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A captorhinid-dominated assemblage from the palaeoequatorial Permian of Menorca (Balearic Islands, western Mediterranean)
Earth and Environmental Science Transactions of the Royal Society of Edinburgh ( IF 1.2 ) Pub Date : 2021-07-22 , DOI: 10.1017/s1755691021000268
Rafel MATAMALES-ANDREU 1 , Francesc X. ROIG-MUNAR 2 , Oriol OMS 3 , Àngel GALOBART 4 , Josep FORTUNY 5
Affiliation  

Moradisaurine captorhinid eureptiles were a successful group of high-fibre herbivores that lived in the arid low latitudes of Pangaea during the Permian. Here we describe a palaeoassemblage from the Permian of Menorca (Balearic Islands, western Mediterranean), consisting of ichnites of small captorhinomorph eureptiles, probably moradisaurines (Hyloidichnus), and parareptiles (cf. Erpetopus), and bones of two different taxa of moradisaurines. The smallest of the two is not diagnostic beyond Moradisaurinae incertae sedis. The largest one, on the other hand, shows characters that are not present in any other known species of moradisaurine (densely ornamented maxillar teeth), and it is therefore described as Balearosaurus bombardensis gen. et sp. nov. Other remains found in the same outcrop are identified as cf. Balearosaurus bombardensis gen. et sp. nov., as they could also belong to the newly described taxon. This species is sister to the moradisaurine from the lower Permian of the neighbouring island of Mallorca, and is also closely related to the North American genus Rothianiscus. This makes it possible to suggest the hypothesis that the Variscan mountains, which separated North America from southern Europe during the Permian, were not a very important palaeobiogeographical barrier to the dispersion of moradisaurines. In fact, mapping all moradisaurine occurrences known so far, it is shown that their distribution area encompassed both sides of the Variscan mountains, essentially being restricted to the arid belt of palaeoequatorial Pangaea, where they probably outcompeted other herbivorous clades until they died out in the late Permian.

中文翻译:

来自梅诺卡岛(巴利阿里群岛,西地中海)古赤道二叠纪的以captorhinid为主的组合

Moradisaurine captorhinid eureptiles 是一群成功的高纤维食草动物,在二叠纪期间生活在 Pangea 干旱的低纬度地区。在这里,我们描述了一个来自梅诺卡二叠纪(巴利阿里群岛,地中海西部)的古组合,由小型 captorhinomorph eureptiles 的 ichnites 组成,可能是 moradisaurines(鲶鱼) 和副爬行动物 (cf.鲱鱼),以及两种不同的 moradisaurines 分类群的骨骼。两者中最小的不是莫拉迪龙亚科以外的诊断不确定性. 另一方面,最大的一个显示出任何其他已知的 moradisaurine 物种(装饰密集的上颌牙齿)中不存在的特征,因此被描述为Balearosaurus bombardensis将军 等人。十一月 在同一露头中发现的其他遗骸被确定为 cf。Balearosaurus bombardensis将军 等人。nov.,因为它们也可能属于新描述的分类单元。该物种是来自邻近马略卡岛下二叠纪的莫拉迪龙的姐妹,也与北美属密切相关蔷薇属. 这使得有可能提出这样一种假设,即在二叠纪期间将北美与南欧分开的华力斯坎山脉并不是阻碍 moradisaurines 扩散的一个非常重要的古生物地理屏​​障。事实上,绘制迄今为止已知的所有 moradisaurine 事件表明,它们的分布区域包括 Variscan 山脉的两侧,基本上仅限于古赤道 Pangaea 的干旱带,在那里它们可能在竞争中胜过其他草食性进化枝,直到它们在二叠纪晚期。
更新日期:2021-07-22
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