Trionychidae

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Trionychidae

[trī·ə′nik·ə‚dē]
(vertebrate zoology)
The soft-shelled turtles, a family of reptiles in the order Chelonia.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Trionychidae

 

a family of reptiles of the order Trionychoi-dae. Members of the family measure approximately 1 m in length and have three claws on each extremity. The plastron consists of several interlocking parts and does not unite with the carapace. The Trionychidae are the only turtles in which the reduced bony base of the shell is covered by soft skin, which enables them to supplement pulmonary respiration with cutaneous respiration.

There are seven genera with 22 species that inhabit the fresh waters of South and East Asia, New Guinea, Africa, and North America. In the USSR, the spiny soft-shelled turtle, whose shell measures approximately 30 cm long, is found in the Amur River basin. Trionychids are highly mobile predators.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
The Suzhou Zoo houses a male Yangtze giant softshell turtle. The other two live in Vietnam, but their genders are unknown.
The other two species of turtles, the midland smooth softshell turtle Apalone mutica and the Ouachita map turtle Graptemys ouachitensis, are species of large rivers (Ernst et al., 1994), and these habitats were not present on the base.
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As a result, spotted turtle and spiny softshell turtle populations in the province are isolated from one another, confined to tiny islands of threatened turtle habitat in a vast sea of developed land.
As its name implies, the spiny softshell turtle has a soft, flattened leathery shell.
Turtles are represented by remains of a large sea turtle of the modem genus Chelonia and a softshell turtle assigned to cf.
The influence of incubation temperature and family on eggs, embryos, and hatchlings of the smooth softshell turtle (Apalone mutica).
Other species are considered at risk in Canada but are found more commonly in the U.S., such as the sage grouse (Centrocercus urophasianus urophasianus), northern bobwhite (Colinus virginianus), burrowing owl (Speotyto cunicularia), eastern Massasauga rattlesnake (Sistrurus catenatus catenatus), and spiny softshell turtle (Apalone spinifera).
A short list of turtles that are in trouble to one degree or another would include the bog turtle, wood turtle, spotted turtle, Blanding's turtle, red-bellied turtle, eastern and ornate box turtles, Florida softshell turtle, alligator snapping turtle, various map turtles that live in single river systems in the South and the western pond turtle, one of the very few aquatic species found west of the Great Plains.
Conservationists have found 20 nests of the critically endangered Asian Giant Softshell Turtle, containing a total of 663 eggs, in Mekong River sandbars in Kratie province, the Wildlife Conservation Society announced on Wednesday.
Then I had an epiphany when I saw Pigface, a Nile softshell turtle, batting around a basketball at the National Zoo in Washington, D.C.