Nimbadon Hand et al., 1993

Black, Karen H. & Hand, Suzanne J., 2010, First Crania and Assessment of Species Boundaries in Nimbadon (Marsupialia: Diprotodontidae) from the Middle Miocene of Australia, American Museum Novitates 3678, pp. 1-60 : 6

Nimbadon Hand et al., 1993

TYPE SPECIES: Nimbadon lavarackorum Hand et al., 1993 .

ADDITIONAL SPECIES: Nimbadon whitelawi and N. scottorrorum Hand et al., 1993 .

REVISED GENERIC DIAGNOSIS: Nimbadon species differ from all other zygomaturines in having: a broad, short rostrum; a dorsolaterally inflated premaxilla; a small lacrimal foramen; a slender, moderately elongate masseteric process; a sphenopalatine foramen that is well separated from the infraorbital canal; and a P3 with a small parastyle and (variably present) hypocone and undifferentiated parametacone.

Nimbadon spp. differ from all other zygomaturines except species of Silvabestius Black and Archer, 1997 , in having: a weak suborbital shelf; a mildly inflated hypotympanic swelling; a grooved, winglike, short, ventral alisphenoid tympanic process; a large epitympanic fenestra; a delicate, short postglenoid process; a narrow, lanceolate i1; a distinct premetacristid on m1; and more anteriorly convex lophs on the upper molars.

Nimbadon spp. differ from all other zygomaturines except species of Silvabestius and Raemeotherium yatkolai Rich et al., 1978 , in having a molar gradient that does not increase posteriorly along the molar row.