Order Diprotodontia Author Wilson, Don E. Author Reeder, DeeAnn text 2005 The Johns Hopkins University Press Baltimore Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 1 43 70 book chapter 0-8018-8221-4 10.5281/zenodo.7316519 Petrogale purpureicollis Le Souef 1924 Petrogale purpureicollis Le Souef 1924 , Aust. Zool., 3: 274 . Type Locality: Australia , NW Queensland , Dajarra. Vernacular Names: Purple-necked Rock-wallaby . Distribution: Australia : Dajarra district, NW Queensland . Conservation: Uncertain. Discussion: P. lateralis / penicillata species-group. Considered probably a species distinct from P. lateralis by Eldridge et al. (1991) .