Record details

Title
    Similarities and differences in the ilia of Late Cretaceous anurans and urodeles
Author
    Eaton, J. G.
    Gardner, J. D.
    Přikryl, Tomáš
    Roček, Zbyněk
Language
    anglicky
Publication type
    článek v odborném periodiku
Source title - serial
    Bulletin de la Societe Geologique de France
Vol./nr.
    Roč. 183, č. 6
Pages
    s. 529-535
Year
    2012
Notes
    Projekt: ME08066, GA MŠk3cav_un_auth*0241440
    Rozsah: 7 s. : WWW
Subject category
    Anura
    Cretaceous
    Ilium
    North America
    Postcranial skeleton
    Urodela
Keyword
    Anurans
    Cretaceous
    Differences
    Ilia
    Late
    Similarities
    Urodeles
Abstract (in english)
   Screen-washing of matrix from 37 Upper Cretaceous microvertebrate localities in southern Utah, USA, yielded a rich sample of anuran disarticulated bones, including nearly 200 ilia. Because the bones are relatively small and delicate and were subject to pre-mortem transport and unavoidable damage when the fossiliferous matrix was collected and processed, none of the recovered ilia retained intact shafts. This means that features such as the form of the anterior end of the shaft and the presence and form of a dorsal crest cannot be used to identify the fossils. Urodele bones also are known from many of the same localities. When anuran and urodele ilia are isolated and missing much of their shafts, they are superficially similar, so it was important to reliably differentiate ilia of the two groups. Here we provide a list and brief descriptions of some of the features that we found useful for distinguishing between anuran and urodele ilia.
   These features relate to differences between the two groups in muscle attachments, contacts between pelvic bones, and structure of the acetabula. Because all of the features exhibit some variation, we recommend that they be used in combination when trying to distinguish between anuran and urodele ilia.
Contributor
    AV ČR Brno, Geologický ústav
Contributor code
    AV ČR, GLÚ
Source format
    U
Import date
    19. 3. 2014