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Gleviceras
''Gleviceras'' is an ammonite genus (order Ammonitida) that lived during the Early Jurassic Period, found in Canada, Hungary, Mexico and the United Kingdom. ''Glevumites'' Buckman 1924, ''Guibaliceras'' Buckman 1918, ''Riparioceras'' Schindewolf 1962, ''Tutchericeras'' Buckman 1919, and ''Victoriceras'' Buckman 1918 are considered synonyms. ==Description== ''Gleviceras'' produced laterally compressed involute shells with a small umbilicus, close spaced sinuous ribbing, and a sharp keel along venter. The suture in ammonitic with deep narrow complex lobes. It is similar to ''Oxynoticeras'' except for being less narrow and having a more rounded venter. ''Fastigiceras'' differs primarily in having an occluded unbilicus.
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「Gleviceras」の詳細全文を読む
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