The first crocodyliform from the Chubut Group (Chubut Province, Argentina) and its phylogenetic position within basal Mesoeucrocodylia

A new crocodyliform specimen is presented here found in the Cerro Castaño Member of the Cerro Barcino Formation (Chubut Group). The material consists of cranial and postcranial remains that represent a new taxon that has strong affinities with Peirosauridae, but also shares derived features present...

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Detalles Bibliográficos
Autores principales: Leardi, J.M., Pol, D.
Formato: JOUR
Materias:
Argentina
Central Patagonia
Crocodyliformes
Lower Cretaceous
Peirosauridae
Cretaceous
dinosaur
geographical distribution
Gondwana
new species
phylogenetics
skeletal remains
taxonomy
temporal distribution
Chubut
Patagonia
South America
Mesoeucrocodylia
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_01956671_v30_n6_p1376_Leardi
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_01956671_v30_n6_p1376_Leardi
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spelling todo:paper_01956671_v30_n6_p1376_Leardi2023-10-03T15:09:26Z The first crocodyliform from the Chubut Group (Chubut Province, Argentina) and its phylogenetic position within basal Mesoeucrocodylia Leardi, J.M. Pol, D. Argentina Central Patagonia Crocodyliformes Lower Cretaceous Peirosauridae Cretaceous dinosaur geographical distribution Gondwana new species phylogenetics skeletal remains taxonomy temporal distribution Argentina Chubut Patagonia South America Crocodyliformes Mesoeucrocodylia A new crocodyliform specimen is presented here found in the Cerro Castaño Member of the Cerro Barcino Formation (Chubut Group). The material consists of cranial and postcranial remains that represent a new taxon that has strong affinities with Peirosauridae, but also shares derived features present in Araripesuchus. The phylogenetic relationships of this new taxon were tested through a cladistic analysis depicting it as a member of the Peirosauridae. The inclusion of Barcinosuchus within this clade of basal mesoeucrocodylians is supported by the presence of hypapophyses up to the third or fourth dorsal vertebrae, anterolateral facing edge on postorbital, quadrate dorsal surface divided in two planes by a ridge; mandibular symphysis tapering anterirorly in ventral view, lateral surface of dentary convex anterior to mandibular fenestra, distal body of quadrate well developed, anteroposteriorly thin and lateromedially broad. The new specimen broadens the temporal and geographical distribution of Peirosauridae during the Cretaceous of Gondwana, representing the southern-most and the most ancient record of the group in Patagonia. The new material also provides insights on the postcranial anatomy of peirosaurids, a group that has been so far studied almost exclusively from cranial material. © 2009 Elsevier Ltd. All rights reserved. Fil:Leardi, J.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Pol, D. 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_v30_n6_p1376_Leardi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Argentina
Central Patagonia
Crocodyliformes
Lower Cretaceous
Peirosauridae
Cretaceous
dinosaur
geographical distribution
Gondwana
new species
phylogenetics
skeletal remains
taxonomy
temporal distribution
Argentina
Chubut
Patagonia
South America
Crocodyliformes
Mesoeucrocodylia
spellingShingle Argentina
Central Patagonia
Crocodyliformes
Lower Cretaceous
Peirosauridae
Cretaceous
dinosaur
geographical distribution
Gondwana
new species
phylogenetics
skeletal remains
taxonomy
temporal distribution
Argentina
Chubut
Patagonia
South America
Crocodyliformes
Mesoeucrocodylia
Leardi, J.M.
Pol, D.
The first crocodyliform from the Chubut Group (Chubut Province, Argentina) and its phylogenetic position within basal Mesoeucrocodylia
topic_facet Argentina
Central Patagonia
Crocodyliformes
Lower Cretaceous
Peirosauridae
Cretaceous
dinosaur
geographical distribution
Gondwana
new species
phylogenetics
skeletal remains
taxonomy
temporal distribution
Argentina
Chubut
Patagonia
South America
Crocodyliformes
Mesoeucrocodylia
description A new crocodyliform specimen is presented here found in the Cerro Castaño Member of the Cerro Barcino Formation (Chubut Group). The material consists of cranial and postcranial remains that represent a new taxon that has strong affinities with Peirosauridae, but also shares derived features present in Araripesuchus. The phylogenetic relationships of this new taxon were tested through a cladistic analysis depicting it as a member of the Peirosauridae. The inclusion of Barcinosuchus within this clade of basal mesoeucrocodylians is supported by the presence of hypapophyses up to the third or fourth dorsal vertebrae, anterolateral facing edge on postorbital, quadrate dorsal surface divided in two planes by a ridge; mandibular symphysis tapering anterirorly in ventral view, lateral surface of dentary convex anterior to mandibular fenestra, distal body of quadrate well developed, anteroposteriorly thin and lateromedially broad. The new specimen broadens the temporal and geographical distribution of Peirosauridae during the Cretaceous of Gondwana, representing the southern-most and the most ancient record of the group in Patagonia. The new material also provides insights on the postcranial anatomy of peirosaurids, a group that has been so far studied almost exclusively from cranial material. © 2009 Elsevier Ltd. All rights reserved.
format JOUR
author Leardi, J.M.
Pol, D.
author_facet Leardi, J.M.
Pol, D.
author_sort Leardi, J.M.
title The first crocodyliform from the Chubut Group (Chubut Province, Argentina) and its phylogenetic position within basal Mesoeucrocodylia
title_short The first crocodyliform from the Chubut Group (Chubut Province, Argentina) and its phylogenetic position within basal Mesoeucrocodylia
title_full The first crocodyliform from the Chubut Group (Chubut Province, Argentina) and its phylogenetic position within basal Mesoeucrocodylia
title_fullStr The first crocodyliform from the Chubut Group (Chubut Province, Argentina) and its phylogenetic position within basal Mesoeucrocodylia
title_full_unstemmed The first crocodyliform from the Chubut Group (Chubut Province, Argentina) and its phylogenetic position within basal Mesoeucrocodylia
title_sort first crocodyliform from the chubut group (chubut province, argentina) and its phylogenetic position within basal mesoeucrocodylia
url http://hdl.handle.net/20.500.12110/paper_01956671_v30_n6_p1376_Leardi
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