Bortolin遗址,巴西南部三叠纪(拉底纪/卡尼纪)的一个新的化石地点

IF 0.7 4区 地球科学 Q4 PALEONTOLOGY Revista Brasileira De Paleontologia Pub Date : 2020-07-14 DOI:10.4072/rbp.2020.2.04
Ane E B Pavanatto, Á. A. Da-Rosa, Rodrigo Temp-Müller, Lucio Roberto-Da-Silva, A. M. Ribeiro, A. Martinelli, Sérgio Dias-da-Silva
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引用次数: 8

摘要

本文描述了来自Pinheiros-Chiniqua序列(Santa Maria Supersequence)的一个新的化石遗址,该化石遗址具有典型的恐龙组合带(AZ)的四足动物成分。新场地包含在Faxinal do Soturno结构块中。化石内容以巴西三叠纪首次发现大型腔棘鱼的raisuchian archaesaurus、transodontid和chiniquodontid cynodonts和dicynodonts的颅骨和颅骨后材料以及以粪化石为代表的技术材料为特征。卢安瓜和Massetognathus的存在引发了一个有趣的问题,即与巴西南部、阿根廷西部和非洲的其他地区相比,这个遗址被包括在AZ的恐龙遗址的年龄。与本区其他地区一样,在Bortolin遗址发现的化石标本在化石保存方面表现出显著差异:露头下部(远漫滩)的化石标本保存不均匀(从差到相当好不等),而顶部(近漫滩)的化石标本保存相对较好。这一新的地点具有大量的地层控制化石,是研究三叠纪陆生四足动物分布和与该区其他地点进行比较的关键地点,其中一些历史记录缺乏精确的物源。关键词:龙龙组合带,圣玛丽亚超层序,卢安瓜,腔棘鱼在新发现的化石中描述了一段Pinheiros-Chiniqua (Supersequencia Santa Maria)序列。Este novo sitio esta包括没有Bloco结构Faxinal do Soturno。因此,我们用化石来描述穷的材料,穷的材料,穷的材料,穷的材料,穷的材料,穷的材料,穷的材料,穷的材料,穷的材料,穷的材料,穷的材料。在Luangwa juntamente com Massetognathus的一次会议上,研究人员提出了许多关于恐龙化石的问题,包括恐龙化石、巴西化石、阿根廷化石和非洲化石。不同地区的化石、不同位置的化石、不同位置的化石、不同位置的化石、不同位置的化石、不同位置的化石、不同位置的化石、不同位置的化石、不同位置的化石、不同位置的化石、不同位置的化石、不同位置的化石、不同位置的化石、不同位置的化石、不同位置的化石、不同位置的化石。Esta nova localidade, com uma grande quantidade de fosseis stratigraficamente controlados,构成了uma localidade have para o estudo da distribuicao do四足动物terres do triassio de terres de ZA,以及相同的各种registeres historicos of uma proviicia precision。palavas -chave: Zona de Associacao de Dinodontosaurus, Supersequencia Santa Maria, Luangwa, celacanto。
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Bortolin site, a new fossiliferous locality in the Triassic (Ladinian/Carnian) of southern Brazil
A new fossiliferous site from the Pinheiros-Chiniqua Sequence (Santa Maria Supersequence) with typical tetrapod components of the Dinodontosaurus Assemblage Zone (AZ) is here described. The new site is included in the Faxinal do Soturno Structural Block. The fossil content is characterized by cranial and postcranial material of rauisuchian archosaurs, traversodontid and chiniquodontid cynodonts and dicynodonts, the first occurrence of a large-sized coelacanth fish in the Brazilian Triassic, as well as ichnological material, represented by coprolites. The presence of Luangwa together with Massetognathus raises interesting questions regarding the age of this site included in the Dinodontosaurus AZ when compared with other localities of Southern Brazil, western Argentina and Africa. As in other localities of this AZ, the fossil specimens recovered in Bortolin site exhibit remarkable differences on their fossil preservation: those from the lower portion of the outcrop (distal floodplain) possess a heterogeneous preservation (variable between poor to fairly good) whereas those from the top levels (proximal floodplain) are comparatively better preserved. This new locality, with a large amount of stratigraphically controlled fossils, constitutes a key-locality to study the distribution of Triassic terrestrial tetrapods and to perform comparisons with other sites of this AZ, inwhich several historical records lack a precise provenance. Keywords: Dinodontosaurus Assemblage Zone, Santa Maria Supersequence, Luangwa, coelacanth. Um novo sitio fossilifero e descrito para a Sequencia Pinheiros-Chiniqua (Supersequencia Santa Maria) com tetrapodes tipicos da Zona de Associacao (ZA) de Dinodontosaurus. Este novo sitio esta incluido no Bloco Estrutural Faxinal do Soturno. O conteudo fossil e caracterizado por materiais cranianos e pos-cranianos de arcossauros rauissuquideos, cinodontes chiniquodontideos e traversodontideos e dicinodontes, a primeira ocorrencia de um peixe celacanto de grande tamanho, alem de materiais icnologicos, representados por coprolitos. A presenca de Luangwa juntamente com Massetognathus levanta interessantes questoes acerca da idade desse sitio, incluido na ZA de Dinodontosaurus, quando comparado com outras localidades do sul do Brasil, oeste da Argentina e Africa. Assim como em outras localidades desta ZA, os especimes fosseis coletados no sitio Bortolin apresentam diferencas notaveis na preservacao dos fosseis: fosseis do nivel inferior do afloramento (planicie de inundacao distal) apresentam preservacao heterogenea (variando entre pobre a razoavelmente bem preservado) enquanto que nos niveis superiores (planicie de inundacao proximal), o registro fossil e comparativamente melhor preservado. Esta nova localidade, com uma grande quantidade de fosseis estratigraficamente controlados, constitui uma localidade chave para o estudo da distribuicao dos tetrapodes terrestres do Triassico e sua comparacao com outros sitios desta ZA, na qual varios registros historicos carecem de uma proveniencia precisa. Palavras-chave: Zona de Associacao de Dinodontosaurus, Supersequencia Santa Maria, Luangwa, celacanto.
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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.
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