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Eomysticetidae : ウィキペディア英語版
Eomysticetidae

Eomysticetidae is a family of extinct mysticetes belonging to Chaeomysticeti (toothless mysticetes). It is one of two families in the basal chaeomysticete clade Eomysticetoidea (the other being Cetotheriopsidae).
==Description==
Eomysticetids are united by the following combination of primitive and derived characters relative to more advanced chaeomysticetes (Balaenomorpha): zygomatic process without a supramastoid crest; reduction of the superior process of the periotic into a low ridge with anterior and posterior apices in medial or lateral view; blowholes situated ahead of the eyes; an elongated intertemporal region with long parietal and frontal exposures on the cranial vertex; elongated nasals; large coronoid processes of the mandibles; flat rostrum; laterally bowed mandibles; absence of functional teeth; and large mandibular foramina.〔Berta, A. and T.A. Deméré. (2009). Mysticetes, Evolution, pp. pp. 749-753, Encyclopedia of Marine Mammals (W.F. Perrin, B. Wursig, and J.G.M. Thewissen, eds.), 2nd ed., Academic Press, San Diego, CA.〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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