part of part of has part has part in taxon microvillous olfactory receptor neuron Rodentia olfactory epithelium olfactory gland septal olfactory organ septal organ of Masera SO of Masera This olfactory apparatus has been observed in many mammals, including rat, mouse, hamster, deer mouse, rabbit, opossum, guinea pig, bandicoot, and koala (Rodolfo-Masera 1943; Adams and McFarland 1971; Bojsen-Moller 1975; Katz and Merzel 1977; Breipohl et al. 1983, 1989; Kratzing 1984a, 1984b; Taniguchi et al. 1993), but not in cat (Breipohl et al. 1983) or ferret (Weiler and Farbman 2003) EMAPA:35766 UBERON:0015246 A small island of olfactory neuroepithelium lying bilaterally at the ventral base of the nasal septum near the entrance of the nasopharynx. MA:0002890