A New Conulariid (Cnidaria, Scyphozoa) From the Terminal Ediacaran of Brazil
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.3389/feart.2022.777746 http://hdl.handle.net/11449/240384 |
Resumo: | Paraconularia ediacara n. sp., the oldest documented conulariid cnidarian, is described based on a compressed thin specimen from the terminal Ediacaran Tamengo Formation near Corumbá, Mato Grosso do Sul State, Brazil. The conulariid was collected from a laminated silty shale bed also containing Corumbella werneri and vendotaenid algae. The specimen consists of four partial faces, two of which are mostly covered, and one exposed corner sulcus. The two exposed faces exhibit 32 bell-curve-shaped, nodose transverse ribs, with some nodes preserving a short, adaperturally directed interspace ridge (spine). The transverse ribs bend adapertureward on the shoulders of the corner sulcus, within which the ribs terminate, with the end portions of the ribs from one face alternating with and slightly overlapping those from the adjoining face. This is the first Ediacaran body fossil showing compelling evidence of homology with a particular conulariid genus. However, unlike the periderm of Phanerozoic conulariids, the periderm of P. ediacara lacks calcium phosphate, a difference which may be original or an artifact of diagenesis or weathering. The discovery of P. ediacara in the Tamengo Formation corroborates the hypothesis, based in part on molecular clock studies, that cnidarians originated during mid-late Proterozoic times, and serves as a new internal calibration point, dating the split between scyphozoan and cubozoan cnidarians at no later than 542 Ma. Furthermore, P. ediacara reinforces the argument that the final phase of Ediacaran biotic evolution featured the advent of large-bodied eumetazoans, including, possibly, predators. |
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A New Conulariid (Cnidaria, Scyphozoa) From the Terminal Ediacaran of BrazilconulariidsEdiacaranPaleoecologysystematicsTamengo FormationParaconularia ediacara n. sp., the oldest documented conulariid cnidarian, is described based on a compressed thin specimen from the terminal Ediacaran Tamengo Formation near Corumbá, Mato Grosso do Sul State, Brazil. The conulariid was collected from a laminated silty shale bed also containing Corumbella werneri and vendotaenid algae. The specimen consists of four partial faces, two of which are mostly covered, and one exposed corner sulcus. The two exposed faces exhibit 32 bell-curve-shaped, nodose transverse ribs, with some nodes preserving a short, adaperturally directed interspace ridge (spine). The transverse ribs bend adapertureward on the shoulders of the corner sulcus, within which the ribs terminate, with the end portions of the ribs from one face alternating with and slightly overlapping those from the adjoining face. This is the first Ediacaran body fossil showing compelling evidence of homology with a particular conulariid genus. However, unlike the periderm of Phanerozoic conulariids, the periderm of P. ediacara lacks calcium phosphate, a difference which may be original or an artifact of diagenesis or weathering. The discovery of P. ediacara in the Tamengo Formation corroborates the hypothesis, based in part on molecular clock studies, that cnidarians originated during mid-late Proterozoic times, and serves as a new internal calibration point, dating the split between scyphozoan and cubozoan cnidarians at no later than 542 Ma. Furthermore, P. ediacara reinforces the argument that the final phase of Ediacaran biotic evolution featured the advent of large-bodied eumetazoans, including, possibly, predators.Department of Sedimentary and Environmental Geology Geosciences Institute Universidade de São PauloDepartment of Geology Hanover CollegeDepartment of Invertebrate Paleontology Research Associate Cincinnati Museum CenterSector of Zoology Universidade Estadual Paulista IB UNESPSector of Zoology Universidade Estadual Paulista IB UNESPUniversidade de São Paulo (USP)Hanover CollegeCincinnati Museum CenterUniversidade Estadual Paulista (UNESP)Leme, Juliana M.Van Iten, HeyoSimões, Marcello G. [UNESP]2023-03-01T20:14:48Z2023-03-01T20:14:48Z2022-06-08info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.3389/feart.2022.777746Frontiers in Earth Science, v. 10.2296-6463http://hdl.handle.net/11449/24038410.3389/feart.2022.7777462-s2.0-85133380850Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengFrontiers in Earth Scienceinfo:eu-repo/semantics/openAccess2023-03-01T20:14:48Zoai:repositorio.unesp.br:11449/240384Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-03-01T20:14:48Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
A New Conulariid (Cnidaria, Scyphozoa) From the Terminal Ediacaran of Brazil |
title |
A New Conulariid (Cnidaria, Scyphozoa) From the Terminal Ediacaran of Brazil |
spellingShingle |
A New Conulariid (Cnidaria, Scyphozoa) From the Terminal Ediacaran of Brazil Leme, Juliana M. conulariids Ediacaran Paleoecology systematics Tamengo Formation |
title_short |
A New Conulariid (Cnidaria, Scyphozoa) From the Terminal Ediacaran of Brazil |
title_full |
A New Conulariid (Cnidaria, Scyphozoa) From the Terminal Ediacaran of Brazil |
title_fullStr |
A New Conulariid (Cnidaria, Scyphozoa) From the Terminal Ediacaran of Brazil |
title_full_unstemmed |
A New Conulariid (Cnidaria, Scyphozoa) From the Terminal Ediacaran of Brazil |
title_sort |
A New Conulariid (Cnidaria, Scyphozoa) From the Terminal Ediacaran of Brazil |
author |
Leme, Juliana M. |
author_facet |
Leme, Juliana M. Van Iten, Heyo Simões, Marcello G. [UNESP] |
author_role |
author |
author2 |
Van Iten, Heyo Simões, Marcello G. [UNESP] |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade de São Paulo (USP) Hanover College Cincinnati Museum Center Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Leme, Juliana M. Van Iten, Heyo Simões, Marcello G. [UNESP] |
dc.subject.por.fl_str_mv |
conulariids Ediacaran Paleoecology systematics Tamengo Formation |
topic |
conulariids Ediacaran Paleoecology systematics Tamengo Formation |
description |
Paraconularia ediacara n. sp., the oldest documented conulariid cnidarian, is described based on a compressed thin specimen from the terminal Ediacaran Tamengo Formation near Corumbá, Mato Grosso do Sul State, Brazil. The conulariid was collected from a laminated silty shale bed also containing Corumbella werneri and vendotaenid algae. The specimen consists of four partial faces, two of which are mostly covered, and one exposed corner sulcus. The two exposed faces exhibit 32 bell-curve-shaped, nodose transverse ribs, with some nodes preserving a short, adaperturally directed interspace ridge (spine). The transverse ribs bend adapertureward on the shoulders of the corner sulcus, within which the ribs terminate, with the end portions of the ribs from one face alternating with and slightly overlapping those from the adjoining face. This is the first Ediacaran body fossil showing compelling evidence of homology with a particular conulariid genus. However, unlike the periderm of Phanerozoic conulariids, the periderm of P. ediacara lacks calcium phosphate, a difference which may be original or an artifact of diagenesis or weathering. The discovery of P. ediacara in the Tamengo Formation corroborates the hypothesis, based in part on molecular clock studies, that cnidarians originated during mid-late Proterozoic times, and serves as a new internal calibration point, dating the split between scyphozoan and cubozoan cnidarians at no later than 542 Ma. Furthermore, P. ediacara reinforces the argument that the final phase of Ediacaran biotic evolution featured the advent of large-bodied eumetazoans, including, possibly, predators. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-06-08 2023-03-01T20:14:48Z 2023-03-01T20:14:48Z |
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 |
http://dx.doi.org/10.3389/feart.2022.777746 Frontiers in Earth Science, v. 10. 2296-6463 http://hdl.handle.net/11449/240384 10.3389/feart.2022.777746 2-s2.0-85133380850 |
url |
http://dx.doi.org/10.3389/feart.2022.777746 http://hdl.handle.net/11449/240384 |
identifier_str_mv |
Frontiers in Earth Science, v. 10. 2296-6463 10.3389/feart.2022.777746 2-s2.0-85133380850 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Frontiers in Earth Science |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1799965503752503296 |