Litoceras
| Litoceras Temporal range:
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| Genus: | Litoceras Billings, 1865
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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
Species within the genera Litoceras include:[1]
- Litoceras calciferum Billings, 1865[2]
- Litoceras versutum Billings, 1865[3]
- Litoceras whiteavsi Hyatt, 1894[4]
References
- ^ "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.