| 翻訳と辞書 |
| Medlicottiinae ： ウィキペディア英語版 |
Medlicottiinae
The Medlicottiinae a subfamily of the Medlicottiidae, a family of ammonoid cephalopods included in the Prolecanitida, characterized by having discoidal to thinly lenticular shells with a retuse (grooved) venter and sutures with bifid auxiliary lobes.
The Medlicottiinae includes, by general consensus〔(Medlicottiinae -Paleobio )〕 the following five genera: ''Artinskia'', ''Eumedlicottia'', ''Medlicottia'', ''Neogeoceras'', and ''Syrdenites''. Of these only ''Artinskia'' and ''Medlicottia'', included in the Medlicottinae in the Treatise (Miller, Furnish, and Schindewolf, 1957) remain. ''Episageceras'', ''Propinacoceras'', and ''Sicanites'', then included, have become type genera respectively for the Episageceratinae, Propinacoceratinae, and Sicanitinae.
''Artinskia'' is the ancestral form, thought to be derived from ''Uddenoceras'' (Uddenitinae), which gave rise to the type genus ''Medlicottiia''. ''Medilicottia'' then gave rise to ''Eumedlicottia'' and ''Neogeoceras''.〔Saunders et al, 1999. Evolution of Complexity in Paleozoic Ammonoid Sutures. Supplementary Material. ().〕 The derivation of ''Syrdenites'' is uncertain.
==''References''==
*Miller, Furnish, and Schindewolf, 1957. Paleozoic Ammonoidea (Prolecanitina); Treatise on Invertebrate Paleontology, Part L,(Ammonoidea). Geol Soc of America and Univ Kansas Press.
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「Medlicottiinae」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.
|
|