First person to use this name on MO: Nathan Wilson
Editors: Alan Rockefeller, Jacob Kalichman
Observations of:
Rank: Species
Status: Accepted
Name: Nolanea holoconiota
Author: Largent & Thiers
Citation:
Synonym(s):Entoloma holoconiotum (Largent & Thiers) Noordel. & Co-David
Domain: Eukarya
Kingdom: Fungi
Phylum: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Entolomataceae
Genus: Nolanea
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Co-David, D., Langeveld, D. & Noordeloos, M.E. (2009). Molecular phylogeny and spore evolution of Entolomataceae. Persoonia 23: 147-176.
Transfer on page 169.

Based on the molecular evidence presented by Co-David et. al. and discussed on the Leptonia page, Nolanea should be considered a synonym of Entoloma at least until more analysis is done and the description of this genus is revised to describe a monophyletic group.
However, this particular species has never been transferred to Entoloma, so this is the only name available for use.
Not everyone agrees that all Nolanea should be Entoloma.