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Arctogymnites : ウィキペディア英語版 | Arctogymnites
''Arctogymnites'' is an ammonoid cephalopod from the middle Triassic included in the ceratitid subfamily Beyrichitinae. Related genera include ''Beyrichites'', ''Frechites'', ''Gymnotoceras'', and ''Salterites'' The Treatise Part L, 1957 separates the beyrichitids (Beyrichidae) as an independent family in the Ceratitaceae, separate from the Ceratitidae. Later (Tozer 1981) they were incorporated into the Ceratitidae as a subfamily. ==''References''==
* Arkell ''et al''. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L, Ammonoidea. Geol Soc of America and Univ Kansas press. R. C. Moore (Ed) -- Ceratitaceae, pp L147 -L158 *( Classification of E. T. Tozer 1981 )
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