The archaic ilial morphology of an enigmatic pipid frog from the upper Pleistocene of the South American pampas

Pipids are odd-looking frogs with a derived morphology that has been considered to be the result of a successful adaptation to a fully aquatic lifestyle. This monophyletic group comprises 33 extant species arranged in three clades mainly distributed in tropical regions of northern South America (Pip...

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Autores principales:	Báez, A.M., Gómez, R.O., Taglioretti, M.L.
Formato:	JOUR
Materias:	adaptation biodiversity climate variation fossil record frog morphology Paleocene-Eocene boundary paleoclimate Pleistocene Argentina Pampas Anura Pipa Pipidae Pipoidea Xenopodinae
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_02724634_v32_n2_p304_Baez
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_02724634_v32_n2_p304_Baez
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spelling	todo:paper_02724634_v32_n2_p304_Baez2023-10-03T15:15:08Z The archaic ilial morphology of an enigmatic pipid frog from the upper Pleistocene of the South American pampas Báez, A.M. Gómez, R.O. Taglioretti, M.L. adaptation biodiversity climate variation fossil record frog morphology Paleocene-Eocene boundary paleoclimate Pleistocene Argentina Pampas Anura Pipa Pipidae Pipoidea Xenopodinae Pipids are odd-looking frogs with a derived morphology that has been considered to be the result of a successful adaptation to a fully aquatic lifestyle. This monophyletic group comprises 33 extant species arranged in three clades mainly distributed in tropical regions of northern South America (Pipa) and sub-Saharan Africa (Xenopodinae and Hymenochirini). Their fossil record, however, documents greater diversity and wider distribution in South America in the Cretaceous and Paleogene. Recently, isolated postcranial bones bearing distinctive pipid features have been collected from Pleistocene beds in Argentina, nearly 2000 km farther south than their present distribution on the continent. Here, we describe a well-preserved pipid ilium possessing features unknown in the living taxa. The fossil is from a new Lujanian (late Pleistocene) locality of the Pampean Region, thereby confirming the intriguing presence of this group in southern South America. We provide a detailed anatomical evaluation of the adult iliac morphology of pipimorphs and use these data, along with molecular data, in a parsimony analysis of living and extinct pipoid taxa to estimate the relationships of the new material. This analysis places the fossil as a stem xenopodine in an unresolved polytomy together with Xenopus romeri from the upper Paleocene-lower Eocene of Brazil and two taxa from the Eocene of Patagonia. These Pleistocene pipid records in the Pampean region and subsequent disappearance may reflect latitudinal shifts owing to the rapid climate changes related to the glacial/interglacial cycles. © 2012 by the Society of Vertebrate Paleontology. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_02724634_v32_n2_p304_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	adaptation biodiversity climate variation fossil record frog morphology Paleocene-Eocene boundary paleoclimate Pleistocene Argentina Pampas Anura Pipa Pipidae Pipoidea Xenopodinae
spellingShingle	adaptation biodiversity climate variation fossil record frog morphology Paleocene-Eocene boundary paleoclimate Pleistocene Argentina Pampas Anura Pipa Pipidae Pipoidea Xenopodinae Báez, A.M. Gómez, R.O. Taglioretti, M.L. The archaic ilial morphology of an enigmatic pipid frog from the upper Pleistocene of the South American pampas
topic_facet	adaptation biodiversity climate variation fossil record frog morphology Paleocene-Eocene boundary paleoclimate Pleistocene Argentina Pampas Anura Pipa Pipidae Pipoidea Xenopodinae
description	Pipids are odd-looking frogs with a derived morphology that has been considered to be the result of a successful adaptation to a fully aquatic lifestyle. This monophyletic group comprises 33 extant species arranged in three clades mainly distributed in tropical regions of northern South America (Pipa) and sub-Saharan Africa (Xenopodinae and Hymenochirini). Their fossil record, however, documents greater diversity and wider distribution in South America in the Cretaceous and Paleogene. Recently, isolated postcranial bones bearing distinctive pipid features have been collected from Pleistocene beds in Argentina, nearly 2000 km farther south than their present distribution on the continent. Here, we describe a well-preserved pipid ilium possessing features unknown in the living taxa. The fossil is from a new Lujanian (late Pleistocene) locality of the Pampean Region, thereby confirming the intriguing presence of this group in southern South America. We provide a detailed anatomical evaluation of the adult iliac morphology of pipimorphs and use these data, along with molecular data, in a parsimony analysis of living and extinct pipoid taxa to estimate the relationships of the new material. This analysis places the fossil as a stem xenopodine in an unresolved polytomy together with Xenopus romeri from the upper Paleocene-lower Eocene of Brazil and two taxa from the Eocene of Patagonia. These Pleistocene pipid records in the Pampean region and subsequent disappearance may reflect latitudinal shifts owing to the rapid climate changes related to the glacial/interglacial cycles. © 2012 by the Society of Vertebrate Paleontology.
format	JOUR
author	Báez, A.M. Gómez, R.O. Taglioretti, M.L.
author_facet	Báez, A.M. Gómez, R.O. Taglioretti, M.L.
author_sort	Báez, A.M.
title	The archaic ilial morphology of an enigmatic pipid frog from the upper Pleistocene of the South American pampas
title_short	The archaic ilial morphology of an enigmatic pipid frog from the upper Pleistocene of the South American pampas
title_full	The archaic ilial morphology of an enigmatic pipid frog from the upper Pleistocene of the South American pampas
title_fullStr	The archaic ilial morphology of an enigmatic pipid frog from the upper Pleistocene of the South American pampas
title_full_unstemmed	The archaic ilial morphology of an enigmatic pipid frog from the upper Pleistocene of the South American pampas
title_sort	archaic ilial morphology of an enigmatic pipid frog from the upper pleistocene of the south american pampas
url	http://hdl.handle.net/20.500.12110/paper_02724634_v32_n2_p304_Baez
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The archaic ilial morphology of an enigmatic pipid frog from the upper Pleistocene of the South American pampas

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