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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Cloudina-Corumbella-Namacalathus association from the Itapucumi Group, Paraguay: Increasing ecosystem complexity and tiering at the end of the Ediacaran

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Author(s):
Warren, Lucas Verissimo ; Quaglio, Fernanda ; Simoes, Marcello Guimaraes ; Gaucher, Claudio ; Riccomini, Claudio ; Poire, Daniel G. ; Freitas, Bernardo Tavares ; Boggiani, Paulo C. ; Sial, Alcides Nobrega
Total Authors: 9
Document type: Journal article
Source: Precambrian Research; v. 298, p. 79-87, SEP 2017.
Web of Science Citations: 15
Abstract

The intriguing Ediacaran fossil Namacalathus is described from limestones of the Tagatiya Guazu Formation, Itapucumi Group, Paraguay. This is the fifth occurrence of the genus in the Ediacaran geological record. The Paraguayan Namacalathus specimens are preserved as partially complete spheroidal cups with an opening at the top and thin walled stems. The remains of this soft-calcified globe-shaped organism occur as sparse disarticulated parautochthonous fragments within bioclastic deposits dominated by Cloudina shells with subordinate Corumbella fragments. The co-occurrence of these three skeletal metazoan species in the same environmental context attests that the diversity of the Paraguayan accumulations is ecologically comparable to the typical skeletal assemblage of the Nama Group. The discovery of new samples of Namacalathus in the Itapucumi Group also indicates that this genus presented a broader paleobiogeographic distribution than previously thought and, in the same way as Cloudina, it represents a low latitude, shallow water metazoan of the Ediacaran Gondwana. (C) 2017 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 10/02677-0 - Stable isotope records (C, O and Sr) of the Itapucumi Group and correlation with Corumbá Group (Ediacaran Period)
Grantee:Paulo César Boggiani
Support Opportunities: Regular Research Grants
FAPESP's process: 10/19584-4 - Tectonics and sedimentation of Itapucumi group in the context of Ediacaran carbonatic platforms: a geochemical, geochronological, paleomagnetic and biostratigraphic approach
Grantee:Lucas Verissimo Warren
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 15/24608-3 - Multi-proxy analysis of the Cerro Negro formation, Argentina: bioestratigraphy and paleoenvironment of the first Ediacaran fossillagerstätte in South America
Grantee:Lucas Verissimo Warren
Support Opportunities: Regular Research Grants