Dothideomycetes » Dothideomycetes, genera incertae sedis


Dawsomyces Döbbeler, Mitt. bot. StSamml., Münch. 17: 426 (1981).

Index Fungorum number: IF 1426; Facesoffungi number: FoF 12183, 2 morphological species (Species Fungorum 2022), no molecular data available.

Saprobic on host. Sexual morph: Ascomata merged between the lamellae, hyaline, glabrous, seen above with a narrowly elliptic or fusiform outline, irregularly margined at the base. Excipule reduced, unordered algal cells beneath the hymenium, similar to individual paraphysoid cells on the sides. Paraphysoid filiform, sparse, gelatin enclosed. Asci bitunicate, claviform or ellipsoidal to sometimes subcylindrical, broadly rounded at the apex, tapering, 8-spored, J - or gelatin on the lower part. Ascopores attenuate ellipsoidal to almost fusiform, bicellular, hyaline, rarely constricted to the septum, smooth episporium. Hyphae not colored, superficial. Appressoria always singularly densely pressed with cells of the hyphae, cells equal in size and shape more or less radiate with very fine striate. Asexual morph: Unknown (adapted from Döbbeler 1981).

 Type species: Dawsomyces mirabilis Döbbeler

Notes: Dawsomyces is characterised by hyaline, glabrous ascomata, filiform, sparse paraphysoid, claviform or ellipsoidal to sometimes subcylindrical asci and attenuate ellipsoidal to almost fusiform, hyaline ascospores. Molecular data is lacking for Dawsomyces and there is no current update on this genus. Fresh collections with DNA sequence data are needed to confirm the generic placement of Dawsomyces.


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