Phylogeny and paleobiogeography of Hegetotheriidae (Mammalia, Notoungulata)

Hegetotheriidae are one of the most derived families of the Order Notoungulata. It is composed of two subfamilies: Hegetotheriinae, which resolves as paraphyletic in most recent phylogenies, and Pachyrukhinae, which historically is considered monophyletic. The family is recognized from late Oligocen...

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Detalles Bibliográficos
Publicado: 2017
Materias:
Bayesian analysis
extinction
genetic analysis
geological record
paleobiogeography
phylogeny
taxonomy
ungulate
Patagonia
Mammalia
Notoungulata
Vertebrata
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02724634_v37_n1_p_Seoane
http://hdl.handle.net/20.500.12110/paper_02724634_v37_n1_p_Seoane
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_02724634_v37_n1_p_Seoane
record_format dspace
spelling paper:paper_02724634_v37_n1_p_Seoane2023-06-08T15:25:16Z Phylogeny and paleobiogeography of Hegetotheriidae (Mammalia, Notoungulata) Bayesian analysis extinction genetic analysis geological record paleobiogeography phylogeny taxonomy ungulate Patagonia Mammalia Notoungulata Vertebrata Hegetotheriidae are one of the most derived families of the Order Notoungulata. It is composed of two subfamilies: Hegetotheriinae, which resolves as paraphyletic in most recent phylogenies, and Pachyrukhinae, which historically is considered monophyletic. The family is recognized from late Oligocene to Pliocene and is well diversified from its earliest records. Most papers on the family are systematic studies and, to a lesser degree, investigate its phylogenetic relationships, but paleobiogeographic approaches are rare. A phylogenetic analysis was carried out using TNT, based on a previous matrix that was augmented with additional taxa and characters. Previous results are supported, viz., the paraphyly of Hegetotherium Ameghino and Paedotherium Burmeister, and the monophyly of Pachyrukhinae, but new conclusions arise, such as the paraphyly of Hemihegetotherium Rovereto and the monophyly of Prohegetotherium Ameghino and Hegetotheriinae. In this work, a paleobiogeographic analysis on hegetotheriids is carried out by means of the Bayesian method using the RASP program, with the aim of estimating the possible ancestral area and vicariance, dispersal, and extinction events. This analysis shows that Hegetotheriidae and both subfamilies originated in central Patagonia (southeast of Chubut and northeast of Santa Cruz provinces). The analysis also reveals that dispersals were the predominant events, and they are related to Cenozoic dispersals to lower latitudes as global cooling advanced and new lands emerged. SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP Citation for this article: Seoane, F. D., S. Roig Juñent, and E. Cerdeño. 2017. Phylogeny and paleobiogeography of Hegetotheriidae (Mammalia, Notoungulata). Journal of Vertebrate Paleontology. DOI: 10.1080/02724634.2017.1278547. © 2017, © by the Society of Vertebrate Paleontology. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02724634_v37_n1_p_Seoane http://hdl.handle.net/20.500.12110/paper_02724634_v37_n1_p_Seoane
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Bayesian analysis
extinction
genetic analysis
geological record
paleobiogeography
phylogeny
taxonomy
ungulate
Patagonia
Mammalia
Notoungulata
Vertebrata
spellingShingle Bayesian analysis
extinction
genetic analysis
geological record
paleobiogeography
phylogeny
taxonomy
ungulate
Patagonia
Mammalia
Notoungulata
Vertebrata
Phylogeny and paleobiogeography of Hegetotheriidae (Mammalia, Notoungulata)
topic_facet Bayesian analysis
extinction
genetic analysis
geological record
paleobiogeography
phylogeny
taxonomy
ungulate
Patagonia
Mammalia
Notoungulata
Vertebrata
description Hegetotheriidae are one of the most derived families of the Order Notoungulata. It is composed of two subfamilies: Hegetotheriinae, which resolves as paraphyletic in most recent phylogenies, and Pachyrukhinae, which historically is considered monophyletic. The family is recognized from late Oligocene to Pliocene and is well diversified from its earliest records. Most papers on the family are systematic studies and, to a lesser degree, investigate its phylogenetic relationships, but paleobiogeographic approaches are rare. A phylogenetic analysis was carried out using TNT, based on a previous matrix that was augmented with additional taxa and characters. Previous results are supported, viz., the paraphyly of Hegetotherium Ameghino and Paedotherium Burmeister, and the monophyly of Pachyrukhinae, but new conclusions arise, such as the paraphyly of Hemihegetotherium Rovereto and the monophyly of Prohegetotherium Ameghino and Hegetotheriinae. In this work, a paleobiogeographic analysis on hegetotheriids is carried out by means of the Bayesian method using the RASP program, with the aim of estimating the possible ancestral area and vicariance, dispersal, and extinction events. This analysis shows that Hegetotheriidae and both subfamilies originated in central Patagonia (southeast of Chubut and northeast of Santa Cruz provinces). The analysis also reveals that dispersals were the predominant events, and they are related to Cenozoic dispersals to lower latitudes as global cooling advanced and new lands emerged. SUPPLEMENTAL DATA—Supplemental materials are available for this article for free at www.tandfonline.com/UJVP Citation for this article: Seoane, F. D., S. Roig Juñent, and E. Cerdeño. 2017. Phylogeny and paleobiogeography of Hegetotheriidae (Mammalia, Notoungulata). Journal of Vertebrate Paleontology. DOI: 10.1080/02724634.2017.1278547. © 2017, © by the Society of Vertebrate Paleontology.
title Phylogeny and paleobiogeography of Hegetotheriidae (Mammalia, Notoungulata)
title_short Phylogeny and paleobiogeography of Hegetotheriidae (Mammalia, Notoungulata)
title_full Phylogeny and paleobiogeography of Hegetotheriidae (Mammalia, Notoungulata)
title_fullStr Phylogeny and paleobiogeography of Hegetotheriidae (Mammalia, Notoungulata)
title_full_unstemmed Phylogeny and paleobiogeography of Hegetotheriidae (Mammalia, Notoungulata)
title_sort phylogeny and paleobiogeography of hegetotheriidae (mammalia, notoungulata)
publishDate 2017
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02724634_v37_n1_p_Seoane
http://hdl.handle.net/20.500.12110/paper_02724634_v37_n1_p_Seoane
_version_ 1768543467070291968

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