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Tranatocetus
''Tranatocetus'' is an extinct genus of mysticete from the late Miocene (Tortonian) of Jutland, Denmark. The type and only species is ''Tranatocetus argillarius''.
==Description==
''Tranatocetus'' is similar to ''"Aulocetus" latus'', ''"Cetotherium" megalophysum'', ''"Cetotherium" vandelli'', ''Mesocetus'', and ''Mixocetus'' in having rostral bones that override the frontals and contact the parietals, nasals dividing the maxillae on the vertex, a dorsoventrally bent occipital shield with a more horizontal anterior portion and more vertical posterior portion, and a tympanic bulla with short, narrow anterior portion with rounded or squared anterior end and wider and higher posterior portion that is particularly swollen in the posteroventral area. Like other tranatocetids, the skull vertex of ''Tranatocetus'' is X-shaped in dorsal view. However, ''Tranatocetus'' differs in having a wide skull with laterally expanded squamosals, straight ascending processes of maxillae which extend parallel to each other (rather than tapering and converging posteriorly), small lateral projection of the posterior meatal crest on the posterolateral side of the postglenoid process and paroccipital processes extending far posterior to the occipital condyles.
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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