Astieridiscus

Astieridiscus is an extinct lower Cretaceous ammonite. Its shell evolute, covered by dense, simple or branching, slightly flexuous ribs. The sides are slightly flattened, the venter rounded. No umbilical or other tubercles except on innermost whorl. Superficially resembles Olcostephanus.^[2]

Astieridiscus Temporal range: Barremian[1] PreꞒ Ꞓ O S D C P T J K Pg N ↓
Astieridiscus cadoceroides (Karakasch) Barremian, Razgrad, (Coll. V. Tzankov) at the Sofia University Museum of Paleontology and Historical Geology
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Family:	†Holcodiscidae
Genus:	†Astieridiscus Kilian, 1910