| 词条 | Trachynautilus |
| 释义 |
| fossil_range = Mid - Late Triassic | image = | regnum = Animalia | phylum = Mollusca | classis = Cephalopoda | subclassis = Nautiloidea | ordo = Nautilida | familia = Tainoceratidae | genus = Trachynautilus | genus_authority = Mojsisovics, 1902 }} Trachynautilus is a member of the Tainoceratidae, named by Mojsisovics in 1902, with longitudial ridges on the flanks of its high-arched involute shell. Phloiocedas from the Upper Triassic of North America is similar except that its venter also has longitudinal ridges. Trachynautilus from the middle and Upper Triassic of Europe has a smooth venter. References
4 : Triassic animals of Europe|Nautiloids|Middle Triassic first appearances|Late Triassic extinctions |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。