|
''Homoadelphoceras'' is a gyroconic rutoceratid Nautiloid from the Middle Devonian of central Europe. Whorls not in contact, venter and dorsum, (outer and inner rims), broadly rounded. Dorso-lateral and ventro-lateral flanks more or less flat, meet at an angle. ''Homoadelphoceras'' resembles ''Adelphoceras'' which differs in that its whorls are in contact, producing an impressed zone on the inner rim, or dorsum. Both are close to their oncocerid ancestors in that their siphuncles contain laminar actinosiphonate deposits. ==References== * Bernard Kummel, 1964. Nautiloidea - Nautilida; Treatise on Invertebrate Paleontology, Part K. Geological Society of America. * (Homoadelphceras ) in Fossilworks. 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「Homoadelphoceras」の詳細全文を読む スポンサード リンク
|