| 词条 | Frenguelliceras |
| 释义 |
|fossil_range = Valanginian |regnum = Animalia |phylum = Mollusca |classis = Cephalopoda |subclassis = Ammonoidea |ordo = Ammonitida |superfamilia = Perisphinctoidea |familia = Neocomitidae |genus = Frenguelliceras | genus_authority = Leanza, 1945 }} Frenguelliceras is an ammonite genus from the Lower Cretaceous included in the perisphinctoid family Neocomitidae named by Leanza in 1945. The type species, F. magister, is from the Valanginian,(Lower Cretaceous), of Argentina. Frenguelliceras has an evolute, flat sided shell with coarse, simple or widely splayed ribs dividing from the umbilical edge -inner margin of the outer whorl; venter -outer rim- with a smooth groove, bordered by incipiently tuberculate rib endings. References
5 : Ammonitida genera|Endemoceratoidea|Early Cretaceous ammonites|Fossils of Argentina|Valanginian life |
| 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。