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United States Department of Agriculture

Agricultural Research Service

Polyporicolous species of Hypomyces
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Rogerson, C.T., and Samuels, G.J. 1993. Mycologia 85: 231-272

Abstract: Nineteen species of Hypomyces (Ascomycotina, Hypocreales, Hypocreaceae) occur on members of the Aphyllophorales (Basidiomycotina, Hymenomycetes). Five new species, viz. H. amaurodermatis, H. lanceolatus, H. mycophilus, H. pergamenus, and H. sympodiophorus are described. Thirteen species have a proven anamorph, one species has an associated anamorph; no anamorph can be linked to six species. The anamorphs are hyphomycetes and have been previously distributed among the anamorph genera Arnoldiomyces, Cladobotryum, Dactylaria, Dactylium, Eurasina, Hansfordia, Moeszia, Pseudohansfordia, Septocylindrium, Sibirina, Sympodiophora, Trichothecium. The patterns of branching, arrangement of conidiogenous loci, or the number and arrangement of conidia on the conidiogenous cell, which is a reflection of proliferation of the conidiogenous cell, are not significant as generic determinants when seen in the light of the apparent phylogenetic homogeneity of their teleomorphs. Most of the species that are anamorphs of Hypomyces are placed in Cladobotryum. The anamorph of H. chrysostomus is referred to Acremonium. Chlamydosporic synanamorphs (Blastotrichum) have been linked to six species.
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Key Words: Hypomyces, Hypocreaceae, Aphyllophorales, Fungi Imperfecti, Moniliaceae

Introduction

This is the third in a series of publications of monographic studies of Hypomyces (Fries) L.-R. Tulasne (1860) (Hymenoascomycetes, Hypocreales). In earlier papers we described the species that occur on discomycetes (Rogerson and Samuels, 1985) and on boletes (Rogerson and Samuels, 1989).

Species of Hypomyces can be divided along the lines of their substrata, with the vast majority found on boletes, agarics, or polypores and with little overlapping among the broad substratum groups. More species of Hypomyces occur on members of the Aphyllophorales than on any other host group. Nineteen species, five of them new species, are recognized as occurring on polypores and other members of the Aphyllophorales; 10 names are placed in synonymy. In contrast to most agaricicolous (Rogerson, 1950; Helfer, 1991) and boleticolous (Rogerson and Samuels, 1989; Helfer, 1991) species of Hypomyces, those occuring on polyporaceous fungi, for the most part, are not host specific (see also Helfer 1991). Some appear to be restricted to members of the Polyporaceae (sensu latiore), a few others appear to be host specific, e.g., Hypomyces albidus on Stereum sanguinolentum, H. polyporinus on Trametes virsicolor. Others occur on a wide range of genera and species of diverse families in the Aphyllophorales, particularly in the Stereaceae; some also occur rarely on members of the Agaricales, jelly fungi, and on ascomycetes. A few are sometimes found on nonfungous substrata such as bark and wood (e.g., H. rosellus, H. tegillum). In general, proven anamorphs of Hypomyces species are found on a wider diversity of hosts than their teleomorphs.


Last Modified: 2/29/2012