NDLI: Generic diversity and distributional dynamics of the Palaeobatrachidae (Amphibia: Anura)

Content Provider	Springer Nature Link
Author	Wuttke, Michael Přikryl, Tomáš Ratnikov, Viacheslav Yu. Dvořák, Zdeněk Roček, Zbyněk
Copyright Year	2012
Abstract	A small palaeobatrachid from the Late Eocene of Kučlín, Czech Republic is described and compared with Middle Eocene palaeobatrachids from Messel, described here as Palaeobatrachus tobieni (Sanchiz 1998) comb. nov., and with Middle Eocene palaeobatrachids from Geiseltal. P. tobieni is the earliest palaeobatrachid documented by articulated skeletons. The description of the Eocene palaeobatrachids from Messel and Kučlín necessitated a revision of all palaeobatrachid genera. In order to correctly assess taxonomic variation within the Palaeobatrachidae, we studied variation in the frontoparietal, one of the most frequently preserved skeletal elements in the palaeobatrachids, in a sample of Palaeobatrachus grandipes from Bechlejovice, Czech Republic. It was found that other genera in which the frontoparietal is known (Pliobatrachus, Albionbatrachus) basically fit into the range of variation seen in Palaeobatrachus. Therefore, the differences that can be observed (e.g., sculpture in Albionbatrachus) may be interspecific in nature, rather than intergeneric. Moreover, some of the diagnostic characters of these genera are already used to diagnose the palaeobatrachid family (e.g., synsacrum in Pliobatrachus). Accordingly, it is proposed that these genera be synonymized with Palaeobatrachus, and that variations among the currently recognised genera be considered diagnostic at the species level only. The distribution of Eocene palaeobatrachids, encompassing only western and central Europe, contrasts with the distribution of palaeobatrachids in post-Eocene times. This suggests a shift in their distribution between the Late Cretaceous and Palaeocene (western Europe) and the Pliocene and Pleistocene (eastern Europe). The last palaeobatrachids were recorded from the Muchkap interglacial (621–568 Ka) in Russia. This implies that palaeobatrachids, as obligate water-dwellers, did not survive the Oka glaciation (474–425 Ka). They were probably “trapped” between a periglacial zone with temperatures below freezing in the north and a dry steppe zone in the south.
Starting Page	367
Ending Page	395
Page Count	29
File Format	PDF
ISSN	18671594
Journal	Palaeobiodiversity and Palaeoenvironments
Volume Number	92
Issue Number	3
e-ISSN	18671608
Language	English
Publisher	Springer-Verlag
Publisher Date	2012-02-14
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Anura Palaeobatrachidae Osteology Europe Palaeogeography Evolution Biodiversity Freshwater & Marine Ecology Animal Systematics/Taxonomy/Biogeography Plant Systematics/Taxonomy/Biogeography Paleontology
Content Type	Text
Resource Type	Article
Subject	Ecology Geology Ecology, Evolution, Behavior and Systematics Global and Planetary Change Paleontology

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