|
|taxon = Creniceras |authority= Munier-Chalmas,1892 |subdivision_ranks=Species |subdivision= see text }} ''Creniceras'' is a rather small Upper Jurassic〔 ammonite with a shell in the range of about 1.6 cm in diameter,(about 1/2 in). The shell of ''Creniceras'' is eccentrically coiled, compressed, and generally smooth, except for a median row of cockscomb serrations on the body chamber and the possibility of blunt ribbing on the sides. ''Creniceras'', named by Munier-Chalmas in 1892, is included in the oppeliid subfamily Teramelliceratinae, and has been found in Upper Jurassic (Oxfordian age) sediments in Europe and Syria. ==References== Arkell ''et al'', 1957. Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology Part L. Geological Society of America and Univ. Kansas Press. p. L282. 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「Creniceras」の詳細全文を読む スポンサード リンク
|