Fig. 18. Thryonomys swinderianus AMNHM 216340 in Basicranial Morphology And Relationships Of Antillean Heptaxodontidae (Rodentia, Ctenohystrica, Caviomorpha)

Fig. 18. Thryonomys swinderianus AMNHM 216340, left auditory region; stereopair view (with key) in ventrolateral aspect. Like all phiomorphs, cane rats lack an evident aperture for the posttympanic ramus (see text). The tympanic fenestra is absent as such, as are any apparent perforations for meatal innominate vessels. Hatchure indicates damage.