Name: Macrocybe titans (H.E. Bigelow & Kimbr.) Pegler, Lodge & Nakasone
Most Confident Observations:
Copyright © 2007 El Colegio de la Frontera Sur (Ecosur)
Copyright © 2017 Logan Wiedenfeld (LoganW)
Copyright © 2017 Logan Wiedenfeld (LoganW)
Copyright © 2016 Logan Wiedenfeld (LoganW)
Version: 2
Previous Version 

First person to use this name on MO: Nathan Wilson


Rank: Species

Status: Accepted

Name: Macrocybe titans

ICN Identifier: missing

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Author: (H.E. Bigelow & Kimbr.) Pegler, Lodge & Nakasone

Citation: Mycologia 90(3): 500 (1998)

Deprecated Synonyms: Tricholoma titans H.E. Bigelow & Kimbr.


Domain: Eukarya

Kingdom: Fungi

Phylum: Basidiomycota

Class: Agaricomycetes

Order: Agaricales

Family: Biannulariaceae

Genus: Macrocybe

Brief Description: [See More | Edit]

This species was originally described as T. titans from Florida, U.S.A. (Bigelow and Kimbrough, 1980), and was described again as T. cystidiosum from Mexico (Cifuentes and Guzmán, 1981). Later, Courtecuisse (1985) renamed T. cystidiosum as T. cifuentesii because the former was a homonym, and Singer (1990) synonymized it with T. titans. Macro- cybe titans is mainly distinguished macroscopically by the distinctly squamose stipe surface, and microscopically by the numerous, refractive pseudocystidia. This is the fungus previously reported under the name of T. pachymeres (Berk. & Broome) Sacc., by Baker and Dale (1951: 94, pl. lg) and Pegler (1983: 111, pl. 3D). The habit of the Costa Rican collections of growing from active Atta ant gardens is distinctive. Except for the presence of cheilocystidia on some of the Costa Rican collections, they were indistinguish- able from other collections of M. titans.

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