Dealing with homoplasy: osteology and phylogenetic relationships of the bizarre neobatrachian frog Baurubatrachus pricei from the Upper Cretaceous of Brazil
The hyperossified frog Baurubatrachus pricei Báez & Peri 1989 from the Maastrichtian Serra da Galga Member of the Marília Formation is described in detail, as preparation of the type and only known specimen revealed significant features, particularly of the pectoral and pelvic girdles. This spec...
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14772019_v16_n4_p279_Baez http://hdl.handle.net/20.500.12110/paper_14772019_v16_n4_p279_Baez |
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paper:paper_14772019_v16_n4_p279_Baez2023-06-08T16:18:09Z Dealing with homoplasy: osteology and phylogenetic relationships of the bizarre neobatrachian frog Baurubatrachus pricei from the Upper Cretaceous of Brazil Baez, Ana María Australobatrachia Ceratophryidae Maastrichtian Neobatrachia phylogeny South America biostratigraphy bone fossil record frog Maastrichtian microhabitat morphology osteology phylogenetics phylogeny Brazil Anura Neobatrachia The hyperossified frog Baurubatrachus pricei Báez & Peri 1989 from the Maastrichtian Serra da Galga Member of the Marília Formation is described in detail, as preparation of the type and only known specimen revealed significant features, particularly of the pectoral and pelvic girdles. This species is rediagnosed on the basis of the combination of plesiomorphic and derived character states, including two unique traits: cranial roof with round openings that might have contained the tympanic membrane completely circumscribed by ornamented dermal bone, and scapula bearing a conspicuous crest deflected ventrally to form a deep basin on its leading edge. Since its discovery it was suggested that Baurubatrachus might be a relative of the South American ceratophryids, a phylogenetic placement endorsed by recent analyses. In order to test this hypothesis considering all the available information, we conducted several maximum parsimony analyses under different weighting schemes and topological constraints, scoring 143 characters for 71 extant and extinct anuran taxa. Our taxonomic sampling included species with well-ossified dermatocrania as well as less ossified members of main neobatrachian clades to explore the impact of hyperossification, which frequently drives groupings based on homoplastic features. We also assessed the phylogenetic signal provided by cranial and postcranial partitions. Although we recovered a monophyletic Ceratophryidae repeatedly, Baurubatrachus was not related with this nobleobatrachian group but associated with the calyptocephalellid australobatrachians, although with weak support. Other possible phylogenetic placements are also discussed, as well as microhabitat and habits, taking into account both anatomical and geological data. © 2017, © The Trustees of the Natural History Museum, London 2017. All rights reserved. Fil:Báez, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14772019_v16_n4_p279_Baez http://hdl.handle.net/20.500.12110/paper_14772019_v16_n4_p279_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 |
Australobatrachia Ceratophryidae Maastrichtian Neobatrachia phylogeny South America biostratigraphy bone fossil record frog Maastrichtian microhabitat morphology osteology phylogenetics phylogeny Brazil Anura Neobatrachia |
| spellingShingle |
Australobatrachia Ceratophryidae Maastrichtian Neobatrachia phylogeny South America biostratigraphy bone fossil record frog Maastrichtian microhabitat morphology osteology phylogenetics phylogeny Brazil Anura Neobatrachia Baez, Ana María Dealing with homoplasy: osteology and phylogenetic relationships of the bizarre neobatrachian frog Baurubatrachus pricei from the Upper Cretaceous of Brazil |
| topic_facet |
Australobatrachia Ceratophryidae Maastrichtian Neobatrachia phylogeny South America biostratigraphy bone fossil record frog Maastrichtian microhabitat morphology osteology phylogenetics phylogeny Brazil Anura Neobatrachia |
| description |
The hyperossified frog Baurubatrachus pricei Báez & Peri 1989 from the Maastrichtian Serra da Galga Member of the Marília Formation is described in detail, as preparation of the type and only known specimen revealed significant features, particularly of the pectoral and pelvic girdles. This species is rediagnosed on the basis of the combination of plesiomorphic and derived character states, including two unique traits: cranial roof with round openings that might have contained the tympanic membrane completely circumscribed by ornamented dermal bone, and scapula bearing a conspicuous crest deflected ventrally to form a deep basin on its leading edge. Since its discovery it was suggested that Baurubatrachus might be a relative of the South American ceratophryids, a phylogenetic placement endorsed by recent analyses. In order to test this hypothesis considering all the available information, we conducted several maximum parsimony analyses under different weighting schemes and topological constraints, scoring 143 characters for 71 extant and extinct anuran taxa. Our taxonomic sampling included species with well-ossified dermatocrania as well as less ossified members of main neobatrachian clades to explore the impact of hyperossification, which frequently drives groupings based on homoplastic features. We also assessed the phylogenetic signal provided by cranial and postcranial partitions. Although we recovered a monophyletic Ceratophryidae repeatedly, Baurubatrachus was not related with this nobleobatrachian group but associated with the calyptocephalellid australobatrachians, although with weak support. Other possible phylogenetic placements are also discussed, as well as microhabitat and habits, taking into account both anatomical and geological data. © 2017, © The Trustees of the Natural History Museum, London 2017. All rights reserved. |
| author |
Baez, Ana María |
| author_facet |
Baez, Ana María |
| author_sort |
Baez, Ana María |
| title |
Dealing with homoplasy: osteology and phylogenetic relationships of the bizarre neobatrachian frog Baurubatrachus pricei from the Upper Cretaceous of Brazil |
| title_short |
Dealing with homoplasy: osteology and phylogenetic relationships of the bizarre neobatrachian frog Baurubatrachus pricei from the Upper Cretaceous of Brazil |
| title_full |
Dealing with homoplasy: osteology and phylogenetic relationships of the bizarre neobatrachian frog Baurubatrachus pricei from the Upper Cretaceous of Brazil |
| title_fullStr |
Dealing with homoplasy: osteology and phylogenetic relationships of the bizarre neobatrachian frog Baurubatrachus pricei from the Upper Cretaceous of Brazil |
| title_full_unstemmed |
Dealing with homoplasy: osteology and phylogenetic relationships of the bizarre neobatrachian frog Baurubatrachus pricei from the Upper Cretaceous of Brazil |
| title_sort |
dealing with homoplasy: osteology and phylogenetic relationships of the bizarre neobatrachian frog baurubatrachus pricei from the upper cretaceous of brazil |
| publishDate |
2018 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14772019_v16_n4_p279_Baez http://hdl.handle.net/20.500.12110/paper_14772019_v16_n4_p279_Baez |
| work_keys_str_mv |
AT baezanamaria dealingwithhomoplasyosteologyandphylogeneticrelationshipsofthebizarreneobatrachianfrogbaurubatrachuspriceifromtheuppercretaceousofbrazil |
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1768546690519793664 |