翻訳と辞書 |
Planitornoceras : ウィキペディア英語版 | Planitornoceras
''Planitornoceras'' is a genus included in the geniatitid subfamily Aulatornoceratinae that lived during the Famennian stage at the end of the Devonian. Its shell is extremely compressed, subinvolute to subevolute with an open umbilucus. Sides are always flat, outer rim (=venter) tabulate to slightly keeled. No constrictions or spiral grooves, but some species have broad spiral depressions. The adventitious lobe of the suture is widely rounded and asymmetric, the ventral lobe and saddle small, the dorsolateral saddle relatively short. ==References==
*''Planitornoceras'' in (GONIAT Online ) 6/9/12 *(The Paleobiology Database ''Planitornoceras'' entry ) accessed 9 June 2012
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「Planitornoceras」の詳細全文を読む
スポンサード リンク
翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|