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Abstract
The genus Cryptadelphia (Trichosphaeriales) is described for the presumed teleomorphs of six species of the dematiaceous hyphomycete genus Brachysporium. Cryptadelphia is characterized by the production of dark, leathery perithecia with two-layered walls, cylindrical, long-stipitate asci with eight hyaline, initially aseptate but ultimately 1-septate as-cospores. Zignoëlla groenendalensis is transferred to Cryptadelphia with Wallrothiella melanostigmoides as a synonym. Five new species, i.e., Cryptadelphia abietis, C. brevior, C. obovata, C. pendulispora and C. polyseptata, with their respective Brachysporium anamorphs, are described and illustrated. Phylogenetic analysis of partial large subunit rDNA sequences of two species supports the monophyly of Cryptadelphia and suggests a relationship with the Trichosphaeriales. The monophyly of the Trichosphaeriaceae and the relationships between the Trichosphaeriaceae, Annula-tascaceae and the Sordariales can be questioned, but a conclusive assessment requires phylogenetic analysis of more related taxa. The genus Wallrothiella is redescribed based on new collections of W. congregata and is characterized by the production of tiny, globose ascospores in cylindrical asci. The new collection is proposed as a neotype for the genus.
This project was partly supported by the Grant Agency of Academy of Sciences (GAAV B6005106) and COBICE project to M.R. We thank these herbaria for their loan of the type and other material: C, BR, DAOM, G, H, K, LUX, PAD, PC, STRC, UPS. We are grateful to Gerry Louis-Seize for the sequences of C. groenendalensis, Sarah Hambleton for advice on sequencing and phylogenetic analysis, Jacques Fournier for collecting the specimens of W. congregata and Robert A. Shoemaker and S. Hambleton for reviews of the manuscript.