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A new toothless pterosaur (Pterodactyloidea) from Southern Brazil with insights into the paleoecology of a Cretaceous desert

机译:来自巴西南部的一条新的无牙翼龙(Pterodactyloidea),洞察着白垩纪沙漠的古生态

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摘要

Abstract Abstract: The first pterosaur bone bed from Brazil was reported in 2014 at the outskirts of the town Cruzeiro do Oeste, Paraná State, in the Southern region of the country. Here named 'cemitério dos pterossauros' site, these outcrops were referred to the Goio-Erê Formation (Turonian-Campanian) of the Caiuá Group (Bauru Basin) and revealed the presence of hundreds of isolated or partially articulated elements of the tapejarine pterosaur Caiuajara and fewer amounts of a theropod dinosaur. Here we present a new tapejaromorph flying reptile from this site, Keresdrakon vilsoni gen. et sp. nov., which shows a unique blunt ridge on the dorsal surface of the posterior end of the dentary. Morphological and osteohistological features indicate that all recovered individuals represent late juveniles or sub-adults. This site shows the first direct evidence of sympatry in Pterosauria. The two distinct flying reptiles coexisted with a theropod dinosaur, providing a rare glimpse of a paleobiological community from a Cretaceous desert.
机译:摘要摘要:巴西的第一个翼龙骨床在2014年报道,在南部地区Cruzeiro Do Oeste镇的郊区,位于该国南部地区。这些露营者名为“CemitérioDoSPterossauros”网站,称为Caiuá集团(Bauru盆地)的Goio-ERê形成(Turonian-Campanian),并透露了数百种孤立或部分铰接元素的肌肉龙毛龙Caiuajara和少量的恐龙数量少。在这里,我们从这个网站上展示了一个新的藏匿爬行动物,Keresdrakon vilsoni Gen。等SP。 11月。,它在伪造的后端的背面上显示了独特的钝脊。形态学和骨质疏松症特征表明所有被恢复的个体代表迟榨幼年或亚成人。本网站显示了佩特罗西亚举行的第一个直接证据。两个不同的飞爬爬行动物与Theropod恐龙共存,从白垩纪沙漠中罕见地瞥见古生物群岛。

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