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Temporal range: Early Ordovician–Middle Ordovician
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Nautiloidea
Order: Tarphycerida
Family: Trocholitidae
Genus: Litoceras
Billings, 1865

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 within the genera Litoceras include:[1]


  1. ^ "Paleobiology Database: Litoceras". Retrieved 20 August 2013. 
  2. ^ "Paleobiology Database: Litoceras calciferum". Retrieved 20 August 2013. 
  3. ^ "Paleobiology Database: Litoceras versutum". Retrieved 20 August 2013. 
  4. ^ "Paleobiology Database: Litoceras whiteavsi". 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.