Anurans from the Early Cretaceous Lagerstätte of Las Hoyas, Spain: New evidence on the Mesozoic diversification of crown-clade Anura

The late Barremian laminated limestones of Las Hoyas in eastern Spain are famous for the large number, diversity, and quality of the fossils that they have yielded. Herein, anuran remains from these beds representing two new taxa are thoroughly described. Iberobatrachus angelae gen. et sp. nov. is c...

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Detalles Bibliográficos
Autor principal: Báez, A.M.
Formato: JOUR
Materias:
Anura
Barremian
Costata
Las Hoyas
Pipimorpha
Spain
anatomy
frog
lagerstatte
new taxon
parsimony analysis
skeletal remains
skull
taxonomy
Discoglossus
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01956671_v41_n_p90_Baez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_01956671_v41_n_p90_Baez
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spelling todo:paper_01956671_v41_n_p90_Baez2023-10-03T15:09:30Z Anurans from the Early Cretaceous Lagerstätte of Las Hoyas, Spain: New evidence on the Mesozoic diversification of crown-clade Anura Báez, A.M. Anura Barremian Costata Las Hoyas Pipimorpha Spain anatomy Barremian frog lagerstatte new taxon parsimony analysis skeletal remains skull taxonomy Spain Anura Discoglossus The late Barremian laminated limestones of Las Hoyas in eastern Spain are famous for the large number, diversity, and quality of the fossils that they have yielded. Herein, anuran remains from these beds representing two new taxa are thoroughly described. Iberobatrachus angelae gen. et sp. nov. is characterized by a skull nearly as long as it is wide, a narrow neurocranium, frontoparietals fused at least along the posterior half of the orbital length, a distinct palatine process on maxilla, and moderately expanded sacral diapophyses. In turn, Gracilibatrachus avallei gen. et sp. nov. is characterized by a combination of characters that includes an azygous frontoparietal, eight presacral vertebrae, a monovertebral sacrum bearing narrow diapophyses, a bicondylar sacro-urostylar articulation, highly elongate metacarpals, and long distal manual phalanges. The anatomical evidence retrieved in this study is used to explore the taxonomic positions of the new taxa through a maximum parsimony analysis. This analysis supports the placement of I. angelae within Costata close to the extant genus Discoglossus, whereas G. avallei is nested within Xenoanura, as a basal pipimorph. These records corroborate that diversification of costatan and xenoanuran "archaeobatrachian" lineages were already well underway by the Early Cretaceous. © 2012 Elsevier Ltd. Fil:Báez, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_01956671_v41_n_p90_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 Anura
Barremian
Costata
Las Hoyas
Pipimorpha
Spain
anatomy
Barremian
frog
lagerstatte
new taxon
parsimony analysis
skeletal remains
skull
taxonomy
Spain
Anura
Discoglossus
spellingShingle Anura
Barremian
Costata
Las Hoyas
Pipimorpha
Spain
anatomy
Barremian
frog
lagerstatte
new taxon
parsimony analysis
skeletal remains
skull
taxonomy
Spain
Anura
Discoglossus
Báez, A.M.
Anurans from the Early Cretaceous Lagerstätte of Las Hoyas, Spain: New evidence on the Mesozoic diversification of crown-clade Anura
topic_facet Anura
Barremian
Costata
Las Hoyas
Pipimorpha
Spain
anatomy
Barremian
frog
lagerstatte
new taxon
parsimony analysis
skeletal remains
skull
taxonomy
Spain
Anura
Discoglossus
description The late Barremian laminated limestones of Las Hoyas in eastern Spain are famous for the large number, diversity, and quality of the fossils that they have yielded. Herein, anuran remains from these beds representing two new taxa are thoroughly described. Iberobatrachus angelae gen. et sp. nov. is characterized by a skull nearly as long as it is wide, a narrow neurocranium, frontoparietals fused at least along the posterior half of the orbital length, a distinct palatine process on maxilla, and moderately expanded sacral diapophyses. In turn, Gracilibatrachus avallei gen. et sp. nov. is characterized by a combination of characters that includes an azygous frontoparietal, eight presacral vertebrae, a monovertebral sacrum bearing narrow diapophyses, a bicondylar sacro-urostylar articulation, highly elongate metacarpals, and long distal manual phalanges. The anatomical evidence retrieved in this study is used to explore the taxonomic positions of the new taxa through a maximum parsimony analysis. This analysis supports the placement of I. angelae within Costata close to the extant genus Discoglossus, whereas G. avallei is nested within Xenoanura, as a basal pipimorph. These records corroborate that diversification of costatan and xenoanuran "archaeobatrachian" lineages were already well underway by the Early Cretaceous. © 2012 Elsevier Ltd.
format JOUR
author Báez, A.M.
author_facet Báez, A.M.
author_sort Báez, A.M.
title Anurans from the Early Cretaceous Lagerstätte of Las Hoyas, Spain: New evidence on the Mesozoic diversification of crown-clade Anura
title_short Anurans from the Early Cretaceous Lagerstätte of Las Hoyas, Spain: New evidence on the Mesozoic diversification of crown-clade Anura
title_full Anurans from the Early Cretaceous Lagerstätte of Las Hoyas, Spain: New evidence on the Mesozoic diversification of crown-clade Anura
title_fullStr Anurans from the Early Cretaceous Lagerstätte of Las Hoyas, Spain: New evidence on the Mesozoic diversification of crown-clade Anura
title_full_unstemmed Anurans from the Early Cretaceous Lagerstätte of Las Hoyas, Spain: New evidence on the Mesozoic diversification of crown-clade Anura
title_sort anurans from the early cretaceous lagerstätte of las hoyas, spain: new evidence on the mesozoic diversification of crown-clade anura
url http://hdl.handle.net/20.500.12110/paper_01956671_v41_n_p90_Baez
work_keys_str_mv AT baezam anuransfromtheearlycretaceouslagerstatteoflashoyasspainnewevidenceonthemesozoicdiversificationofcrowncladeanura
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