Kinosternidae

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{{Taxobox | color = pink | name = Kinosternidae | image = Sternotherus_odoratus.jpg | image_size = 240px | image_caption = Common Musk Turtle, Sternotherus odoratus | regnum = Animalia | phylum = Chordata | classis = Reptilia | subclassis = Anapsida | ordo = Testudines | subordo = Cryptodira | superfamilia = Kinosternoidea | familia = Kinosternidae | familia_authority = Agassiz, 1857 | subdivision_ranks = Genera | subdivision = Kinosternon
Sternotherus
Claudius (genus)
Staurotypus
}}

Kinosternidae is a family of mostly small turtles that includes the mud and musk turtles. The family Kinosternidae contains 25 species within 4 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 bottoms and abundant vegetation.

Contents

Description

Most kinosternids are small turtles, between 4 and 6 inches with a heavily domed shell that has a distinct keel down its center. The genus Staurotypus gets much larger, to 12". Females are generally larger than males, but males have a much longer tail. They can be 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 their head.

The musk turtles are so named because they are capable of releasing a foul smelling musk when disturbed. They are native to North and South America.

Diet

All members of the family are carnivores, feeding on crustaceans, aquatic insects, mollusks, annelids, amphibians, small fish, and sometimes carrion.

Reproduction

Kinosternids lay approximately four hard-shelled eggs during the late spring and early summer. After hatching, some species overwinter in the subterranean nest, emerging the following spring. Some adults also spend the winter on land, constructing a burrow with a small air hole that is 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, USA, 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).

Taxonomy

Family Kinosternidae
Subfamily Kinosterninae

Image:Kinosternon subrubrum.jpg

Image:Sternotherus carinatus.jpg

Subfamily Staurotypinae

References

fr:Kinosternidae lt:Muskusiniai vėžliai nl:Modderschildpadden pl:Żółwie piżmowe