Figure 21 in Herpetocetus morrowi (Cetacea: Mysticeti), a new species of diminutive baleen whale from the Upper Pliocene (Piacenzian) of California, USA, with observations on the evolution and relationships of the Cetotheriidae

Figure 21. Herpetocetus morrowi sp. nov., SDNHM 38689, right referred petrosal. A, dorsal view; B, ventral view; C, lateral view; D, medial view; E, anterior view; F, posterior view. Abbreviations: A, anterior; APP, anterior process of the petrosal; APTB, anterior pedicle for attachment of the tympanic bulla; D, dorsal; EAM, external auditory meatus; ELF, endolymphatic foramen; FNC, endocranial opening of the facial nerve canal; FR, fenestra rotunda; FV, fenestra vestibuli; LP, lateral projection of the anterior process; M, medial; P, posterior; PC, pars cochlearis; PLF, perilymphatic foramen; SMF, stylomastoid fossa; V, ventral. Scale bar = 1 cm.