| 词条 | Sholakoceras |
| 释义 |
| name = Sholakoceras | fossil_range = L Permian | image = | regnum = Animalia | phylum = Mollusca | classis = Cephalopoda | subclassis = Nautiloidea | ordo = Nautilida | superfamilia = Tainocerataceae | familia = Rhiphaeoceratidae | genus = Sholakoceras | genus_authority = Ruuzhentsev & Shimanskiy, 1954 }} Sholakoceras is an extinct genus of nautiloid cephalopods from the Lower Permian of southern Russia, included in the Tainoceratacean family Rhiphaeoceratidae,(order Nautilida). The shell of Shalakoceras is evolute with a perforate (see through) umbilicus. Whorl sections are subquadrate with the ventral and lateral sides flattened and ventral and ubilical shoulders rounded. Lateral areas bear short, slightly oblique ribs. sutures form broad ventral saddles with a slight, shallow lobe, very shallow lateral lobes, and a deep funnel-shaped dorsal lobe. 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。