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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.)

A new discinoid Kosoidea australis sp. nov. from the Iapo and Vila Maria Formations, NE Parana Basin, Brazil

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Author(s):
Zabini, Carolina [1] ; Furtado-Carvalho, Ana Beatriz [2] ; Carmo, Dermeval Do [3] ; Assine, Mario Luis [4]
Total Authors: 4
Affiliation:
[1] Univ Estadual Campinas, Inst Geosci, Dept Geol & Nat Resources, BR-13083855 Campinas, SP - Brazil
[2] Univ Estadual Campinas, Inst Geosci, Lab Paleohydrogeol, Campinas, SP - Brazil
[3] Univ Brasilia, Inst Geosci, Lab Micropaleontol, Campus Darcy Ribeiro, Brasilia, DF - Brazil
[4] Sao Paulo State Univ UNESP IGCE, Appl Geol Dept, Rio Claro - Brazil
Total Affiliations: 4
Document type: Journal article
Source: HISTORICAL BIOLOGY; v. 33, n. 4 AUG 2019.
Web of Science Citations: 0
Abstract

Many fossil brachiopod genera are used to comprehend previous geological settings. Such fossils often provide trustworthy information about ancient earth configurations, such as the supercontinent Gondwana. This study presents a new occurrence of a discinoid brachiopod, from the Iapo and Vila Maria Formations of the Parana Basin. Fossiliferous strata overlie deposits of glacial and post-glacial times, here interpreted as Hirnantian in age. This is the first occurrence of Kosoidea for Paleozoic strata of Brazilian Sedimentary Basins. A new discinoid species Kosoidea australis sp. nov. is erected. Disarticulated valves are extremely abundant as juveniles in transgressive marine mudrocks. The new species is characterised by a convexo-plane shell and a marked posterior triangular pedicle opening. The microornamentation consists of pits arranged in radial rays, mostly visible on the dorsal valve surface. Adults are rare, and a size-sorting process probably sieved and fragmented the valves during transportation and fossilisation. Medium to large discinoids - such as the one here described - are commonly associated with chilly waters. The presence of this genus both in Soom Shale (Cape Basin, South Africa) and in Parana Basin, associated to sedimentological data points to a possible connection between the two in marginal basins of Gondwana, during the Early Paleozoic. (AU)

FAPESP's process: 17/10956-5 - Taxonomy and fossildiagenetic analysis of Brazilian Paleozoic lingulides from Parnaíba and Paraná Basins
Grantee:Carolina Zabini
Support Opportunities: Regular Research Grants