“Eremoceras”的意思、由来-开放百科全书

词条

Eremoceras

释义

References

{{italic title}}{{Taxobox
| fossil_range = Lower Ordovician
| image =
| regnum = Animalia
| phylum = Mollusca
| classis = Cephalopoda
| ordo = Ellesmerocerida
| familia = Ellesmeroceratidae
| genus = Eremoceras
| genus_authority = Hyatt,1884
| subdivision_ranks = Species
| subdivision =

see text }}

Eremoceras is a genus in the Ellesmeroceratidae which lived during the Early Ordovician, characterized by an orthoconic adult stage, similar to Ellesmeroceras, but with the dorsal side of the adult living chamber somewhat convex, and a juvenile portion that is more gradually expanding and ventrally concave. The siphuncle is ventral, partitioned by diaphragms as typical for the family. Siphuncle segments have short septal necks and thick connecting rings.

References

Rousseu H Flower, 1964. The Nautiloid Order Ellesmeroceratida (Cephalopoda) New Mexico Bureau of Mines and Mineral Resources Memoir 12.

1 : 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。