Phaeotrichales » Phaeotrichaceae

Trichodelitschia

Trichodelitschia Munk, Dansk bot. Ark. 15(no. 2): 109 (1953).

Index Fungorum number: IF 5552; Facesoffungi number: FoF 08134, 5 morphological species (Species Fungorum 2022), 2 species with molecular data.

Saprobic on host. Sexual morph: Pseudothecia scattered, immersed to semi-immersed, sometimes superficial, subglobose to pyriform, semitransparent and membranaceous below the substrate, to black, opaque and coriaceous above the substrate. Neck short, stout, cylindrical to subcylindrical, black and opaque, with straight dark brown to black spiny appendages, slightly bulbous at the base. The spiny appendages restricted to the neck region, lower part of the pseudothecia naked or with a very few thin light brown sparsely septate rhizoid-type hairs. Pseudothecial cells thin-walled, irregular to angular, dark brown, opaque. Asci 8-spored, cylindrical, rounded at the apices, narrowing below to form a long stipe. Paraphyses slender, filiform, septate, hyaline, as long as the asci. Ascospores obliquely, uniseriately arranged, ellipsoid to oblong and slightly irregular, transversely uniseptate, constricted and separable at the septa, hyaline when young becoming brown to dark brown and opaque; with hyaline raised apophyses and apical germ pores. Ascospores surrounded by a thick gelatinous sheath when immature which often disappears or is very thin at maturity. Exosporium of mature ascospores dark. Asexual morph: Unknown (adapted from Ebersohn and Eicker 1992).

 Type species: Trichodelitschia bisporula (P. Crouan & H. Crouan) Munk

Notes: Trichodelitschia is characterised by scattered, immersed to semi-immersed pseudothecia, 8-spored, cylindrical asci and ellipsoid to oblong and slightly irregular ascospores surrounded by a thick gelatinous sheath. Trichodelitschia bisporula was previously known as Hormospora bisporula but was not congeneric with the type species of Hormospora. Munk (1957) placed Trichodelitschia in Sporormiaceae. Lundqvist (1964) transferred Trichodelitschia to Phaeotrichaceae based on the dark thick-walled spiny appendages, dark two-celled ascospores with hyaline to subhyaline tenninal apophyses and circular germ pores at the spore apices. This treatment was followed by subsequent authors (Luck-Allen 1970; Eriksson and Hawksworth 1988; Parguey-Leduc 1974; Barr 2000). Trichodelitschia was initially invalid as the binomial was not completely cited and the genus was validated by Lundqvist (1964). Lundqvist (1964) also described T. munkii. Luck-Allen (1970) and Welt and Heine (1972) added additional species to Trichodelitschia. Ebersohn and Eicker (1992) described T. microspora from dung of Giraffa camelopardalis (Giraffidae) in South Africa. Kruys and Wedin (2006) confirmed the placement of Trichodelitschia in Phaeotrichaceae based on phylogenetic analysis of nSSU, nLSU and mtSSU rDNA sequence data. Trichodelitschia is morphologically and phylogenetically a distinct genus in Phaeotrichaceae. Molecular markers available for Trichodelitschia are SSU, mtSSU, for T. munkii is LSU and for T. bisporula are ITS, LSU, SSU, RPB2 and TEF-1.

 

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