Kosmoceras

Kosmoceras Temporal range: Callovian PreЄ Є O S D C P T J K Pg N ↓
Kosmoceras pronaie
Scientific classification
Kingdom:	Animalia
Class:	Cephalopoda
Subclass:	Ammonoidea
Order:	Ammonitida
Superfamily:	Stephanocerataceae
Family:	Kosmoceratidae
Genus:	Kosmoceras Waagen, 1865

Kosmoceras is a moderately evolute ammonite genus from the upper Callovian (Middle Jurassic) of Europe with a simple apterure and irregular ribbing interrupted by an irregular row of lateral tubercles. Strong ventral tubercles are separated by a smooth depression running along the rim.

Kosmocers belongs to the Sephanocerataceae and is the type genus for the Family Kosmoceratidae and for the subfamily Kosmoceratinae. Kosmoceras spinosum Waagen is the type species.

Lobokosmoceras and Gulielmicerashave been regarded as subgenera of Kosmoceras. Gulielmites is a fine-ribbed variety of Kosmoceras jason

Species

This genus includes more than 100 species, including:

• Kosmoceras aculeatum
• Kosmoceras balticum
• Kosmoceras bizeti
• Kosmoceras fibuliferum
• Kosmoceras geminatum
• Kosmoceras gemmatum
• Kosmoceras grossouvrei
• Kosmoceras interpositum
• Kosmoceras jason
• Kosmoceras lithuanicum
• Kosmoceras medea
• Kosmoceras obductum
• Kosmoceras phaeinum
• Kosmoceras proniae
• Kosmoceras rowlstonese
• Kosmoceras spinosum
• Kosmoceras subnodatum
• Kosmoceras weigelti

References

• Arkell,et al, 1957. Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L. Geological Soc. of America and Univ. Kansas Press.
• Fossils (Smithsonian Handbooks) by David Ward
• Kosmoceras in the Paleobiology Database
• Mikko's Phylogeny Archive Ammonoidea
• Sepkoski Online Results
• Philippe C. Courville, Catherine Crônier. Diversity or disparity in the Jurassic (Upper Callovian) genus Kosmoceras (Ammonitina): a morphometric approach