Reconstruction of the dentition of Propyrotherium saxeum Ameghino,1901 (Mammalia, Pyrotheria): Taxonomic and phylogenetic implications
- Autores
- Kramarz, Alejandro Gustavo; Bond, Mariano
- Año de publicación
- 2014
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Propyrotherium saxeum is one the least known members of Pyrotheria, an enigmatic group of extinct, giant, endemic South American ‘ungulates.’ The species was originally described based upon two isolated cheek teeth and two tusk fragments. Later authors assigned additional isolated teeth to this taxon, but the position within the tooth row of all these teeth remained uncertain, preventing an accurate dental characterization and taxonomic distinction from other related species. Here we reexamine the type specimens of P. saxeum and additional materials previously reported as belonging to this species, and analyze several lots of still undescribed specimens, in order to reconstruct the cheek tooth series. Based on comparisons with better known pyrotheres, we conclude that the most probable cheek teeth formula is P2–M3/p2–m3. The cheek teeth gradually increase in size from front to back, and the upper cheek teeth have a gradual increase in loph curvature, as in Pyrotherium. All cheek teeth are bilophodont, but in premolars the anterior loph/id is transversely shorter than the posterior. All have lingual/labial cingulum/id; P3–M3 are subquadratic and three-rooted; p4–m3 are longer than wide, two-rooted, and bear a variably developed vestige of cristid obliqua. Propyrotherium is distinguishable from Griphodon and Baguatherium, but the distinction between these latter two taxa is uncertain with the current evidence. A revised cladistic analysis confirms that Propyrotherium is one of the earliest diverging pyrotheriids, but the resolution of its relationship with Griphodon and Baguatherium requires further evidence.
Fil: Kramarz, Alejandro Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina
Fil: Bond, Mariano. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico de Paleontología de Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina - Materia
-
Propyrotherium
Pyrotheria
Taxonomy
Phylogeny - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/29724
Ver los metadatos del registro completo
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Reconstruction of the dentition of Propyrotherium saxeum Ameghino,1901 (Mammalia, Pyrotheria): Taxonomic and phylogenetic implicationsKramarz, Alejandro GustavoBond, MarianoPropyrotheriumPyrotheriaTaxonomyPhylogenyhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Propyrotherium saxeum is one the least known members of Pyrotheria, an enigmatic group of extinct, giant, endemic South American ‘ungulates.’ The species was originally described based upon two isolated cheek teeth and two tusk fragments. Later authors assigned additional isolated teeth to this taxon, but the position within the tooth row of all these teeth remained uncertain, preventing an accurate dental characterization and taxonomic distinction from other related species. Here we reexamine the type specimens of P. saxeum and additional materials previously reported as belonging to this species, and analyze several lots of still undescribed specimens, in order to reconstruct the cheek tooth series. Based on comparisons with better known pyrotheres, we conclude that the most probable cheek teeth formula is P2–M3/p2–m3. The cheek teeth gradually increase in size from front to back, and the upper cheek teeth have a gradual increase in loph curvature, as in Pyrotherium. All cheek teeth are bilophodont, but in premolars the anterior loph/id is transversely shorter than the posterior. All have lingual/labial cingulum/id; P3–M3 are subquadratic and three-rooted; p4–m3 are longer than wide, two-rooted, and bear a variably developed vestige of cristid obliqua. Propyrotherium is distinguishable from Griphodon and Baguatherium, but the distinction between these latter two taxa is uncertain with the current evidence. A revised cladistic analysis confirms that Propyrotherium is one of the earliest diverging pyrotheriids, but the resolution of its relationship with Griphodon and Baguatherium requires further evidence.Fil: Kramarz, Alejandro Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; ArgentinaFil: Bond, Mariano. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico de Paleontología de Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaSociety of Vertebrate Paleontology2014-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/29724Kramarz, Alejandro Gustavo; Bond, Mariano; Reconstruction of the dentition of Propyrotherium saxeum Ameghino,1901 (Mammalia, Pyrotheria): Taxonomic and phylogenetic implications; Society of Vertebrate Paleontology; Journal of Vertebrate Paleontology; 34; 2; 3-2014; 434-4430272-4634CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1080/02724634.2013.799070info:eu-repo/semantics/altIdentifier/url/http://www.tandfonline.com/doi/abs/10.1080/02724634.2013.799070info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:48:20Zoai:ri.conicet.gov.ar:11336/29724instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:48:20.978CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Reconstruction of the dentition of Propyrotherium saxeum Ameghino,1901 (Mammalia, Pyrotheria): Taxonomic and phylogenetic implications |
title |
Reconstruction of the dentition of Propyrotherium saxeum Ameghino,1901 (Mammalia, Pyrotheria): Taxonomic and phylogenetic implications |
spellingShingle |
Reconstruction of the dentition of Propyrotherium saxeum Ameghino,1901 (Mammalia, Pyrotheria): Taxonomic and phylogenetic implications Kramarz, Alejandro Gustavo Propyrotherium Pyrotheria Taxonomy Phylogeny |
title_short |
Reconstruction of the dentition of Propyrotherium saxeum Ameghino,1901 (Mammalia, Pyrotheria): Taxonomic and phylogenetic implications |
title_full |
Reconstruction of the dentition of Propyrotherium saxeum Ameghino,1901 (Mammalia, Pyrotheria): Taxonomic and phylogenetic implications |
title_fullStr |
Reconstruction of the dentition of Propyrotherium saxeum Ameghino,1901 (Mammalia, Pyrotheria): Taxonomic and phylogenetic implications |
title_full_unstemmed |
Reconstruction of the dentition of Propyrotherium saxeum Ameghino,1901 (Mammalia, Pyrotheria): Taxonomic and phylogenetic implications |
title_sort |
Reconstruction of the dentition of Propyrotherium saxeum Ameghino,1901 (Mammalia, Pyrotheria): Taxonomic and phylogenetic implications |
dc.creator.none.fl_str_mv |
Kramarz, Alejandro Gustavo Bond, Mariano |
author |
Kramarz, Alejandro Gustavo |
author_facet |
Kramarz, Alejandro Gustavo Bond, Mariano |
author_role |
author |
author2 |
Bond, Mariano |
author2_role |
author |
dc.subject.none.fl_str_mv |
Propyrotherium Pyrotheria Taxonomy Phylogeny |
topic |
Propyrotherium Pyrotheria Taxonomy Phylogeny |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Propyrotherium saxeum is one the least known members of Pyrotheria, an enigmatic group of extinct, giant, endemic South American ‘ungulates.’ The species was originally described based upon two isolated cheek teeth and two tusk fragments. Later authors assigned additional isolated teeth to this taxon, but the position within the tooth row of all these teeth remained uncertain, preventing an accurate dental characterization and taxonomic distinction from other related species. Here we reexamine the type specimens of P. saxeum and additional materials previously reported as belonging to this species, and analyze several lots of still undescribed specimens, in order to reconstruct the cheek tooth series. Based on comparisons with better known pyrotheres, we conclude that the most probable cheek teeth formula is P2–M3/p2–m3. The cheek teeth gradually increase in size from front to back, and the upper cheek teeth have a gradual increase in loph curvature, as in Pyrotherium. All cheek teeth are bilophodont, but in premolars the anterior loph/id is transversely shorter than the posterior. All have lingual/labial cingulum/id; P3–M3 are subquadratic and three-rooted; p4–m3 are longer than wide, two-rooted, and bear a variably developed vestige of cristid obliqua. Propyrotherium is distinguishable from Griphodon and Baguatherium, but the distinction between these latter two taxa is uncertain with the current evidence. A revised cladistic analysis confirms that Propyrotherium is one of the earliest diverging pyrotheriids, but the resolution of its relationship with Griphodon and Baguatherium requires further evidence. Fil: Kramarz, Alejandro Gustavo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Parque Centenario. Museo Argentino de Ciencias Naturales "Bernardino Rivadavia"; Argentina Fil: Bond, Mariano. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Departamento Científico de Paleontología de Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina |
description |
Propyrotherium saxeum is one the least known members of Pyrotheria, an enigmatic group of extinct, giant, endemic South American ‘ungulates.’ The species was originally described based upon two isolated cheek teeth and two tusk fragments. Later authors assigned additional isolated teeth to this taxon, but the position within the tooth row of all these teeth remained uncertain, preventing an accurate dental characterization and taxonomic distinction from other related species. Here we reexamine the type specimens of P. saxeum and additional materials previously reported as belonging to this species, and analyze several lots of still undescribed specimens, in order to reconstruct the cheek tooth series. Based on comparisons with better known pyrotheres, we conclude that the most probable cheek teeth formula is P2–M3/p2–m3. The cheek teeth gradually increase in size from front to back, and the upper cheek teeth have a gradual increase in loph curvature, as in Pyrotherium. All cheek teeth are bilophodont, but in premolars the anterior loph/id is transversely shorter than the posterior. All have lingual/labial cingulum/id; P3–M3 are subquadratic and three-rooted; p4–m3 are longer than wide, two-rooted, and bear a variably developed vestige of cristid obliqua. Propyrotherium is distinguishable from Griphodon and Baguatherium, but the distinction between these latter two taxa is uncertain with the current evidence. A revised cladistic analysis confirms that Propyrotherium is one of the earliest diverging pyrotheriids, but the resolution of its relationship with Griphodon and Baguatherium requires further evidence. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-03 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/29724 Kramarz, Alejandro Gustavo; Bond, Mariano; Reconstruction of the dentition of Propyrotherium saxeum Ameghino,1901 (Mammalia, Pyrotheria): Taxonomic and phylogenetic implications; Society of Vertebrate Paleontology; Journal of Vertebrate Paleontology; 34; 2; 3-2014; 434-443 0272-4634 CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/29724 |
identifier_str_mv |
Kramarz, Alejandro Gustavo; Bond, Mariano; Reconstruction of the dentition of Propyrotherium saxeum Ameghino,1901 (Mammalia, Pyrotheria): Taxonomic and phylogenetic implications; Society of Vertebrate Paleontology; Journal of Vertebrate Paleontology; 34; 2; 3-2014; 434-443 0272-4634 CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.1080/02724634.2013.799070 info:eu-repo/semantics/altIdentifier/url/http://www.tandfonline.com/doi/abs/10.1080/02724634.2013.799070 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Society of Vertebrate Paleontology |
publisher.none.fl_str_mv |
Society of Vertebrate Paleontology |
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reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) |
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CONICET Digital (CONICET) |
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Consejo Nacional de Investigaciones Científicas y Técnicas |
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CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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13.070432 |