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Falcitornoceratinae : ウィキペディア英語版 | Falcitornoceratinae
Falcitornoceratinae is one of three subfamilies of the Tornoceratidae family, a member of the Goniatitida order. Shells produced are extremely involute and have no umbilicus. Young and intermediate whorls have ventrolateral grooves. The adventitious lobe, which develops ontogenetically between the external, or ventral, and lateral lobes, is widely rounded. Tornoceratids in which the Falcitornoceratinae are included are involute, subdiscoidal, with sutures that form 6 to 10 lobes. ==References==
*Falcitornoceratinae in (GONIAT ) 6/9/12 *( Falcitornoceratinae ) in Paleobiology Database, 6/9/12
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「Falcitornoceratinae」の詳細全文を読む
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