New occurrence of Mawsonia (Sarcopterygii: Actinistia) from the Early Cretaceous of the Sanfranciscana Basin, Minas Gerais, southeastern Brazil

The Cretaceous actinistian Mawsonia is represented by more than 360 dissociated, but well-preserved, bones obtained from the Areado Group in the Sanfranciscana Basin of Minas Gerais, Brazil. These are among the oldest records of Mawsonia Berriasian, Lower Neocomian)and include previously undescribed...

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Authors: CARVALHO, Marise Sardenberg Salgado de, MAISEY, John G
Format: article
Status:Published version
Publication Date:2008
Country:Brasil
Institution:Companhia de Pesquisa de Recursos Minerais (CPRM)
Repository:Repositório Institucional de Geociências - RIGEO
Language:English
OAI Identifier:oai:rigeo.sgb.gov.br:doc/556
Online Access:https://rigeo.sgb.gov.br/handle/doc/556
Access Level:Open access
Keyword:PALEONTOLOGIA
ESTRATIGRAFIA
MAWSONIA
CRETÁCEO
BRASIL
MINAS GERAIS
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spelling New occurrence of Mawsonia (Sarcopterygii: Actinistia) from the Early Cretaceous of the Sanfranciscana Basin, Minas Gerais, southeastern BrazilPALEONTOLOGIAESTRATIGRAFIAMAWSONIACRETÁCEOBRASILMINAS GERAISThe Cretaceous actinistian Mawsonia is represented by more than 360 dissociated, but well-preserved, bones obtained from the Areado Group in the Sanfranciscana Basin of Minas Gerais, Brazil. These are among the oldest records of Mawsonia Berriasian, Lower Neocomian)and include previously undescribed or poorly known skeletal elements (e.g.splenial, dentary,autopalatine, zygals).The new material is referred to the type species, M.gigas. Morphological|variation in the sample blurs some of the distinctions formerly drawn between nominal species of Mawsonia, and species level diversity in the genus is difficult to establish. Mawsonia bangiensis, M. libyca, and M. brasiliensis are considered to be junior subjective synonyms of M. gigas. Mawsonia gigas probably appeared prior to the separation of S America and Africa and became widespread throughout much of western Gondwana (including parts of Africa), even surviving briefly on both continents following their separation. Mawsonia tegamensis is a morphologically distinctive Late Cretaceous African species with no evident fossil record in Brazil and which probably arose by vicariant speciation following isolation of a local Mawsonia population during the later stages of rifting between Northern Africa and the rest of Western Gondwana. Similarities between Axelrodichthys, Lualabaea (here regarded as Early Cretaceous in age) and recently described fossils from Morocco, Niger, and Madagascar suggest the presence of a second endemic Cretaceous mawsoniid lineage in northeastern Brazil and Africa2013-12-19T16:32:40Z2013-12-19T16:32:40Z2008info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfCARVALHO, Marise Sardenberg Salgado de; MAISEY, John G. New occurrence of Mawsonia (Sarcopterygii: Actinistia) from the Early Cretaceous of the Sanfranciscana Basin, Minas Gerais, southeastern Brazil. Geological Society of London.Special Publications, Londres, v.v. 295, n., p.109-144, Londres.https://rigeo.sgb.gov.br/handle/doc/556ark:/79692/001300000crffengreponame:Repositório Institucional de Geociências - RIGEOinstname:Companhia de Pesquisa de Recursos Minerais (CPRM)instacron:CPRMinfo:eu-repo/semantics/openAccessCARVALHO, Marise Sardenberg Salgado deMAISEY, John G2025-08-20T21:04:24Zoai:rigeo.sgb.gov.br:doc/556Repositório InstitucionalONGhttps://rigeo.sgb.gov.br/oai/requestrigeo@sgb.gov.bropendoar:43362025-08-20T21:04:24Repositório Institucional de Geociências - RIGEO - Companhia de Pesquisa de Recursos Minerais (CPRM)false
dc.title.none.fl_str_mv New occurrence of Mawsonia (Sarcopterygii: Actinistia) from the Early Cretaceous of the Sanfranciscana Basin, Minas Gerais, southeastern Brazil
title New occurrence of Mawsonia (Sarcopterygii: Actinistia) from the Early Cretaceous of the Sanfranciscana Basin, Minas Gerais, southeastern Brazil
spellingShingle New occurrence of Mawsonia (Sarcopterygii: Actinistia) from the Early Cretaceous of the Sanfranciscana Basin, Minas Gerais, southeastern Brazil
CARVALHO, Marise Sardenberg Salgado de
PALEONTOLOGIA
ESTRATIGRAFIA
MAWSONIA
CRETÁCEO
BRASIL
MINAS GERAIS
title_short New occurrence of Mawsonia (Sarcopterygii: Actinistia) from the Early Cretaceous of the Sanfranciscana Basin, Minas Gerais, southeastern Brazil
title_full New occurrence of Mawsonia (Sarcopterygii: Actinistia) from the Early Cretaceous of the Sanfranciscana Basin, Minas Gerais, southeastern Brazil
title_fullStr New occurrence of Mawsonia (Sarcopterygii: Actinistia) from the Early Cretaceous of the Sanfranciscana Basin, Minas Gerais, southeastern Brazil
title_full_unstemmed New occurrence of Mawsonia (Sarcopterygii: Actinistia) from the Early Cretaceous of the Sanfranciscana Basin, Minas Gerais, southeastern Brazil
title_sort New occurrence of Mawsonia (Sarcopterygii: Actinistia) from the Early Cretaceous of the Sanfranciscana Basin, Minas Gerais, southeastern Brazil
dc.creator.none.fl_str_mv CARVALHO, Marise Sardenberg Salgado de
MAISEY, John G
author CARVALHO, Marise Sardenberg Salgado de
author_facet CARVALHO, Marise Sardenberg Salgado de
MAISEY, John G
author_role author
author2 MAISEY, John G
author2_role author
dc.subject.por.fl_str_mv PALEONTOLOGIA
ESTRATIGRAFIA
MAWSONIA
CRETÁCEO
BRASIL
MINAS GERAIS
topic PALEONTOLOGIA
ESTRATIGRAFIA
MAWSONIA
CRETÁCEO
BRASIL
MINAS GERAIS
description The Cretaceous actinistian Mawsonia is represented by more than 360 dissociated, but well-preserved, bones obtained from the Areado Group in the Sanfranciscana Basin of Minas Gerais, Brazil. These are among the oldest records of Mawsonia Berriasian, Lower Neocomian)and include previously undescribed or poorly known skeletal elements (e.g.splenial, dentary,autopalatine, zygals).The new material is referred to the type species, M.gigas. Morphological|variation in the sample blurs some of the distinctions formerly drawn between nominal species of Mawsonia, and species level diversity in the genus is difficult to establish. Mawsonia bangiensis, M. libyca, and M. brasiliensis are considered to be junior subjective synonyms of M. gigas. Mawsonia gigas probably appeared prior to the separation of S America and Africa and became widespread throughout much of western Gondwana (including parts of Africa), even surviving briefly on both continents following their separation. Mawsonia tegamensis is a morphologically distinctive Late Cretaceous African species with no evident fossil record in Brazil and which probably arose by vicariant speciation following isolation of a local Mawsonia population during the later stages of rifting between Northern Africa and the rest of Western Gondwana. Similarities between Axelrodichthys, Lualabaea (here regarded as Early Cretaceous in age) and recently described fossils from Morocco, Niger, and Madagascar suggest the presence of a second endemic Cretaceous mawsoniid lineage in northeastern Brazil and Africa
publishDate 2008
dc.date.none.fl_str_mv 2008
2013-12-19T16:32:40Z
2013-12-19T16:32:40Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv CARVALHO, Marise Sardenberg Salgado de; MAISEY, John G. New occurrence of Mawsonia (Sarcopterygii: Actinistia) from the Early Cretaceous of the Sanfranciscana Basin, Minas Gerais, southeastern Brazil. Geological Society of London.Special Publications, Londres, v.v. 295, n., p.109-144, Londres.
https://rigeo.sgb.gov.br/handle/doc/556
dc.identifier.dark.fl_str_mv ark:/79692/001300000crff
identifier_str_mv CARVALHO, Marise Sardenberg Salgado de; MAISEY, John G. New occurrence of Mawsonia (Sarcopterygii: Actinistia) from the Early Cretaceous of the Sanfranciscana Basin, Minas Gerais, southeastern Brazil. Geological Society of London.Special Publications, Londres, v.v. 295, n., p.109-144, Londres.
ark:/79692/001300000crff
url https://rigeo.sgb.gov.br/handle/doc/556
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional de Geociências - RIGEO
instname:Companhia de Pesquisa de Recursos Minerais (CPRM)
instacron:CPRM
instname_str Companhia de Pesquisa de Recursos Minerais (CPRM)
instacron_str CPRM
institution CPRM
reponame_str Repositório Institucional de Geociências - RIGEO
collection Repositório Institucional de Geociências - RIGEO
repository.name.fl_str_mv Repositório Institucional de Geociências - RIGEO - Companhia de Pesquisa de Recursos Minerais (CPRM)
repository.mail.fl_str_mv rigeo@sgb.gov.br
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score 15,301603

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