is shown growing on the same substrate (termite nest) on pp. 238-239 in:
Guzman, Gaston and M. Piepenbring. Los Hongos de Panama. Introduccion a la Identificacion de los Macroscopicos. 2011. 798 col. photogr. XIV, 372 p. 4to. Hardcover.
though it looks to be much more pink and erect than this.
The head scratching continues…