-15 cm are considered large and require more complex care and maintenance conditions. There are several species of small turtles.

Flat-bodied (flat) turtles. The body length of representatives of this species varies between 6-8.5 cm, weight reaches 100-170 g. Such miniature sizes allow the turtle to feel comfortable in a small aquarium, and the fact that these turtles feed mainly on small succulents (plants containing a lot of moisture), makes caring for them very simple.

Locking turtles. Locked turtles live naturally in parts of Africa, as well as in Mexico and the United States. There are four subspecies of reclusive turtles. Yellow snapback turtles and Sonoran snapback turtles typically grow to 7.5-13 cm. Striped snapback turtles and reddish mud turtles reach 7.5-11 cm.

Musk turtles. Another type of small turtles that can be kept at home. Adults reach a maximum length of 15 cm. The genus of musk turtles has four species. The keeled musk turtle reaches 7.5-15 cm in length. The common musk turtle and the small musk turtle grow to 7.5-12.5 cm. Sternotherus depressus is 7.5-11 cm long.

Spotted turtles. This is a semi-aquatic species of turtles reaching 7.5-13 cm in length. Since this turtle is a semi-terrestrial animal, in addition to a small water aquarium, a dry aquarium or terrarium is perfect for it.

Chinese three-keeled turtles. The average body length of representatives of this species of turtle is 13 cm. The three-keeled turtle is an excellent choice for people who are purchasing a turtle for the first time, as it is a very calm and unpretentious animal.

Small turtles do not require large expenses for their maintenance, do not need any special care and do not take up much space in the apartment - a small 100-150-liter aquarium will be quite enough for them.

Despite the enormous popularity of these small exotic animals as pets, keeping them in captivity is illegal in some countries.

Based on materials from: vitaportal.ru

Endangered turtle species

At the moment, there are several species of turtles that are either extinct or on the verge of extinction.

Galapagos tortoise or elephant tortoise. By the early 20th century, more than 200,000 Galapagos tortoises had been exterminated. Almost all natural habitats of elephant turtles were also destroyed.

This is due to the fact that actively began to develop Agriculture and there was a need for places to raise livestock. Many types of livestock were also introduced, which competed with turtles for food.

Since the early 20th century, much effort has been made to restore the elephant turtle population. Captive-bred turtles were released into their natural habitats. Today the number of such turtles is more than 20,000 individuals.

Leatherback turtle. About 30 years ago, there were more than 117 thousand females of such turtles. Now their number has decreased to about 25 thousand.
This is due to the fact that leatherback turtles feed on jellyfish and dive to very great depths for them. In their natural habitats, water bodies are heavily clogged and turtles very often swallow various debris and die from this.

Swamp turtle. The only representative of turtles in Belarus. Females differ more large sizes body and a relatively thinner tail at the base.

Protected in many European countries. The species is listed in the Red Books of Belarus and many other CIS countries.

The decline in turtle numbers in Belarus is associated with the transformation and reduction in the area of ​​natural habitats that followed changes in natural landscapes and drainage of wetlands.

Far Eastern turtle. In most of its habitat, the Far Eastern tortoise is a common species. But in Russia, this rare view, whose numbers are rapidly declining in this part of its range.

This is due to the fact that the Far Eastern tortoise is one of the main edible species turtles. Therefore, many poachers catch, kill and sell them. Local residents also destroy the nests and take away the eggs of Far Eastern turtles.

Poisonous turtles

Along with pet turtles, there are some species that can cause irreparable harm to your health.

Leatherback turtle. The leatherback turtle is the largest of all turtles, sometimes reaching over 2.5 meters in length. These 2,000-pound omnivores are arguably the widest-growing vertebrates on Earth, but their populations are declining every year due to industrial development, pollution and being caught as bycatch.

These turtles are usually quite gentle giants, however if disturbed they can bite and their bite can break bones as they are very strong and powerful. In one strange case, a huge leatherback turtle, likely weighing more than 680 kilograms, directed its aggression towards a small boat and rammed it. Shortly before, the turtle was being chased by a shark, so it considered the boat a potential threat.

Fringed turtle (mata-mata). The Amazon of South America is famous for its incredible and sometimes creepy creatures. In the same river as piranhas and river dolphins lives a bizarre fringed turtle.

What will happen if a person steps on a fringed turtle is unknown, but this strange river reptile has an elongated, snake-like neck and a strange mouth containing two sharp plates that resemble human teeth fused together. This uniquely creepy carnivore's lunch menu includes waterbirds, fish and other reptiles.

We can only imagine what will happen to a person who reaches out from the boat to touch the strange lump visible from the water...

Big-headed turtle. The big-headed turtle is a bizarre-looking creature with a long, snake-like tail that is almost equal to length her body. This turtle is endemic to Southeast Asia, where it hunts a variety of prey in rivers.

The large head does not retract into the shell, and is equipped with very powerful jaws. If a turtle feels threatened, it will not hesitate to use its beak, which can crush bones, so it is better to keep your distance from them. Incredibly, this creature, living in Asia, is able to climb trees, where it can sit like a bird. Unfortunately, this amazing creature is endangered due to poaching, which must be constantly combated.

Soft-bodied turtles. Looking like flattened human-reptile hybrids from alien horror films, soft-bodied turtles compensate for their lack of shell with a very strong bite. Among the many species of soft-shelled turtles from around the world, the most feared is the large Cantor's soft-shelled turtle, endemic to China.

She hides in the sand, waiting for prey, and then jumps out and bites the prey with sharp teeth. The turtle's sheer size and the force of its bite can cause horrific injuries. However, this species is unfortunately currently endangered. However, more common species of softshell turtles, such as the evil trionix, can be found throughout the world and are quite capable of biting an unwary fisherman.

Based on materials: bugaga.ru

I hope you received today Full description what types of turtles there are. We figured out all their diversity and have already planned a pet for the future. Well, I say goodbye to you.

Kawabanga, friends!