Dothideomycetes » Dothideomycetes, genera incertae sedis


Citation: Pem D et al. (2019) Mycosphere Notes 275-324: A morphotaxonomic revision and typification of obscure Dothideomycetes genera (incertae sedis). Mycosphere 10(1), 1115–1246


Bryorella Döbbeler, Mitt. bot. StSamml., Münch. 14: 128 (1978)

Saprobic or parasitic on leaves or the stem of wood moss (Hylocomiaceae) in terrestrial habitat. Sexual morph: Ascomata erumpent to completely superficial, solitary, spherical, globrous, dark brown to black, short papillate. Peridium wall composed of 2 layers, an outer layer comprising small, heavily pigmented, thick-walled cells of textura angularis and an inner layer comprising lightly pigmented to hyaline, thin-walled cells of textura angularis. Hamathecium of dense, filamentous, branching, anastomosing, non-septate, hyaline pseudoparaphyses. Asci 8-spored, cylindrical, with a short pedicel or sessile, rounded at the apex, with an ocular chamber, sometimes bulbous expanded below. Ascospores uniseriate, elongated, ellipsoidal or rarely spindle, constricted at septa, 3–7-transversely septate, obtuse apex, sometimes narrow below, hyaline when immature to dark brown when mature, thick-walled, smooth. Asexual morph: Undetermined.


Type species Bryorella acrogena Döbbeler


NotesBryorella was introduced by Döbbeler (1978) with nine species namely, B. acrogena, B. compressa Döbbeler, B. crassitecta Döbbeler, B. cryptocarpa Döbbeler, B. erumpens Döbbeler, B. gregaria Döbbeler, B. punctiformis Döbbeler & Poelt, B. retiformis Döbbeler & Poelt and B. semi-immersa Döbbeler, with B. acrogena as the type species. Bryorella acrogena was found on Hylocomium splendus in Austria. Since then, two more species were added (Döbbeler 1981, 1982, 2007). Li et al. (2014) re-examined the type species of Bryorella and described the genus as characterized by superficial, disseminated, glabrous, small, ascomata with a cellular peridium, hyaline ascospores and a hymenium lacking a reaction in iodine (Li et al. 2014). However, the author did not observe any asci and ascospores and placed the genus in Dothideomycetes, genera incertae sedis. We re-examined another specimen from UME and found different morphological characters such as elongated ellipsoidal brown ascospores instead of hyaline ascospores as described by Li et al. (2014).

The taxon has narrow, anastomosing pseudoparaphyses that are typical of Melannomataceae (Tian et al. 2014), and it might be placed in this family. Liew et al. (2000) however, showed that such structures were only significant at the genus or species level. We therefore retain the genus in Dothideomycetes genera incertae sedis, until fresh specimens are collected and re-examined.



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