{{Short description|Extinct genus of nautiloids}} {{Use dmy dates|date=December 2023}} {{Automatic taxobox | fossil_range = {{fossil_range|Early Ordovician|Middle Ordovician}} | taxon = Litoceras | authority = 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{{Clarify|date=October 2009}} rounded cross section with its width greater than its height. Litoceras somewhat resembles the tarphyceratid ''Pionoceras'' from the same time, except for the siphuncle{{Clarify|date=October 2009}} being dorsal and in the center.

==Species== Species within the genera ''Litoceras'' include:<ref>{{cite web|url=https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=13378 |title=Paleobiology Database: Litoceras |publisher=Paleodb.org |date= |access-date=20 August 2013}}</ref>

* ''Litoceras calciferum'' (Billings, 1865)<ref>{{cite web|url=https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=171506 |title=Paleobiology Database: Litoceras calciferum |publisher=Paleodb.org |date= |access-date=20 August 2013}}</ref> * ''Litoceras versutum'' (Billings, 1865)<ref>{{cite web|url=https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=171508 |title=Paleobiology Database: Litoceras versutum |publisher=Paleodb.org |date= |access-date=20 August 2013}}</ref> * ''Litoceras whiteavsi'' Hyatt, 1894<ref>{{cite web|url=https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=171505 |title=Paleobiology Database: Litoceras whiteavsi |publisher=Paleodb.org |date= |access-date=20 August 2013}}</ref>

==References== {{Reflist}} *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.

{{Taxonbar|from=Q6648643}}

Category:Prehistoric nautiloid genera Category:Early Ordovician first appearances Category:Middle Ordovician extinctions Category:Paleozoic life of Newfoundland and Labrador Category:Tarphycerida