Alcidellus
From Wikipedia, the free encyclopedia
| Alcidellus Temporal range: | |
|---|---|
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Family: | †Oppeliidae |
| Subfamily: | †Oppeliinae |
| Genus: | †Alcidellus Westermann, 1958 |
Alcidellus is an oxyconic (sharp ventered) haploceratacean ammonite from the Middle Jurassic.[2]
Alcidellus was named as a genus buy Gerd Westermann in 1958. It is now generally seen as a subgenus of Oxycerites, differing from Oxyceratites (O) in having a broader venter with ventrolateral shoulders. The shell of Oxycerites, including O (Alcidellus) is generally smooth, essentially involute with a small umbilicus, highly compressed with flanks converging on a narrow, somewhat sharp venter. Sutures are ammonitic.