作者：张法奎

摘要：In 1970, A new Thecodont, Lotosaurus (new genus and new species) was discovered in Middle Triassic Batung formation from sangzhi county, western Hunan. It leas extremely high dorsal neural spines. The shape of each spine is something like a narrow plate. There is no teeth on both upper and lower jaws. The snout is beak-like. The annual phalanges are flattened dorso-ventrally. Specimens with Lotosaucrus-like neural spines have been found in various harts of northern and southern continents. Because the material is too scanty, their systematic position is difficult to determine. They had been assigned to Pelycosauria, Coclurosauria, Carnosauria, Prosauropoda or even to Amphibia. Among them Ctenosauriscus rugosus and Ctenospondylus casei were supposed to be the earliest archosaurs, and Ctenosauriscus koen eni, Hypseloachis mirabibis and Spondylosoma absconditum, are closely related to Lotosaurus. Their geographical and stratigraphical distribution would probably provide fossil evidence for the correlation of the continental and marine Middle Triassic deposits of northern and southern hemispheres.

卷期：13卷 03期

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