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Mammitinae comprises a subfamily within the Acanthoceratidae (Ammonoidea) characterized by moderately to very evolute shells with rectangular to squarish whorl sections along with blunt umbilical and prominent inner and outer ventrolateral tubercles on sparse ribs that may be round and strong, sharp and narrow, or absent. The suture is somewhat simpler that that of the Acanthoceratinae. Range is restricted to the lower Turonian stage of the Upper Cretaceous. Genera include: :''Mammites'' Laube & Bruden, 1886 :''Benueites'' Reyment 1954 :''Metasigaloceras'' Hyatt, 1903 :''Pseudoaspidoceras'' Hyatt, 1903 :''Watinoceras'' Warren,1930 The inclusion of ''Kamerunoceras'' Reyment, 1940, is doubtful. ==References== * W.J. Arkell, et al., Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology, Part L, Mollusca 4. Geological Society of America and University of Kansas Press. 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「Mammitinae」の詳細全文を読む スポンサード リンク
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