@cooperj does this seem like a reasonable move? I will draft swaps for the individual species.

@cooperj @else @funkeytom any opinions on moving Hymenopellis into Oudemansiella at this point?

Good idea to deal with this one James. I agree with placing Hymenopellis and Cribbea under Oudemansiella, as Hymenopellis is not monophyletic and Cribbea is just a secotioid Oudemansiella (Lebel 2017).

Indeed, a classification consistent with molecular phylogeny, as suggested by @else Vellinga (2010) and adopted by Yang et al. (2009) and Qin et al. (2014), is to accept Xerula sens. strict. (for X. pudens and allies), Paraxerula and a broad Oudemansiella, which includes the genera: Cribbea, Dactylosporina, Hymenopellis (for Oudemansiella radicata and allies), Mucidula (for O. mucida and allies), Ponticulomyces and Protoxerula.

Qin, J., Hao, Y., Yang, Z.L. et al. (2014) Paraxerula ellipsospora, a new Asian species of Physalacriaceae. Mycol Progress 13, 639–647.

Lebel, T. (2017), Nomenclatural changes and corrections for some previously described Australasian truffle-like fungi (Basidiomycetes). Muelleria 36, 8-14
Vellinga EC. (2010) Review of “The Xerula/Oudmansiella complex (Agaricales)" by R.H. Petersen and K.W. Hughes. Mycotaxon 114, 494–495.
Yang ZL, Zhang LF, Mueller GM, Kost GW, Rexer K-H (2009) A new systematic arrangement of the genus Oudemansiella s. str. (Physalacriaceae, Agaricales). Mycosystema 28,1–13.

@cooperj - yes, I should update AusFungi as well