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%252C_Razgrad_(Coll._V._Tzankov)_at_the_Sofia_University_'St._Kliment_Ohridski'_Museum_of_Paleontology_and_Historical_Geology.jpg.webp) | |
| 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 |
Notes
- Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
- Wright, C. W. with J.H. Callomon and M.K. Howarth (1996), Mollusca 4 Revised, Cretaceous Ammonoidea, vol. 4, in Treatise on Invertebrate Paleontology, Part L (Roger L. Kaesler et el. eds.), Boulder, Colorado: The Geological Society of America & Lawrence, Kansas: University of Kansas Press, p.48.
References
- "Astieridiscus". Paleobiology Database. Retrieved 30 December 2021.
- "Asteriediscus". Encyclopedia of Life (EOL). Retrieved 30 December 2021.
- Arkell, W.J.; Kummel, B.; Wright, C.W. (1957). Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Lawrence, Kansas: Geological Society of America and University of Kansas Press.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.