Skip to content Skip to navigation

Article: Pipid frogs from the Upper Cretaceous of In Beceten, Niger

Publication: Palaeontology
Volume: 41
Part: 4
Publication Date: August 1998
Page(s): 669 691
Author(s): Ana María Báez and Jean-Claude Rage
Addition Information

How to Cite

BÁEZ, A., RAGE, J. 1998. Pipid frogs from the Upper Cretaceous of In Beceten, Niger. Palaeontology41, 4, 669–691.

Online Version Hosted By

The Palaeontological Association (Free Access)


A vertebrate assemblage from the Coniacian-Santonian Ibeceten Formation of southern Niger includes pipid frogs, which are described herein. The fossils occur within fluviatile-lacustrine strata and consist of disarticulated elements. Two pipid taxa are present: the hyperossified Pachybatrachus taqueti gen. et sp. nov., and another unidentified taxon. The phylogenetic relationships of both are discussed in the context of recent hypotheses of pipid evolution. Pachybatrachus exhibits some derived features unknown in other pipids. These include supplementary accretion of bone on the atlantal centrum, which is involved in an additional articulation with the skull, as well as on the ventral surface of other vertebral centra. Following cladistic analysis, it is proposed that Pachybatrachus is a pipine closely related to the living African forms Hymenochirus and Pseudhymenochirus. The presence of the primitive state for some hymenochirine synapomorphies suggests that Pachybatrachus is their sister taxon. The relationships of the unidentified taxon remain equivocal owing to the fragmentary condition of available remains.
PalAss Go! URL: | Twitter: Share on Twitter | Facebook: Share on Facebook | Google+: Share on Google+