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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Polazzodus ： ウィキペディア英語版 Polazzodus ''Polazzodus'' is an extinct pycnodontid from the late Cretaceous (early Santonian) of the Polazzo locality of northeastern Italy. The paleoenvironment of Polazzo was a large marine carbonate platform and shallow internal lagoons formed from rudist reefs. ''P. coronatus'' is known from a large number of specimens, many of which were very well preserved. The new genus ''Polazzodus'' was erected based on a number of autapomorphies that distinguished it from similar pycnodontid fish. These include a second dorsal ridge scale (from which the Latin species name, ''coronatus'', is derived), presence of olfactory fenestra on premaxilla, posterodorsal process on cleithrum, and several others. The largest measured recovered specimen was 97 mm (3.8 in), and the smallest was 30 mm (1.2 in), which represented a subadult specimen. ''Polazzodus'', being a low-bodied pycnodont, is most similar morphologically to ''Pycnodus'' and ''Tergestrinia'', though its body shape is more oval than these genera. ==References== 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「Polazzodus」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.