Kosmoceras
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.
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| Kosmoceras pronaie | |
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| Genus: | Kosmoceras Waagen, 1865 |
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Kosmocers belongs to the Stephanoceratoidea and is the type genus for the Family Kosmoceratidae and for the subfamily Kosmoceratinae. Kosmoceras spinosum Waagen is the type species.
Lobokosmoceras and Gulielmiceras have been regarded as subgenera of Kosmoceras. Gulielmites is a fine-ribbed variety of Kosmoceras jason
Species
This genus includes more than 100 species, including:
- K. aculeatum
- K. balticum
- K. cromptoni
- K. bizeti
- K. fibuliferum
- K. geminatum
- K. gemmatum
- K. grossouvrei
- K. interpositum
- K. jason
- K. lithuanicum
- K. medea
- K. obductum
- K. ornatum
- K. phaeinum
- K. proniae
- K. rowlstonese
- K. spinosum
- K. subnodatum
- K. weigelti
Gallery
Kosmoceras cromptoni
Kosmoceras jason
Kosmoceras medea
Kosmoceras ornatum
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
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