Trionychidae


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Related to Trionychidae: Spiny Softshell Turtle

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 It might be outdated or ideologically biased.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 ?
Species Common Local name English name Testundinidae Manouria emys (d) Asian brown Baning tortoise Bataguridae Siebenrockiella crassicollis Black marsh Kura-kura turtle jaung Cuora amboinensis Asian box Kura-kura turtle tambit Cyclemsys dentata Asian leaf/stream Kura-kura turtle air Heosemsys spinosa Spiny turtle Kura-kura umung Malayemsys subtrijuga Ricefield/Snail eating turtle Orlitia borneensis Malaysian Giant Biuku turtle Pyxidea mouhottii Keeled box turtle Trionychidae Amyda Asian Labi-labi cartilagenea softshelled sungai turtle Dogania Malayan Labi-labi subplana softshelled hitam turtle Pelochelys Asian giant Labi-labi bibroni softshelled kuning turtle Species IUCN RDBk (a) Testundinidae Manouria emys (d) VU A1acd, B1+2acd CITES App.
Remarks: This bony plate, which measures 31.4 mm in its greatest length, has a sculpturing pattern that is typical in many genera of the subfamily Trionychinae of the softshell turtle family Trionychidae. The pattern consists of rounded pits with somewhat raised borders, with the pits being sometimes linked and some times isolated, and with its pit borders occasionally open (Hay 1908, plate 86) as in Trionyx (Amyda in Hay 1908).
Turtles are represented by a suprapygal of a large sea turtle, probably of the modem green sea turtle genus Chelonia, and a softshell turtle of the modem family Trionychidae with a bony shell pattern of linked, rounded pits such as are found in modem genera in the family.