Our understanding of early metriorhynchid evolution, the highly specialised pelagic clade of Mesozoic crocodylomorphs, is hampered by the paucity of basal metriorhynchoids and how poorly preserved most of these fossils are. This means the transition from a ‘gharial-like’ body-plan to a ‘pseudo-dolphin-like’ one, which characterises metriorhynchoid evolution, is still poorly understood. Herein the Middle Jurassic taxon Teleidosaurus calvadosii (J.A. Eudes-Deslongchamps, 1866) is re-evaluated. The holotype of T. calvadosii was destroyed during World War Two, as were all referred specimens. All that survived are plaster casts of the holotype. However, a recently discovered specimen from the middle Bathonian of Ecouché, Normandy, France is herein referred to T. calvadosii. This specimen preserves the antorbital region, an incomplete mandible and one cervical vertebra. This specimen is designated as neotype of T. calvadosii. The new specimen allows to re-evaluate the anatomy of T. calvadosii, in particular the antorbital fenestra, which has been misunderstood. Moreover, a comparison is made between the French Middle Jurassic metriorhynchoids Teleidosaurus and Eoneustes. Both genera appear as valid and E. bathonicus is considered to be a nomen dubium.

我们对早期子宫胸膜发育的理解，中生代鳄类的高度专业的上层进化枝，由于基底胸膜软骨的缺乏以及大多数这些化石的保存不善而受到阻碍。这意味着从“鼻咽样”的身体计划向“假海豚样”的转变（其特征是子宫软骨发育）的转变仍知之甚少。在此，对中侏罗纪分类群Calusadosii（JA Eudes-Deslongchamps，1866）进行了重新评估。的模式标本T. calvadosii二战期间遭到破坏，因为都被称为标本。幸存下来的是整形的石膏模型。然而，最近发现的来自法国诺曼底伊库奇中巴东人的标本在此称为T. calvadosii。该标本保留了眶部区域，下颌骨不完整和一个颈椎。该标本被指定为卡尔瓦多斯锥虫的新型。新的标本可以重新评估T. calvadosii的解剖结构，尤其是被误解的肛门眶窗。此外，还对法国中侏罗纪侏罗纪拟齿龙和E蛇进行了比较。两种属均有效，并且E.batonicus被认为是nomen dubium。