During the Late Triassic and Early Jurassic, the area around Bristol and South Wales was an archipelago of islands occupied by diverse small-sized tetrapods. The largest of these palaeo-islands was Mendip Island, now forming the Mendip Hills, and the location of some famous fossiliferous sites. These sites have not been described in detail before, and we present new data on three of them. Highcroft has yielded only sparse remains of rhynchocephalians, and Batscombe famously the gliding reptile Kuehneosuchus latissimus. Emborough yielded the richest fauna of the three, abundant pseudosuchians including crocodylomorphs as well as the gliding reptile Kuehneosaurus latus, rare trilophosaurs, a probable thalattosaur, rhynchocephalians, and the mammal Kuehneotherium. These include some of the last known taxa of clades that died out in the end-Triassic mass extinction. We report a new taxon of sphenosuchid crocodylomorph similar to Saltoposuchus and a find of Pachystropheus, an aquatic reptile shared with Holwell and the bedded Rhaetian at Blue Anchor Point, Aust and Westbury Garden Cliff. The discovery of a fish vertebra strengthens the model of Emborough fissure filling in a marginal marine location. The Emborough fauna differs from coeval assemblages from Cromhall, Tytherington and Ruthin in the scarcity of sphenodontians and the absence or great rarity of procolophonids as well as the abundance of kuehneosaurids and crocodylomorphs.

在晚三叠世和早侏罗世期间，布里斯托尔和南威尔士周围地区是一个由各种小型四足动物占据的群岛。这些古岛屿中最大的是门迪普岛，现在形成了门迪普山，也是一些著名的化石遗址的所在地。这些站点以前没有被详细描述过，我们提供了其中三个站点的新数据。海克罗夫特只发现了稀少的喙头类动物遗骸，而巴特斯科姆则出土了著名的滑翔爬行动物Kuehneosuchus latissimus。恩伯勒拥有这三种动物群中最丰富的拟鳄类动物，包括鳄形类动物以及滑翔爬行动物Kuehneosaurus latus、稀有的三脊龙、可能的海龙类、喙头类动物和哺乳动物Kuehneotherium。其中包括一些在三叠纪末期大规模灭绝中灭绝的最后已知的进化枝类群。我们报告了一个与盐鳄相似的蝶鳄类新分类群，并在澳大利亚和韦斯特伯里花园悬崖的蓝锚点发现了一种与霍威尔和卧床雷蒂安共享的水生爬行动物厚营养龙。鱼椎骨的发现加强了边缘海洋位置的恩伯勒裂缝充填模型。恩伯勒动物群与克罗姆霍尔、泰瑟林顿和鲁辛同时代动物群的不同之处在于，蝶齿类动物稀缺，原齿龙类动物不存在或极为稀有，而库恩新龙类动物和鳄形类动物却丰富。