Truffles (and two parasites)

Truffles, as a group are not all phylogenetically related---they share an ecological niche and have a convergent macromorphology. At present, we know of the following taxa. Also included here are two species of Cordyceps that parasitize Elaphomyces.
Alpova diplophloeus (Zeller & Dodge) Trappe & A. H. Sm. Melanogaster sp. nov.
Elaphomyces variegatus Vitt. Hysterangium sp. nov.
Hydnotrya tulasnei (Berk.) Berk. & Br. Zelleromyces sp.
Ophiocordyceps longisegmentis (Ginns) G.H. Sung, J.M. Sung & Spatafora Ophiocordyceps ophioglossoides (Ehrh.) G.H. Sung, J.M. Sung & Spatafora
Vouchers for all collections are on deposit at the Universidad de Costa Rica (USJ) mycological herbarium.
Duplicates are in the Field Museum (F) and the New York Botanical Garden (NY).