The taxonomy for this group of fungi is not clear. It would appear that there is more than one species and so to cover this the species has 'group' after it's scientific name.
Oudemansiella gigaspora group is listed in the following regions:
Canberra & Southern Tablelands | Southern Highlands | South Coast | Hunter Region | New England | Gippsland | Tasmania
Synonyms
Oudmansiella radicata, Xerula radicata, X. radicata var. australis Oudemansiella 'radicata group'Places
The Pilliga, NSW