Systematic of a Massively Constructed Specimen of Iguanodon galvensis (Ornithopoda, Iguanodontidae) from the Early Barremian (Early Cretaceous) of Eastern Spain

Diversity Pub Date : 2024-09-17 DOI:10.3390/d16090586
Josué García-Cobeña, Francisco J. Verdú, Alberto Cobos
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Abstract

Styracosternan ornithopods are plenty abundant in the Lower Cretaceous fossil record of Europe. In particular, Iguanodon, the second genus of dinosaurs described worldwide, has been found in UK, Belgium, France, Germany, and Spain, evidencing a wide geographical distribution. Currently, the genus Iguanodon comprises two species, the type species I. bernissartensis from the late Barremian–Aptian of Europe and I. galvensis from the early Barremian of Teruel, Spain. The latter species is well known mainly from perinate and juvenile specimens. Here, axial and appendicular fossils of an adult, large and massively constructed ornithopod from the lower Barremian (Lower Cretaceous) Camarillas Formation of Galve (province of Teruel, Spain) are described. Fossil dimensions and some osteological evidence reveal that the specimen was a large (roughly 10 m long) ornithopod. An autapomorphic feature in the ischium and other characters allow us to ascribe this specimen to I. galvensis. In addition, postcranial co-ossification and fusion of the neurocentral suture indicate that the specimen was skeletally mature. Part of the material studied here was unknown in adults of I. galvensis, providing a better knowledge of the axial and appendicular region of this species.
西班牙东部早白垩世(Early Barremian)Iguanodon galvensis(鸟脚亚目,鬣蜥科)大型构造标本的系统研究
在欧洲的下白垩世化石记录中,有大量的冥龙类鸟脚类动物。特别是在英国、比利时、法国、德国和西班牙都发现了Iguanodon,它是世界上描述的第二个恐龙属,证明了其广泛的地理分布。目前,Iguanodon 属有两个物种,分别是产于欧洲晚期巴利米亚-安普梯的模式种 I. bernissartensis 和产于西班牙特鲁埃尔早期巴利米亚的 I. galvensis。后一物种主要是通过围岩和幼体标本而为人所知。本文描述了来自加尔韦(西班牙特鲁埃尔省)下巴雷姆统(下白垩统)卡马里拉斯地层的一个成年、大型、结构庞大的兽脚类动物的轴向和附肢化石。化石尺寸和一些骨学证据显示,该标本是一种大型(约 10 米长)兽脚类动物。该标本的颚骨具有自同形特征,其他特征使我们可以将其归类为 I. galvensis。此外,颅骨后的共骨化和神经中心缝的融合表明该标本的骨骼已经成熟。这里研究的部分材料在 I. galvensis 成体中是未知的,这使我们对该物种的轴和附肢区域有了更好的了解。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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