Protrachyceras
Protrachyceras is a genus of ceratitid ammonoid cephalopods belonging to the family Trachyceratidae.
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| Fossil of Protrachyceras psaeudoarchelonus | |
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| Genus: | Protrachyceras Mojsisovics 1893 |
Species
- Protrachyceras costulatum Mansuy 1912
- Protrachyceras deprati Mansuy 1912
- Protrachyceras reitzi Boeckh 1875
- Protrachyceras sikanianum McLearn 1930
- Protrachyceras springeri Smith 1914
- Protrachyceras storrsi Smith 1927 was rearranged to Sirenites storrsi (SMITH ) by Tozer 1968
Fossil record
Fossils of Protrachyceras are found in marine strata from the Triassic (age range: from 242.0 to 221.5 million years ago.). Fossils are known from many localities in Afghanistan, Canada, China, India, Italy, Japan, Romania, the Russian Federation, Slovenia, Spain, Switzerland, Thailand and United States.[1]
Bibliography
- Arkell et al. Mesozoic Ammonoidea. Treatise on Invertebrate Paleontology, Part L. 1957
- Bernhard Kummel 1952. A Classification of Triassic Ammonoids. Jour of Paleontology, Vol 26, No.5, pp 847โ853
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