The diverse Cretaceous neobatrachian fauna of South America: Uberabatrachus carvalhoi, a new frog from the Maastrichtian Marília Formation, Minas Gerais, Brazil

Herein we report on a new anuran genus and species, Uberabatrachus carvalhoi, from exposures of the Marília Formation (Maastrichtian) at the well-known fossil site "Ponto 1 do Price" near Peirópolis, Uberaba, Brazil. The holotype consists of an articulated partial skeleton characterized by...

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Detalles Bibliográficos
Autor principal: Baez, Ana María
Publicado: 2012
Materias:
Anura
Hyloides
Maastrichtian
Nobleobatrachia
Paleobiogeography
South America
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1342937X_v22_n3-4_p1141_Baez
http://hdl.handle.net/20.500.12110/paper_1342937X_v22_n3-4_p1141_Baez
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_1342937X_v22_n3-4_p1141_Baez
record_format dspace
spelling paper:paper_1342937X_v22_n3-4_p1141_Baez2025-07-30T18:46:20Z The diverse Cretaceous neobatrachian fauna of South America: Uberabatrachus carvalhoi, a new frog from the Maastrichtian Marília Formation, Minas Gerais, Brazil Baez, Ana María Anura Hyloides Maastrichtian Nobleobatrachia Paleobiogeography South America Herein we report on a new anuran genus and species, Uberabatrachus carvalhoi, from exposures of the Marília Formation (Maastrichtian) at the well-known fossil site "Ponto 1 do Price" near Peirópolis, Uberaba, Brazil. The holotype consists of an articulated partial skeleton characterized by a broad, well-ossified skull lacking dermal ornamentation, eight procoelous presacral vertebrae, and posteriorly deflected, cylindrical sacral diapophyses; these features, together with the possible presence of a discrete palatine, are consistent with neobatrachian affinities. It clearly differs from the neobatrachian Baurubatrachus, also from the Marília Formation, in having a skull lacking exostosis and with a different temporal architecture, among other features. It also differs from the still unnamed neobatrachian recovered from the Adamatina Formation in the presence of paired frontoparietals with narrow supraorbital flanges in the anterior orbital region and maxilla-squamosal contact. The new frog is not referable to any of the neobatrachian taxa known from the Aptian-Albian Crato Formation owing to different cranial features (e.g., position of the jaw articulation, relative width of the braincase, and morphology of the frontoparietal). With respect to the extant neobatrachians in the context of recent phylogenetic hypotheses, the cylindrical sacral diapophyses of Uberabatrachus contrast with the dilated diapophyses occurring in australobatrachian hyloids and microhyloid ranoids, whereas the procoelous presacral column is unlike the diplasiocoelous condition of most other ranoids. This evidence together with the combination of features of Uberabatrachus suggests a placement among nobleobatrachian hyloids, although this combination is not shared with any extant or extinct species for which skeletal information is known. From the foregoing we conclude that Uberabatrachus represents a new nobleobatrachian taxon, a record that reinforces the hypothesis of a diversified neobatrachian fauna in South America by the Cretaceous and is consistent with the previous proposal that neobatrachian early diversification is related to the breakup of Gondwana. © 2012 International Association for Gondwana Research. Fil:Báez, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2012 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1342937X_v22_n3-4_p1141_Baez http://hdl.handle.net/20.500.12110/paper_1342937X_v22_n3-4_p1141_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
Hyloides
Maastrichtian
Nobleobatrachia
Paleobiogeography
South America
spellingShingle Anura
Hyloides
Maastrichtian
Nobleobatrachia
Paleobiogeography
South America
Baez, Ana María
The diverse Cretaceous neobatrachian fauna of South America: Uberabatrachus carvalhoi, a new frog from the Maastrichtian Marília Formation, Minas Gerais, Brazil
topic_facet Anura
Hyloides
Maastrichtian
Nobleobatrachia
Paleobiogeography
South America
description Herein we report on a new anuran genus and species, Uberabatrachus carvalhoi, from exposures of the Marília Formation (Maastrichtian) at the well-known fossil site "Ponto 1 do Price" near Peirópolis, Uberaba, Brazil. The holotype consists of an articulated partial skeleton characterized by a broad, well-ossified skull lacking dermal ornamentation, eight procoelous presacral vertebrae, and posteriorly deflected, cylindrical sacral diapophyses; these features, together with the possible presence of a discrete palatine, are consistent with neobatrachian affinities. It clearly differs from the neobatrachian Baurubatrachus, also from the Marília Formation, in having a skull lacking exostosis and with a different temporal architecture, among other features. It also differs from the still unnamed neobatrachian recovered from the Adamatina Formation in the presence of paired frontoparietals with narrow supraorbital flanges in the anterior orbital region and maxilla-squamosal contact. The new frog is not referable to any of the neobatrachian taxa known from the Aptian-Albian Crato Formation owing to different cranial features (e.g., position of the jaw articulation, relative width of the braincase, and morphology of the frontoparietal). With respect to the extant neobatrachians in the context of recent phylogenetic hypotheses, the cylindrical sacral diapophyses of Uberabatrachus contrast with the dilated diapophyses occurring in australobatrachian hyloids and microhyloid ranoids, whereas the procoelous presacral column is unlike the diplasiocoelous condition of most other ranoids. This evidence together with the combination of features of Uberabatrachus suggests a placement among nobleobatrachian hyloids, although this combination is not shared with any extant or extinct species for which skeletal information is known. From the foregoing we conclude that Uberabatrachus represents a new nobleobatrachian taxon, a record that reinforces the hypothesis of a diversified neobatrachian fauna in South America by the Cretaceous and is consistent with the previous proposal that neobatrachian early diversification is related to the breakup of Gondwana. © 2012 International Association for Gondwana Research.
author Baez, Ana María
author_facet Baez, Ana María
author_sort Baez, Ana María
title The diverse Cretaceous neobatrachian fauna of South America: Uberabatrachus carvalhoi, a new frog from the Maastrichtian Marília Formation, Minas Gerais, Brazil
title_short The diverse Cretaceous neobatrachian fauna of South America: Uberabatrachus carvalhoi, a new frog from the Maastrichtian Marília Formation, Minas Gerais, Brazil
title_full The diverse Cretaceous neobatrachian fauna of South America: Uberabatrachus carvalhoi, a new frog from the Maastrichtian Marília Formation, Minas Gerais, Brazil
title_fullStr The diverse Cretaceous neobatrachian fauna of South America: Uberabatrachus carvalhoi, a new frog from the Maastrichtian Marília Formation, Minas Gerais, Brazil
title_full_unstemmed The diverse Cretaceous neobatrachian fauna of South America: Uberabatrachus carvalhoi, a new frog from the Maastrichtian Marília Formation, Minas Gerais, Brazil
title_sort diverse cretaceous neobatrachian fauna of south america: uberabatrachus carvalhoi, a new frog from the maastrichtian marília formation, minas gerais, brazil
publishDate 2012
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1342937X_v22_n3-4_p1141_Baez
http://hdl.handle.net/20.500.12110/paper_1342937X_v22_n3-4_p1141_Baez
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AT baezanamaria diversecretaceousneobatrachianfaunaofsouthamericauberabatrachuscarvalhoianewfrogfromthemaastrichtianmariliaformationminasgeraisbrazil
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