BACKGROUND:Abundant pan-trionychid (soft-shell) turtles specimens have been found in Eocene sequences of central Europe, particularly from two localities in Germany, the Messel Pit (a UNESCO World Natural Heritage Site) and Geiseltal, traditionally attributed to Trionyx messelianus or Rafetoides austriacus. Over the last two decades new specimens of this taxon from these two localities have been discovered and fully prepared. However, they have remained unstudied, as well as their phylogenetic position inside Pan-Trionychidae is unknown. RESULTS:Five new specimens of Palaeoamyda messeliana nov. comb. from Messel Pit and Geiseltal localities are fully described here. A revised diagnosis for the species is also presented here, together with its inclusion in a phylogenetic analysis of Pan-Trionychidae that shows that this species is sister to the extant Amyda cartilaginea, one of the most abundant pan-trionychid (soft-shell) turtles from Asia, both members of the clade Chitrini. The specimens described in here are among the best and most complete fossil pan-trionychid skeletons so far known.

译文

背景:在中欧始新世时期发现了大量的泛甲tri甲标本,特别是在德国的两个地方,即梅塞尔·皮特(联合国教科文组织世界自然遗产)和盖世塔尔(Geiseltal),传统上归因于Trionyx messelianus或南非腊肠。在过去的二十年中,已经发现并充分准备了来自这两个地方的该分类单元的新标本。然而,它们尚未得到研究,并且它们在泛甲Tri科内的系统发育位置尚不清楚。
结果:五个新标本的新标本。梳子。来自Messel Pit的地点和Geiseltal地点在此处得到了充分描述。此处还提供了对该物种的修订诊断,并将其包含在泛-甲的系统发育分析中,该分析表明该物种是现存的八角cart甲(最丰富的泛tri甲(pan)之一)的姊妹姐妹。来自亚洲的Chitrini分支成员。这里描述的标本是迄今已知的最好和最完整的化石泛三生肖骨骼。

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