Middle Devonian Crinoids from the Parnaiba Basin (Pimenteira Formation, Tocantins State, Brazil)

Middle Devonian Crinoids from the Parnaiba Basin (Pimenteira Formation, Tocantins State, Brazil)

Author Scheffler, Sandro Marcelo Autor UNIFESP Google Scholar
Dias-Da-Silva, Sergio Google Scholar
Gama Junior, Jose Mendes Google Scholar
Medina Da Fonseca, Vera Maria Google Scholar
Sequeira Fernandes, Antonio Carlos Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Univ Fed Pampa
Universidade de Brasília (UnB)
Universidade Federal do Rio de Janeiro (UFRJ)
Abstract This contribution presents the first description of crinoids from western margin of Parnaiba Basin. It also presents their first description in the Pimenteira Formation (Devonian of the Parnaiba Basin, state of Tocantins, Brazil). The material is represented by hundreds of columnals, pluricolumnals, as well as isolated calyx plates. Columnal and pluricolumnal morphology allowed the identification of Laudonomphalus aff. L. tuberosus, and Exaesiodiscus dimerocrinosus n. sp. Based upon calyx plate morphology a new Rhodocrinitidae species was erected, Monstrocrinus incognitus n. sp. The genera Exaesiodiscus, Laudonomphalus, and Monstrocrinus were previously described from the Devonian of Amazonas Basin. Exaesiodiscus dimerocrinosus is also identified from the northwest margin of Parana Basin. The Monstrocrinus occurrence is rare in the Middle Devonian, until now known in Germany, Spain, and Algeria Lower Devonian (upper Emsian) and only in northern Brazil in the Middle Devonian (Eifelian.) These facts provide valuable arguments for paleogeographic interpretations regarding the pattern of distribution of invertebrates in this region of Gondwana and suggest potential migration routes in northern Gondwana during the Devonian.
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Grant number CNPq: 401763/2010-2
Date 2011-11-01
Published in Journal Of Paleontology. Lawrence: Paleontological Soc Inc, v. 85, n. 6, p. 1188-1198, 2011.
ISSN 0022-3360 (Sherpa/Romeo, impact factor)
Publisher Paleontological Soc Inc
Extent 1188-1198
Origin http://dx.doi.org/10.1666/10-142.1
Access rights Closed access
Type Article
Web of Science ID WOS:000297452200013
URI http://repositorio.unifesp.br/11600/44531

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