Pipid frogs from the upper cretaceous of in beceten, niger

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 taque...

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Autores principales: Báez, A.M., Rage, J.-C.
Formato: JOUR
Materias:
amphibian
Cretaceous
frog
pipid
Niger
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00310239_v41_n4_p669_Baez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00310239_v41_n4_p669_Baez
record_format dspace
spelling todo:paper_00310239_v41_n4_p669_Baez2023-10-03T14:41:07Z Pipid frogs from the upper cretaceous of in beceten, niger Báez, A.M. Rage, J.-C. amphibian Cretaceous frog pipid Niger 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. © The Palaeontologies! Association. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00310239_v41_n4_p669_Baez
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic amphibian
Cretaceous
frog
pipid
Niger
spellingShingle amphibian
Cretaceous
frog
pipid
Niger
Báez, A.M.
Rage, J.-C.
Pipid frogs from the upper cretaceous of in beceten, niger
topic_facet amphibian
Cretaceous
frog
pipid
Niger
description 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. © The Palaeontologies! Association.
format JOUR
author Báez, A.M.
Rage, J.-C.
author_facet Báez, A.M.
Rage, J.-C.
author_sort Báez, A.M.
title Pipid frogs from the upper cretaceous of in beceten, niger
title_short Pipid frogs from the upper cretaceous of in beceten, niger
title_full Pipid frogs from the upper cretaceous of in beceten, niger
title_fullStr Pipid frogs from the upper cretaceous of in beceten, niger
title_full_unstemmed Pipid frogs from the upper cretaceous of in beceten, niger
title_sort pipid frogs from the upper cretaceous of in beceten, niger
url http://hdl.handle.net/20.500.12110/paper_00310239_v41_n4_p669_Baez
work_keys_str_mv AT baezam pipidfrogsfromtheuppercretaceousofinbecetenniger
AT ragejc pipidfrogsfromtheuppercretaceousofinbecetenniger
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