Figure 6 in Arktocara yakataga, a new fossil odontocete (Mammalia, Cetacea) from the Oligocene of Alaska and the antiquity of Platanistoidea

Figure 6 Skull details & sinus system of Arktocara yakataga (USNM 214830). (A) Illustrated detail of right ventrolateral skull with low opacity mask, interpretive line art, and labels for skull elements. Dotted lines indicate uncertainty of sutures and hatched lines indicate sediment obscuring the fossil. Arrows indicate anatomical direction, with a, anterior and l, left lateral. (B) Illustrated detail of right ventrolateral skull with low opacity mask, interpretive line art, and blue highlighted areas indicating fossa for lobes of the sinus system.