Anisoceras
Anisoceras Temporal range:
| |
---|---|
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Cephalopoda |
Subclass: | †Ammonoidea |
Order: | †Ammonitida |
Suborder: | †Ancyloceratina |
Family: | †Anisoceratidae |
Genus: | †Anisoceras Pictet, 1854 |
Anisoceras is a heteromorph ammonite belonging to the turrilitoid family Anisoceratidae. The shell forms a loose open helical spiral in the early stages, ending in one or two straight shafts in the mature adult. Surface ornament consists of prominent rounded nodes on the lower and upper flanks, connected by strong looped ribs. The nodes may have been the bases of long sharp spines.
References[]
- 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.
- Marcinowski and Wiedmann. The Albian Ammonites of Poland. Palaeontologia Polonica no. 50, 1990
- The Paleobiology Database Anisoceras entry
Categories:
- Ammonitida genera
- Cretaceous ammonites
- Ammonites of Australia
- Albian genus first appearances
- Turonian genus extinctions
- Cenomanian genera
- Fossil taxa described in 1854
- Turrilitoidea
- Ammonitida stubs