Kinosternidae | |
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Common musk turtle, Sternotherus odoratus | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Reptilia |
Order: | Testudines |
Suborder: | Cryptodira |
Superfamily: | Kinosternoidea |
Family: | Kinosternidae Agassiz, 1857 [1] |
Genera | |
Synonyms [1] | |
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The Kinosternidae are a family of mostly small turtles that includes the mud turtles and musk turtles. The family contains 25 species within four genera, but taxonomic reclassification is an ongoing process, so many sources vary on the exact numbers of species and subspecies. They inhabit slow-moving bodies of water, often with soft, muddy bottoms and abundant vegetation.
Most kinosternids are small turtles, 10–15 cm (3.9–5.9 in) in carapace length. The highly domed carapace has a distinct keel down its center. The genus Staurotypus gets much larger, to 30 cm (12 in). Females are generally larger than males, but males have much longer tails. Kinosternids can be black, brown, green, or yellowish in color. Most species do not have shell markings, but some species have radiating black markings on each carapace scute. Some species have distinctive yellow striping along the sides of the head and neck.
The musk turtles are so named because they are capable of releasing a foul-smelling musk from glands under the rear of their shells when disturbed. They are native to North America and South America.
All members of the family are carnivorous, feeding on crustaceans, aquatic insects, mollusks, annelids, amphibians, small fish, and sometimes carrion. They also eat vegetation such as aquatic plants. In captivity they can eat red and green leaf lettuce.
Kinosternids lay about four hard-shelled eggs during the late spring and early summer. After hatching, some species overwinter in a subterranean nest, emerging the following spring. Some adults also spend the winter on land, constructing a burrow with a small air hole used on warm days.
Kinosternids contain the only species of turtle known, or at least suspected, to exhibit parental care. Studies of the yellow mud turtle in Nebraska, United States, suggest females sometimes stay with the nest and may urinate on the eggs long after laying, to either keep them moist or to protect them from snake predation (by making them less palatable).[ citation needed ]
Some kinosternids, particularly those in the genera Claudius and Staurotypus , exhibit genetic sex determination; in Staurotypus this is XY sex determination, and the same is suspected to be true of Claudius as well. Kinosternon and Sternotherus have temperature-dependent sex determination as is typical of turtles. [2] [3]
Family Kinosternidae
Kinosternon is a genus of small aquatic turtles from the Americas known commonly as mud turtles.
Kinosternoidea is a superfamily of aquatic turtles, which includes two families: Dermatemydidae, and Kinosternidae.
Sternotherus is a genus of turtles in the family Kinosternidae including six species commonly known as musk turtles. The genus is endemic to North America, occurring in the eastern third of the US and southeast Ontario, Canada. Musk glands positioned near the bridge of the shell can produce foul smelling secretions when the turtles are threatened, although gentle handling does not normally provoke a response. Sternotherus are moderately small turtles, with the largest species in the genus, the razor-backed musk turtle, attaining a maximum of 17.6 cm. in shell length. The carapace is characteristically oval and domed, with most species having one or three keels on the back which may become smoother and obscure with age in some species. Musk turtles are generally drab in color, mostly black, gray, brown, olive, or ocher, which aid in camouflaging them in their natural habitats. The head is relatively large and stout, marked with spots, streaks, or strips. The plastron has only 10 or 11 scutes, as opposed to 12, a more common condition in North American turtles. The tail is short, with males having a horny claw like tip.
Staurotypus is a genus of aquatic turtles, commonly known as giant musk turtles, Mexican musk turtles, or three-keeled musk turtles, in the family Kinosternidae. The genus contains two recognized species, which are endemic to Mexico and Central America. Both species are sold and bred as pets.
Sternotherus odoratus is a species of small turtle in the family Kinosternidae. The species is native to southeastern Canada and much of the Eastern United States. It is also known commonly as the common musk turtle, eastern musk turtle, or stinkpot turtle due to its ability to release a foul musky odor from scent glands on the edge of its shell, possibly to deter predation. This turtle is grouped in the same family as mud turtles.
The razor-backed musk turtle is a species of turtle in the family Kinosternidae. The species is native to the southern United States. There are no subspecies that are recognized as being valid.
The narrow-bridged musk turtle is a species of turtle in the family Kinosternidae. The species is found in Central America and Mexico.
Dunn's mud turtle, also known commonly as the Colombian mud turtle, is a species of turtle in the family Kinosternidae.
The Sonora mud turtle, also known as the Sonoyta mud turtle, is a species of turtle in the Kinosternidae family. It is found in Mexico and the United States. The Sonoran mud turtle species is heavily influenced by its environment. Depending on the amount of water available due to fixed water sources or rainfall, is how tolerant the mud turtle is to drought. The species' drought tolerance is extremely variable, depending on its environment.
The giant musk turtle, also known commonly as the Chiapas giant musk turtle or the Mexican giant musk turtle, is a species of turtle in the family Kinosternidae. The species is found in Central America.
The eastern mud turtle or common mud turtle is a common species of turtle in the family Kinosternidae. The species is endemic to the United States. There are two recognized subspecies.
The striped mud turtle is a species of turtle in the family Kinosternidae. The species is native to the southeastern United States.
The Florida mud turtle is a species of turtle in the family Kinosternidae. The species is endemic to the state of Florida in the United States. This species of turtle is extremely rare compared to others.
The Alamos mud turtle is a species of mud turtle in the family Kinosternidae. It is endemic to Mexico, where it occurs in the states of Sinaloa and Sonora.
The Arizona mud turtle is a species of mud turtle in the family Kinosternidae found in the deserts of Arizona and Sonora (Mexico). It is a semi-aquatic turtle. It lives in impermanent puddles, and avoids permanent rivers and lakes.
Herrera's mud turtle is a species of mud turtle in the family Kinosternidae. The species is endemic to Mexico.
The rough-footed mud turtle is a species of mud turtle in the family Kinosternidae. The species is endemic to the southwestern United States and northern Mexico.
The white-lipped mud turtle is a species of mud turtle in the family Kinosternidae. The species is endemic to Central America and northwestern South America.
The scorpion mud turtle or Tabasco mud turtle is a species of mud turtle in the family Kinosternidae. It is found in Mexico, Central and South America. It is a medium to large kinosternid with a domed, oval upper shell 92–270 mm (3.6–10.6 in) long. Males regularly exceed 200 mm. The scorpion mud turtle is a highly aquatic, adaptable kinosternid that will live in almost any body of water. It is primarily omnicarnivorous, a glutton, and feeds on a wide variety of aquatic invertebrates and vertebrates, as well as carrion and bird eggshells. It also feeds on plant material such as algae, fruits, flowers, nuts, seeds and aquatic plants. In captivity, poorly fed K. scorpioides can be cannibalistic, biting off the toes and limbs of conspecifics. Females probably lay 1 to 6 hard-shelled eggs. Like many kinosternids, they probably construct a shallow terrestrial nest with little cover.