Nambaroo, Flannery and Rich, 1986

Butler, Kaylene, Travouillon, Kenny J., Price, Gilbert J., Archer, Michael & Hand, Suzanne J., 2018, Revision of Oligo-Miocene kangaroos, Ganawamaya and Nambaroo (Marsupialia: Macropodiformes, Balbaridae), Palaeontologia Electronica (8 A) 21 (1), pp. 1-58 : 20

Genus NAMBAROO Flannery and Rich, 1986

Type Species. Nambaroo tarrinyeri Flannery and Rich, 1986 , by original description.

Emended generic diagnosis. Species of Nambaroo differ from all other balbarids in having the following combination of features: a short buccally flexed p3 with six to eight cuspids; a more plagiaulacoid p3 form; a poorly developed hypocingulid on the m1; a pronounced lingual cingulum on P3; possession of a neometaconule and postlink; a well-developed postprotocrista that does not extend into the interloph valley on M1.

Remarks. Nambaroo was first described by Flannery and Rich (1986) to accommodate three species characterised as differing from other balbarids ( Ganawamaya was not described at the time) by having a protostylid on m1, lacking a well-developed posterior cingulid on lower molars, and possessing a posthypocristid on the m1. Species of Nambaroo differ from Balbaroo in having noticeably smaller molars, a poorly developed midlink, and in lacking a well-developed hypocingulid on all lower molars. As previously discussed, our study demonstrates that the protostylid, a defining character in the generic diagnosis of Nambaroo ( Flannery and Rich, 1986) is present in species of Ganawamaya as well as Nambaroo . However, Nambaroo species do differ from Ganawamaya species in having a more plagiaulacoid molar form as opposed to rectilinear, a more developed preprotocrista and postprotocrista, and possession of a postlink and neometaconule.