中文摘要：

Ginglymodi 是完成 infraclass Neopterygii 的三主要的分之一的一组光线鳍鱼。现存 ginglymodians 被长嘴硬鳞鱼代表，它住在诺思和中美洲和古巴的淡水环境。这里，我们报导新 ginglymodian 的保存得很好的石块的发现， Kyphosichthys grandei 情报。et sp。nov，从中间三叠纪(Anisian ) 在 Luoping 的海洋的存款(Guanling 形成) ，东方云南省，中国。发现记录高度深身体的 ginglymodians 的首先已知的石块记录，增加这个组的早词法的差异的新信息。现存的深身体的鱼的功能的形态学的研究显示 Kyphosichthys 不是一个快游泳者，但是在精确调遣有好表演，代表到在结构上建筑群产地的词法改编(例如厚 macrophyte 床，岩石区域，或珊瑚礁石)，它不同于这个组的另外的成员。有包括的新鱼 taxon 的 cladistic 分析支持 Ginglymodi 比到 Teleostei 与 Halecomorphi 有关仔细是更多的假设。由 Felberia， Kyphosichthys，和 Dapedium 代表了，一种高度深、短的鱼身体类型独立地在更低的 neopterygians 以内在茎组 neopterygians， ginglymodians，和基础 teleosts 演变至少三次三叠纪。

英文摘要：

The Ginglymodi are a group of ray-finned fishes that make up one of three major subdivisions of the infraclass Neopterygii. Extant ginglymodians are represented by gars, which inhabit freshwater environments of North and Central America and Cuba. Here, we report the discovery of well-preserved fossils of a new ginglymodian, Kyphosichthys grandei gen. et sp. nov., from the Middle Triassic （Anisian） marine deposits （Guanling Formation） in Luoping, eastern Yunnan Province, China. The discovery documents the first known fossil record of highly deep-bodied ginglymodians, adding new information on the early morphological diversity of this group. The studies of functional morphology of extant deep-bodied fishes indicate that Kyphosichthys is not a fast swimmer but has a good performance in precise maneuvering, representing a morphological adaptation to structurally complex habitats （e.g. thick macrophyte beds, rocky areas, or coral reefs）, which differs from the other members of this group. A cladistic analysis with the new fish taxon included supports the hypothesis that the Ginglymodi are more closely related to the Halecomorphi than to the Teleostei. Represented by Felberia, Kyphosichthys, and Dapedium, a highly deep and short fish body type has independently evolved at least three times in the stem-group neopterygians, ginglymodians, and basal teleosts within the lower neopterygians of the Triassic.