Litoceras
| Litoceras Temporal range:
| |
|---|---|
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | Nautiloidea |
| Order: | †Tarphycerida |
| Family: | †Trocholitidae |
| Genus: | †Litoceras Hyatt, 1884 |
Litoceras is a trocholitid (Tarphycerida) genus that has been found in the Lower and Middle Ordovician of Newfoundland. Whorls in Litoceras have a broadly[clarification needed] rounded cross section with its width greater than its height. Litoceras somewhat resembles the tarphyceratid Pionoceras from the same time, except for the siphuncle[clarification needed] being dorsal and in the center.
Species
[edit]Species within the genera Litoceras include:[1]
- Litoceras calciferum (Billings, 1865)[2]
- Litoceras versutum (Billings, 1865)[3]
- Litoceras whiteavsi Hyatt, 1894[4]
References
[edit]- ^ "Paleobiology Database: Litoceras". Paleodb.org. Retrieved 20 August 2013.
- ^ "Paleobiology Database: Litoceras calciferum". Paleodb.org. Retrieved 20 August 2013.
- ^ "Paleobiology Database: Litoceras versutum". Paleodb.org. Retrieved 20 August 2013.
- ^ "Paleobiology Database: Litoceras whiteavsi". Paleodb.org. Retrieved 20 August 2013.
- Furnish, W.M and Glenister, Brian F (1964); Nautiloidea -Tarphycerida in the Treatise on Invertebrate Paleontology, Part L, Nautiloidea, Geological Society of America and Univ of Kansas press.