Rhizophascolonus

{{Short description|Extinct genus of marsupials}}

{{Automatic taxobox

| fossil_range = Late Oligocene-Early Miocene

| taxon = Rhizophascolonus

| authority = Stirton et al., 1967

| subdivision_ranks = Species

| subdivision =

• R. crowcrofti Stirton et al., 1967.{{cite journal |last1=Stirton |first1=R. A. |last2=Tedford |first2=Richard H. |last3=Woodburne |first3=Michael O. |title=A new Tertiary formation and fauna from the Tirari Desert, South Australia |journal=Records of the South Australian Museum |date=1967 |volume=15 |issue=3 |pages=427–462 |url=https://www.biodiversitylibrary.org/part/262888}}
• R. ngangabaBrewer et al., 2018

}}

Rhizophascolonus is an extinct genus of wombat known from the Early Miocene of South Australia.Additional specimens of the oldest wombat, Rhizophascolonus crowcrofti (Vombatidae; Marsupialia) from the Wipajiri Formation, South Australia: an intermediate morphology? J. Vert. Paleo. 28: 1144 ([http://www.bioone.org/doi/abs/10.1671/0272-4634-28.4.1144 link] The genus was first described to accommodate Rhizophascolonus crowcrofti, in 1967. A discovery at Riversleigh was published as another new species in 2018, Rhizophascolonus ngangaba, and further specimens from this area were assigned to R. crowcrofti in the same study.{{cite journal |last1=Brewer |first1=Philippa |last2=Archer |first2=Michael |last3=Hand |first3=Suzanne |last4=Price |first4=Gilbert |author1-link=Philippa Brewer |author2-link=Mike Archer (paleontologist) |author3-link=Suzanne Hand |title=A new species of Miocene wombat (Marsupialia, Vombatiformes) from Riversleigh, Queensland, Australia, and implications for the evolutionary history of the Vombatidae |journal=Palaeontologia Electronica |date=2018 |doi=10.26879/870|doi-access=free |hdl=10141/622528 |hdl-access=free }}