Insights into vase-shaped microfossil diversity and Neoproterozoic biostratigraphy in light of recent Brazilian discoveries

Autor(es)

Morais, L. ^{[1, 2]} ; Lahr, D. J. G. ^[3] ; Rudnitzki, I. D. ^{[1, 4]} ; Freitas, B. T. ^[5] ; Romero, G. R. ^[6] ; Porter, S. M. ^[7] ; Knoll, A. H. ^[8] ; Fairchild, T. R. ^[9]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Astron Geophys & Atmospher Sci, Dept Geophys, Rua Matao 1226, Cidade Univ, BR-05508900 Sao Paulo - Brazil

^[2] Univ Sao Paulo, Inst Geosci, Geochem & Geotecton Program, Rua Lago 562, Cidade Univ, BR-05508080 Sao Paulo - Brazil

^[3] Univ Sao Paulo, Inst Biosci, Dept Zool, Rua Matao, Travessa 14, 101, Cidade Univ, BR-05508090 Sao Paulo - Brazil

^[4] Univ Fed Ouro Preto, DEGEO, Dept Geol, Morro Cruzeiro S-N Bauxita, BR-35400000 Ouro Preto - Brazil

^[5] Univ Estadual Campinas, UNICAMP, Sch Technol, Geol Lab, Rua Paschoal Marmo 1888, BR-13484332 Limeira - Brazil

^[6] Univ Fed Para, Inst Geosci, Geol & Geochem Program, Rua UFPA, Augusto Correa S-N, BR-66075110 Belem, PA - Brazil

^[7] Univ Calif Santa Barbara, Dept Earth Sci, Santa Barbara, CA 93106 - USA

^[8] Harvard Univ, Dept Organism & Evolutionary Biol, Cambridge, MA 02138 - USA

^[9] Univ Sao Paulo, Inst Geosci, Dept Sedimentary & Environm Geol, Rua Lago 562, Cidade Univ, BR-05508080 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PALEONTOLOGY; v. 93, n. 4, p. 612-627, JUL 2019.
• Citações Web of Science: 1

Resumo

Vase-shaped microfossils (VSMs) occur in dolostone clasts within conglomerates, breccias, and diamictites of the Neoproterozoic Urucum Formation, Jacadigo Group, southwest Brazil. Although their taphonomic history is distinct from those of other VSM assemblages, morphometric comparison of Urucum fossils with five others described previously from North America and Europe show that two of the Urucum species-the long-necked Limeta lageniformis Morais, Fairchild, and Lahr in Morais et al., 2017 and the funnel-necked Palaeoamphora urucumense Morais et al., 2017-occur in the Kwagunt and Callison Lake assemblages, as does Pakupaku kabin Riedman, Porter, and Calver, 2017 recently described from the Togari Group, Tasmania. Obelix rootsii (Cohen, Irvine, and Strauss, 2017) new combination, previously known only from the Callison Lake Formation, is documented here from the Kwagunt Formation. In addition, Trigonocyrillium horodyskii (Bloeser, 1985) and Bonniea dacruchares Porter, Meisterfeld, and Knoll, 2003, first described from the Kwagunt assemblage, have now been found in the Urucum Formation. In light of this survey, 16 of the 18 validly described VSM species are now known to occur in the Kwagunt Formation and 13 in the Callison Lake Formation, with 12 of them shared by both formations. The fact that the Urucum VSM assemblage exhibits six of seven species in common with the Kwagunt Formation-L. lageniformis, P. urucumense, Cycliocyrillium simplex Porter, Meisterfeld, and Knoll, 2003, C. torquata Porter, Meisterfeld, and Knoll, 2003, B. dacruchares Porter, Meisterfeld, and Knoll, 2003, and T. horodyskii (Bloeser, 1985)-and all but the last of these in common with the Callison Lake Formation supports correlation of these three assemblages and indicates that the source of the fossiliferous clasts within the Urucum Formation may well have been a now-vanished late Tonian carbonate platform.UUID: http://zoobank.org/ac0becd6-29ff-4491-80fa-0291730fba65 (AU)

• Processo FAPESP: 17/22099-0 - Mecanismos de biomineralização e paleobiologia de microfósseis eucariontes neoproterozóicos da Faixa Paraguai Sul
• Beneficiário: Luana Pereira Costa de Morais
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 16/05937-9 - Estudo comparativo de microfósseis vasiformes nas coleções da Universidade de Harvard e Universidade da Califórnia em Santa Bárbara (Cambridge, MA - Santa Bárbara, CA- EUA)
• Beneficiário: Luana Pereira Costa de Morais
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 13/12852-1 - Tafonomia e sistemática de microfósseis vasiformes neoproterozoicos do Brasil e seu significado paleoecológico e filogenético
• Beneficiário: Luana Pereira Costa de Morais
• Modalidade de apoio: Bolsas no Brasil - Doutorado