The fossil Proboscidea (Mammalia) from Bahia State, Brazil: taxonomy, description, and new locations

IF 0.7 4区地球科学 Q4 PALEONTOLOGY

Revista Brasileira De Paleontologia Pub Date : 2020-10-30 DOI:10.4072/rbp.2020.3.04

M. Rosa, C. Scherer, L. Avilla

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Abstract

Fossils of Proboscidea are abundant in Northeastern Brazil. This study presents the identification and description of Proboscidea fossils from eight natural tank deposits in the Bahia state. The specimens were identified based on comparison with available references and by direct analysis of collection specimens. The fossils from the municipalities of Caldeirao Grande, Nordestina, Teofilândia, and Guanambi were identified only at the order level, while the specimens from the municipalities of Santaluz and Joao Dourado were identified as Notiomastodon platensis. Moreover, five age classes were identified: immature, subadult, adult, mature adult, and senile-adult. The majority of the studied individuals are mature adults. The existing records of Proboscidea from Bahia included a total of 32 localities, and the present study increase in 22% these records. Keywords: Notiomastodon platensis, Pleistocene, Quaternary, Megafauna, South America, Northeast Brazil. Fosseis de Proboscidea sao abundantes no nordeste do Brasil. Este estudo apresenta a identificacao e descricao de fosseis de Proboscidea provenientes de oito depositos naturais do tipo tanque do Estado da Bahia. Os especimes foram identificados com base em comparacoes com referencias disponiveis e com analise direta a especimes em colecao. Os fosseis dos municipios de Caldeirao Grande, Nordestina, Teofilândia e Guanambi foram identificados apenas ao nivel de ordem, enquanto os especimes provenientes dos municipios de Santaluz e Joao Dourado foram identificados como Notiomastodon platensis. Alem disso, cinco faixas etarias foram identificadas: imaturo, subadulto, adulto, adulto maduro e adulto senil. A maioria dos individuos sao adultos maduros. Os registros existentes de Proboscidea na Bahia incluem um total de 32 localidades, e o presente estudo aumenta em 22% esse registro. Palavras-chave: Notiomastodon platensis, Pleistoceno, Quaternario, Megafauna, America do Sul, Nordeste do Brasil.

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巴西巴伊亚州长鼻目（哺乳动物）化石：分类学、描述和新位置

长鼻目化石在巴西东北部分布丰富。本研究对巴伊亚州八个天然储罐沉积物中的长鼻目化石进行了鉴定和描述。这些标本是根据与现有参考文献的比较和对采集标本的直接分析确定的。Calderao Grande市、Nordestina市、Teofilândia市和Guananbi市的化石仅在目级别上被鉴定，而Santaluz市和Joao Dourado市的标本被鉴定为Notiomastodon platensis。此外，还确定了五个年龄段：未成熟、亚成年、成年、成熟和老年。大多数被研究的个体都是成熟的成年人。巴伊亚州长鼻虫的现有记录共包括32个地点，本研究将这些记录增加了22%。关键词：Notiomastodon platensis，更新世，第四纪，大型动物群，南美洲，巴西东北部长鼻目化石丰富。本研究对巴伊亚州八个天然槽型矿床的长鼻目化石进行了鉴定和描述。根据与现有参考文献的比较和对采集标本的直接分析，确定了标本。Calderao-Grande市、Nordestina市、Teofilândia市和Guananbi市的化石仅在顺序层面上被鉴定，而Santaluz市和Joao-Dourado市的标本被鉴定为Notiomastodon platensis。此外，还确定了五个年龄组：未成熟、亚成年、成年、成熟和老年。大多数人都是成熟的成年人。巴伊亚州长鼻虫的现有记录共包括32个地点，本研究将这一记录增加了22%。关键词：高原Notiomastodon platensis，更新世，第四纪，巨型动物群，南美洲，巴西东北部。

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来源期刊

Revista Brasileira De Paleontologia PALEONTOLOGY-

CiteScore

1.60

自引率

14.30%

发文量

审稿时长

>12 weeks

期刊介绍： It publishes original contributions on all aspects of Paleontology. Papers are written in English, Spanish, or Portuguese and are reviewed by international experts.