TRIONYCHIDAE Bell, 1828

Yanenko, V. & Kovalchuk, О., 2023, Late Miocene Turtles Of Grytsiv (Western Ukraine) With Rodent Gnaw Marks On The Carapace Surface, Zoodiversity 57 (4), pp. 311-322 : 317

FAMILY TRIONYCHIDAE Bell, 1828

Trionychidae indet.

M a t e r i a l. Two shell fragments, NMNHU-P AR 401/1-2 ( FIg. 2 , F, I).

Remarks. The available material is represented by bone fragments, the anatomic assignment of which is limited, as well all other known trionychid remains from Ukraine ( Georgalis & Joyce, 2017). The external surface is covered by a plywood trionychid sculpture (see Scheyer et al., 2007) consisting of moderate shallow circular pits surrounded by ridges.

Testudines indet

M a t e r i a l. Fifty carapace fragments, NMNHU-P AR 408/1-50.

Remarks. All the specimens assigned to this category have different size and shared turtle morphology (see Danilov et al., 2017 for more details), although they are highly fragmentary to make any further identification.

Figures

Fig. 2. Turtle remains from the late Miocene of Grytsiv: A–B — Emys sp., xiphiplastron NMNHU-P AR402/4 (A), marginal scute NMNHU-P AR 402/1 (B); C–E — Melanochelys cf. M. moldavica Chkhikvadze, 1983, costal plate NMNHU-P AR 403 (C), right xiphiplastron NMNHU-P AR 405 (D–E); F, I — Trionychidae indet., shell fragments NMNHU-P AR 401/1 (F), AR 401/2 (I); G–H — Testudo chernovi Khosatzky, 1948, nuchal NMNHU-P AR 406 (G), type specimen after Khosatzky (1948 a: FIg.1), modiFIed (not to scale). Scale bars equal 5 mm in A–C, F–G and I, 10 mm in D and E.