Prozostrodon brasiliensis, a probainognathian cynodont from the Late Triassic of Brazil: second record and improvements on its dental anatomy

Autores
Pacheco, Cristian P.; Martinelli, Agustín Guillermo; Pavanatto, Ane E. B.; Soares, Marina; Silva, Sérgio Dias da
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Probainognathian cynodonts are conspicuous elements of the Assemblage Zones of the Triassic Santa Maria Supersequence in southern Brazil. Within this group, the derived clade Prozostrodontia, in which the crown group Mammalia is included, is taxonomic diverse in the Hyperodapedon and Riograndia AZs. We describe here the second known specimen (CAPPA/UFSM 0123) of Prozostrodon brasiliensis, until now only represented by its holotype. CAPPA/UFSM 0123 includes a right dentary with dentition. As in the holotype of P. brasiliensis, it has four lower incisors, pc4 with conspicuous cusp a, and small cusps b, c, and d, pc5-pc6 of ‘triconodont’ type with cusps a > c > b > d, with continuous lingual cingulum bearing up to six small discrete cusps, length of the lower tooth row more than half the length of the dentary, and relatively deep horizontal ramus of the dentary. The new specimen is about 25% smaller than the holotype and there is not a diastema between the canine and postcanine teeth, indicating its juvenile condition. Based on both known specimens of P. brasiliensis, a discussion on tooth replacement is presented, showing that the adult individual has more postcanine tooth morphotypes than the juvenile one.
Fil: Pacheco, Cristian P.. Universidade Federal de Santa Maria; Brasil
Fil: Martinelli, Agustín Guillermo. Universidade Federal do Rio Grande do Sul; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Pavanatto, Ane E. B.. Universidade Federal de Santa Maria; Brasil
Fil: Soares, Marina B.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Dias-da-Silva, Sérgio. Universidade Federal de Santa Maria; Brasil
Materia
CYNODONTIA
HYPERODAPEDON AZ
LOWER JAW
PROZOSTRODONTIA
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/94044
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/94044
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Prozostrodon brasiliensis, a probainognathian cynodont from the Late Triassic of Brazil: second record and improvements on its dental anatomyPacheco, Cristian P.Martinelli, Agustín GuillermoPavanatto, Ane E. B.Soares, MarinaSilva, Sérgio Dias daCYNODONTIAHYPERODAPEDON AZLOWER JAWPROZOSTRODONTIAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Probainognathian cynodonts are conspicuous elements of the Assemblage Zones of the Triassic Santa Maria Supersequence in southern Brazil. Within this group, the derived clade Prozostrodontia, in which the crown group Mammalia is included, is taxonomic diverse in the Hyperodapedon and Riograndia AZs. We describe here the second known specimen (CAPPA/UFSM 0123) of Prozostrodon brasiliensis, until now only represented by its holotype. CAPPA/UFSM 0123 includes a right dentary with dentition. As in the holotype of P. brasiliensis, it has four lower incisors, pc4 with conspicuous cusp a, and small cusps b, c, and d, pc5-pc6 of ‘triconodont’ type with cusps a > c > b > d, with continuous lingual cingulum bearing up to six small discrete cusps, length of the lower tooth row more than half the length of the dentary, and relatively deep horizontal ramus of the dentary. The new specimen is about 25% smaller than the holotype and there is not a diastema between the canine and postcanine teeth, indicating its juvenile condition. Based on both known specimens of P. brasiliensis, a discussion on tooth replacement is presented, showing that the adult individual has more postcanine tooth morphotypes than the juvenile one.Fil: Pacheco, Cristian P.. Universidade Federal de Santa Maria; BrasilFil: Martinelli, Agustín Guillermo. Universidade Federal do Rio Grande do Sul; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Pavanatto, Ane E. B.. Universidade Federal de Santa Maria; BrasilFil: Soares, Marina B.. Universidade Federal do Rio Grande do Sul; BrasilFil: Dias-da-Silva, Sérgio. Universidade Federal de Santa Maria; BrasilTaylor & Francis Ltd2018-05info: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/11336/94044Pacheco, Cristian P.; Martinelli, Agustín Guillermo; Pavanatto, Ane E. B.; Soares, Marina; Silva, Sérgio Dias da; Prozostrodon brasiliensis, a probainognathian cynodont from the Late Triassic of Brazil: second record and improvements on its dental anatomy; Taylor & Francis Ltd; Historical Biology; 30; 4; 5-2018; 475-4850891-29631029-2381CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1080/08912963.2017.1292423info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/08912963.2017.1292423info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:31:43Zoai:ri.conicet.gov.ar:11336/94044instacron: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:34982025-10-22 11:31:44.136CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Prozostrodon brasiliensis, a probainognathian cynodont from the Late Triassic of Brazil: second record and improvements on its dental anatomy
title Prozostrodon brasiliensis, a probainognathian cynodont from the Late Triassic of Brazil: second record and improvements on its dental anatomy
spellingShingle Prozostrodon brasiliensis, a probainognathian cynodont from the Late Triassic of Brazil: second record and improvements on its dental anatomy
Pacheco, Cristian P.
CYNODONTIA
HYPERODAPEDON AZ
LOWER JAW
PROZOSTRODONTIA
title_short Prozostrodon brasiliensis, a probainognathian cynodont from the Late Triassic of Brazil: second record and improvements on its dental anatomy
title_full Prozostrodon brasiliensis, a probainognathian cynodont from the Late Triassic of Brazil: second record and improvements on its dental anatomy
title_fullStr Prozostrodon brasiliensis, a probainognathian cynodont from the Late Triassic of Brazil: second record and improvements on its dental anatomy
title_full_unstemmed Prozostrodon brasiliensis, a probainognathian cynodont from the Late Triassic of Brazil: second record and improvements on its dental anatomy
title_sort Prozostrodon brasiliensis, a probainognathian cynodont from the Late Triassic of Brazil: second record and improvements on its dental anatomy
dc.creator.none.fl_str_mv Pacheco, Cristian P.
Martinelli, Agustín Guillermo
Pavanatto, Ane E. B.
Soares, Marina
Silva, Sérgio Dias da
author Pacheco, Cristian P.
author_facet Pacheco, Cristian P.
Martinelli, Agustín Guillermo
Pavanatto, Ane E. B.
Soares, Marina
Silva, Sérgio Dias da
author_role author
author2 Martinelli, Agustín Guillermo
Pavanatto, Ane E. B.
Soares, Marina
Silva, Sérgio Dias da
author2_role author
author
author
author
dc.subject.none.fl_str_mv CYNODONTIA
HYPERODAPEDON AZ
LOWER JAW
PROZOSTRODONTIA
topic CYNODONTIA
HYPERODAPEDON AZ
LOWER JAW
PROZOSTRODONTIA
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Probainognathian cynodonts are conspicuous elements of the Assemblage Zones of the Triassic Santa Maria Supersequence in southern Brazil. Within this group, the derived clade Prozostrodontia, in which the crown group Mammalia is included, is taxonomic diverse in the Hyperodapedon and Riograndia AZs. We describe here the second known specimen (CAPPA/UFSM 0123) of Prozostrodon brasiliensis, until now only represented by its holotype. CAPPA/UFSM 0123 includes a right dentary with dentition. As in the holotype of P. brasiliensis, it has four lower incisors, pc4 with conspicuous cusp a, and small cusps b, c, and d, pc5-pc6 of ‘triconodont’ type with cusps a > c > b > d, with continuous lingual cingulum bearing up to six small discrete cusps, length of the lower tooth row more than half the length of the dentary, and relatively deep horizontal ramus of the dentary. The new specimen is about 25% smaller than the holotype and there is not a diastema between the canine and postcanine teeth, indicating its juvenile condition. Based on both known specimens of P. brasiliensis, a discussion on tooth replacement is presented, showing that the adult individual has more postcanine tooth morphotypes than the juvenile one.
Fil: Pacheco, Cristian P.. Universidade Federal de Santa Maria; Brasil
Fil: Martinelli, Agustín Guillermo. Universidade Federal do Rio Grande do Sul; Brasil. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Pavanatto, Ane E. B.. Universidade Federal de Santa Maria; Brasil
Fil: Soares, Marina B.. Universidade Federal do Rio Grande do Sul; Brasil
Fil: Dias-da-Silva, Sérgio. Universidade Federal de Santa Maria; Brasil
description Probainognathian cynodonts are conspicuous elements of the Assemblage Zones of the Triassic Santa Maria Supersequence in southern Brazil. Within this group, the derived clade Prozostrodontia, in which the crown group Mammalia is included, is taxonomic diverse in the Hyperodapedon and Riograndia AZs. We describe here the second known specimen (CAPPA/UFSM 0123) of Prozostrodon brasiliensis, until now only represented by its holotype. CAPPA/UFSM 0123 includes a right dentary with dentition. As in the holotype of P. brasiliensis, it has four lower incisors, pc4 with conspicuous cusp a, and small cusps b, c, and d, pc5-pc6 of ‘triconodont’ type with cusps a > c > b > d, with continuous lingual cingulum bearing up to six small discrete cusps, length of the lower tooth row more than half the length of the dentary, and relatively deep horizontal ramus of the dentary. The new specimen is about 25% smaller than the holotype and there is not a diastema between the canine and postcanine teeth, indicating its juvenile condition. Based on both known specimens of P. brasiliensis, a discussion on tooth replacement is presented, showing that the adult individual has more postcanine tooth morphotypes than the juvenile one.
publishDate 2018
dc.date.none.fl_str_mv 2018-05
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/11336/94044
Pacheco, Cristian P.; Martinelli, Agustín Guillermo; Pavanatto, Ane E. B.; Soares, Marina; Silva, Sérgio Dias da; Prozostrodon brasiliensis, a probainognathian cynodont from the Late Triassic of Brazil: second record and improvements on its dental anatomy; Taylor & Francis Ltd; Historical Biology; 30; 4; 5-2018; 475-485
0891-2963
1029-2381
CONICET Digital
CONICET
url http://hdl.handle.net/11336/94044
identifier_str_mv Pacheco, Cristian P.; Martinelli, Agustín Guillermo; Pavanatto, Ane E. B.; Soares, Marina; Silva, Sérgio Dias da; Prozostrodon brasiliensis, a probainognathian cynodont from the Late Triassic of Brazil: second record and improvements on its dental anatomy; Taylor & Francis Ltd; Historical Biology; 30; 4; 5-2018; 475-485
0891-2963
1029-2381
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1080/08912963.2017.1292423
info:eu-repo/semantics/altIdentifier/url/https://www.tandfonline.com/doi/full/10.1080/08912963.2017.1292423
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 Taylor & Francis Ltd
publisher.none.fl_str_mv Taylor & Francis Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv 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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score 12.982451

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