Ceratiocaris is a genus of paleozoic phyllocarid crustaceans whose fossils are found in marine strata from the Upper Ordovician until the genus' extinction during the Silurian. They are typified by eight short thoracic segments, seven longer abdominal somites and an elongated pretelson somite. Their carapace is slightly oval shaped; they have many ridges parallel to the ventral margin and possess a horn at the anterior end.[1] They are well known from the Silurian Eramosa formation of Ontario, Canada.[2][3]
| Ceratiocaris Temporal range: Tremadocian - Emsian
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| Specimen of C. papilio from Waukesha Biota | |
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| Specimen of C. winneshiekensis from Winneshiek Shale | |
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| Genus: | Ceratiocaris M'Coy, 1849
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| Type species | |
| Ceratiocaris solenoides M'Coy, 1849
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The following species are included:
- Ceratiocaris bohemica Barrande, 1872
- Ceratiocaris harpago Poschmann, Bergmann & Kühl, 2018
- Ceratiocaris macroura Collette & Rudkin, 2010
- Ceratiocaris monroei Salter in Murchison, 1859
- Ceratiocaris murchisoni Jones & Woodward, 1888
- Ceratiocaris papilio Salter in Murchison, 1859
- Ceratiocaris pusilla Matthew, 1889
- Ceratiocaris solenoides M'Coy, 1849
- Ceratiocaris winneshiekensis Briggs et al., 2016[4]
References edit
- ^ Joseph H. Collette; David M. Rudkin (2010). "Phyllocarid crustaceans from the Silurian Eramosa Lagerstätte (Ontario, Canada): taxonomy and functional morphology". Journal of Paleontology. 84 (1): 118–127. Bibcode:2010JPal...84..118C. doi:10.1666/08-174.1. S2CID 131414118.
- ^ J. H. Collette; J. W. Hagadorn (2010). "Early evolution of phyllocarid arthropods: phylogeny and systematics of Cambrian-Devonian archaeostracans". Journal of Paleontology. 84 (5): 795–820. Bibcode:2010JPal...84..795C. doi:10.1666/09-092.1. S2CID 85074218.
- ^ M. Copeland; T. E. Bolton (1985). Fossils of Ontario part 3: the eurypterids and phyllocarids. Life Sciences Miscellaneous Publications. Vol. 48. Royal Ontario Museum. ISBN 0-88854-314-X.
- ^ Derek E.G. Briggs; Huaibao P. Liu; Robert M. McKay; Brian J. Witzke (2016). "Bivalved arthropods from the Middle Ordovician Winneshiek Lagerstätte, Iowa, USA". Journal of Paleontology. 89 (6): 991–1006. doi:10.1017/jpa.2015.76. S2CID 129986104.
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