| 词条 | Metrioceras |
| 释义 |
| name = Metrioceras | fossil_range = | image = | regnum = Animalia | phylum = Mollusca | classis = Cephalopoda | subclassis = Nautiloidea | ordo = | familia = | genus = Metrioceras | genus_authority = }} Metrioceras is an extinct genus of prehistoric nautiloids. The nautiloids are a subclass of shelled cephalopods that were once diverse and numerous but are now represented by only a handful of species. See also{{Portal|Paleontology|Marine life}}
References
1 : Prehistoric nautiloid genera |
| 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。