...Shauna C. Edgar; Don B. Brinkman; Michael J. Ryan; David C. Evans The pre-Campanian trionychid fossil record in North America is composed of highly fragmentary specimens, which are often not identifiable beyond Pan-Trionychidae. Here, we describe a new species of plastomenid soft-shelled turtle...

...Walter G. Joyce; Tyler R. Lyson Abstract Plastomenidae is a poorly diagnosed clade of extinct soft-shelled turtles (Trionychidae) known from the Campanian to Eocene of North America. Five skulls, a mandible, two carapaces, and numerous plastral remains from the Hell Creek Formation (Late Cretaceous...

...HAIYAN TONG; LU LI; HUI OUYANG Abstract Sinaspideretes wimani Young & Chow, 1953 was based on a single shell from the Jurassic red beds of the Sichuan Basin. Originally referred to Trionychidae but later tentatively assigned to Carettochelyidae, it was long thought to be the oldest...

... Formation in the North Escavada Study Area. Testudinata Batsch, 1788 , sensu Joyce et al., 2004 Trionychidae Gray, 1825 , sensu Joyce et al., 2004 Gilmoremys Joyce and Lyson, 2011 Figure 3. DMNH EPV.125905, Gilmoremys gettyspherensis , holotype, Late Cretaceous (late...

... including Trionychidae, Carettochelyidae and Geoemydidae (Testudinoidea). Testudinoids were known in this basin by a single, supposed aquatic species, Isometremys lacuna Chow and Yeh, 1962 . The examination of the new material collected since the first description, and a reexamination of the type material...

...Donald B. Brinkman Abstract The Late Cretaceous of Alberta preserves one of the most complete records of fossil turtles within a single geographic area in North America. The Cenomanian Dunvegan Formation contains the earliest record of the family Trionychidae in North America. The Santonian Milk...

...Figure 11. Trionychidae maxilla and dentaries. Axestemys cf. A. puercensis , A–B , UCM 49231, partial right maxilla in ventral ( A ) and right lateral ( B ) views; C–D , UCM 49228, dentary in dorsal ( C ) and left lateral ( D ) views. Helopanoplia cf. H. distincta ; E–F...

... from which we establish a timescale for the evolution of crown Testudines. Using this we attempt to address evolutionary questions that cannot be resolved with fossils alone, in particular the age of the turtle crown (Testudines) and soft-shelled turtles (Trionychidae), the diversification of side...

... I.G. Vitek N.S. 2013 , Soft-shelled turtles (Trionychidae) from the Bissekty Formation (Late Cretaceous: late Turonian) of Uzbekistan: shell-based taxa : Cretaceous Research , v. 41 , p. 55 – 64...

... Pleistocene Pleurodira Pliocene Quaternary Relusios sinuatos Reptilia Tanzania Tertiary Testudines Testudinidae Testudo Tetrapoda Trionychidae Trionyx triunguis Uganda Vertebrata ...

... Carettochelys insculpta Ramsay, 1887 was initially known from incomplete specimens that did not reveal its currently accepted identity as a cryptodiran turtle related to soft-shelled turtles ( Trionychidae Gray, 1825 ). Based on the few characters known and its geographic distribution, Boulenger (1889...

... was the ancestor of the other, cannot be determined given what little we know about the stratigraphic provenance of the type of F. nanus . Family Trionychidae ( Fitzinger, 1826 ). Bell, 1828 Genus Apalone Rafinesque, 1832 Apalone lima ( Cope, 1869 ) Figure 13 The discovery...

...Fig. 6. Trionychidae, gen. et sp. indet. (A) Costal, specimen UR 00.106. (B) Lateral end of costal, specimen UR 00.106. (C) Lateral end of hypoplastron, specimen UR 97.104.2. Scale bars = 5 mm. ...