| 词条 | Huaiheceras |
| 释义 |
| fossil_range = {{fossilrange|Late Cambrian|Late Cambrian|Trempealeauan}} | image = | regnum = Animalia | phylum = Mollusca | classis = Cephalopoda | subclassis = Nautiloidea | ordo = Ellesmerocerida | familia = Huaiheceratidae | genus = Huaiheceras | genus_authority = }} Huaiheceras is a genus of ellesmerocerd from China, and type for the Heuhiceratidae that lived during the Late Cambrian. The shell is small, tubular, gently expanding and with a slight curvature. The siphuncle, which is proportionally naarrow, is on the outer, concave curvature of the shell, suggesting it is exogastric. Septa are close spaced. The genus Huaihecerina is similar but has a slightly greater curvature and greater rate of expansion. References{{no footnotes|date=March 2015}}
2 : Prehistoric nautiloid genera|Ellesmerocerida |
| 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。