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''Kamerunoceras'' is an extinct cephalopod genus belonging to the ammonite family Acanthoceratidae found in Upper Cretaceous formations of Nigeria and North America. ''Kamerunoceras'', named by R.A. Reyment in 1954, was tentatively included in the acanthoceratid subfamily Mammitinae in W.J. Arkell,''et al'' (1957) but has since been combined with ''Euomphaloceras'', previously of the Acanthoceratinae ''ibid'', in the Euomphaloceratinae Cooper 1978. ''Kamerunoceras'' is described as being very evolute with a rectangular whorl section and umbilical tubercles only in the middle growth section. Ventrolateral tubercles, found mostly throughout, are spinose. Ribs are irregular, straight at first, becoming denser and sigmoid on the outer whorl.(Arkell 1957) ==References== *Arkell et al., 1957, Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology Part L. Geological Soc. of America and Univ of Kansas Press. *W. A. Cobben and Hook, S. C. 1983 Mid-Cretaceous (Turonian) ammonite fauna from Fence Lake area of west-central New Mexico. Memoir 41, New Mexico Bureau of Mines & Mineral Resources, Socorro NM. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Kamerunoceras」の詳細全文を読む スポンサード リンク
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