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Origin and evolution of turiasaur dinosaurs set by means of a new ‘rosetta’ specimen from Spain
Zoological Journal of the Linnean Society ( IF 2.8 ) Pub Date : 2020-09-03 , DOI: 10.1093/zoolinnean/zlaa091
Rafael Royo-Torres 1 , Alberto Cobos 1 , Pedro Mocho 2, 3 , Luis Alcalá 1
Affiliation  

Turiasauria is a non-neosauropod eusauropod clade of dinosaurs known since 2006, when the description of Turiasaurus was published. This group, including Losillasaurus, was originally thought to have been restricted to the Late Jurassic of Spain. However, over the last decade, our knowledge of this group has improved with the discovery of new taxa such as Zby from the Portuguese Late Jurassic, Tendaguria from the Tanzanian Late Jurassic and Mierasaurus and Moabosaurus from the Early Cretaceous of the USA. Here, we describe a new specimen of Losillasaurus from Spain, which allows us to better understand the character variation in the cranial and postcranial skeleton. The review of some sauropod fauna of Madagascar, and inclusion of some specimens of Turiasauria, suggest that this clade might have arisen in the Middle Jurassic. According to our phylogenetic results, a specimen found in the early 19th century in Madagascar is shown to be the oldest and only member of Turiasauria represented in the Middle Jurassic thus far. This is named Narindasaurus thevenini gen. & sp. nov.. Turiasauria is thus known from the Middle Jurassic in Pangaea, diversified in the Late Jurassic in Gondwana and Laurasia, and dispersed during the Early Cretaceous to North America.

中文翻译:

通过来自西班牙的新“罗塞塔”标本设定的 turiasaur 恐龙的起源和进化

Turiasauria 是一种非新龙脚类恐龙进化枝,自 2006 年公布了Turiasaurus 的描述以来就为人所知。这个群体,包括Losillasaurus,最初被认为仅限于西班牙侏罗纪晚期。然而,在过去十年中,随着新分类群的发现,我们对这一类群的了解有所提高,例如来自葡萄牙晚侏罗世的 Zby、来自坦桑尼亚晚侏罗世的 Tendaguria 以及来自美国早白垩世的 Mierasaurus 和 Moabosaurus。在这里,我们描述了一个来自西班牙的 Losillasaurus 的新标本,这使我们能够更好地了解颅骨和颅后骨骼的特征变化。对马达加斯加的一些蜥脚类动物群的回顾,以及包括一些Turiasauria的标本,表明这个进化枝可能出现在中侏罗世。根据我们的系统发育结果,19 世纪早期在马达加斯加发现的标本被证明是迄今为止中侏罗纪最古老也是唯一的Turiasauria 成员。这被命名为 Narindasaurus thevenini gen。&sp。11月.. 因此,Turiasauria 起源于 Pangaea 的中侏罗世,在冈瓦纳和劳亚大陆的晚侏罗世多样化,并在早白垩世分散到北美。
更新日期:2020-09-03
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