|
| image = | regnum = Animalia | phylum = Mollusca | classis = Cephalopoda | subclassis = Ammonoidea | ordo = Ammonitida | subordo= Phylloceratina | familia = Phylloceratidae | subfamilia = Phylloceratinae | genus = ''Hypophylloceras'' | genus_authority = Salfeld, 1925 }} ''Hypophylloceras'' is a Cretaceous ammonite with a finely ribbed, compressed, involute shell; some having periodic stronger ribs or folds. The suture is complex, with large, asymmetric and finely divided lobes; the 1st lateral being much larger than the external (=ventral) and 2nd lateral lobes. Saddle endings commonly not phylloid. ''Hypophylloceras'' includes ''Neophylloceras'' Shimizu 1934 (=''Paraphylloceras'' Chimisu 1935 ), ''Hyporbulites'' Brestroffer 1947, ''Goretophylloceras'' Collingnon 1949 and ''Aphrotiticeras'' Mahmoud in Breister, 1952.〔 The type species ''Hypophylloceras ononense'', named by Salfeld in 1925 and based on ''Phylloceras ononense'' Santon 1895, comes from the Aptian of California. ==References== *Imlay 1960. Early Cretaceous (albian) Ammonites from the Chitina Valley and Talkeetna Mountains, Alaska. US Geological Survey PP 354-D *(''Hypophylloceras'' entry in the Paleobiology Database ) 5/02/12 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「Hypophylloceras」の詳細全文を読む スポンサード リンク
|