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 Wyulda Alexander 1918 Wyulda Alexander 1918 , J. R . Soc. West. Aust., (1917-1918), 4: 31 . Type Species: Wyulda squamicaudata Alexander 1918 Species and subspecies: 1 species: Species Wyulda squamicaudata Alexander 1918 Discussion: Provisionally combined with Trichosurus by Flannery et al. (1987) . Norris (1994) confirmed, on examination of the type of W. squamicaudata , that the two genera are closely related.