Dacampia
Dacampia A. Massal., Sulla Lec. Hook. Schaer.: 7 (1853).
Index Fungorum number: IF 1401; Facesoffungi number: FoF 08196, 14 morphological species (Species Fungorum 2022), 2 species with molecular data.
Lichenicolous or lichenized with Coccomyxa and external cephalodia with Nostoc. Sexual morph: Ascomata perithecioid, with a central ostiole, lacking setae, black, immersed to semi-immersed, with a pseudoparenchymatic ascomatal wall, in longitudinal section seen as a textura angularis with thick-walled, reddish to dark brown cells. Hamathecium of interascal filaments (paraphysoids) with ramifications and anastomoses. Asci bitunicate, subcylindrical, apically thickened when mature, with a small, sometimes indistinct, ocular chamber, 8-spored, ascal wall and hymenial gel I–, more rarely K/I+ bluish. Ascospores 1–2-seriate, pale brown to dark brown, pigmented from an early stage of development, muriform, ellipsoid to fusiform, often constricted at the septa, smooth, without visible gelatinous sheath. Asexual morph: Unknown (adapted from Ertz et al. 2015).
Type species: Dacampia hookeri (Borrer) A. Massal.
Notes: Dacampia is characterised by perithecioid ascomata, subcylindrical asci and pale brown to dark brown, muriform, ellipsoid to fusiform ascospores lacking a gelatinous sheath. Dacampia is heterogeneous, as some lichenicolous taxa do not form thallus structures but these species lack sequence data. Dacampia resembles other genera in Dacampiaceae (syn. Pyrenidiaceae) such as Clypeococcum, Polycoccum, Pyrenidium and Weddellomyces but have subtle differences. Dacampia resembles Polycoccum and Pyrenidium in having same ascomatal structure and wall tissues but differs in that the latter two genera have 1-trans-septate or more than 1-trans-septate ascospores, respectively. Dacampia differs from Clypeococcum in that the latter has 1-trans-septate ascospores and the ascomatal wall tissue is hyphal while Dacampia has pseudoparenchymatic ascomatal wall. Dacampia differs from Weddellomyces in that the latter has ascospores which are trans-septate or muriform. Dacampia is morphologically and phylogenetically a distinct genus in Dacampiaceae but only two species have just LSU molecular data.
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