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''Pappocetus'' is an extinct protocetid cetacean known from the Eocene of Nigeria and Togo.〔. Retrieved April 2013.〕 The type specimen BMNH M11414 an incomplete left mandible with symphysis, a deciduous premolar, and unerupted molars. It was found in Bartonian () layers of the Ameki Formation (, paleocoordinates )〔. Retrieved April 2013.〕 in southern Nigeria.〔〔. Retrieved April 2013.〕 The specimen M11086 is a left mandibular ramus broken in three pieces with sockets for canines and incisors and the front part of a single-rooted P1. Andrews, to whom the two specimens were brought separately, noted that they "to some extent supplement one another, so that the structure is fairly clear" and thus estimated the size and morphology of the missing parts by comparing the specimens to each other. ''Pappocetus'' differs from all other known protocetid genera by the step-like notch on the ventral margin of the mandible below M2 and M3; from ''Indocetus'' and ''Rodhocetus'' by the deciduous double-rooted P1; from ''Protocetus'' and ''Babiacetus'' by the presence of accessory cuspules; and from ''Babiacetus'' by the unfused symphysis terminating just before P3. Its molar morphology is similar to ''Georgiacetus'' and its estimated body size to that of ''Eocetus''.〔 The species is named after Sir Frederick Lugard who sent one of the specimens to Andrews. ==Notes== 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「Pappocetus」の詳細全文を読む スポンサード リンク
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