Kirschsteiniotheliales » Kirschsteiniotheliales genera incertae sedis


Brachysporiella Bat., in Batista & Vital, Bol. Secr. Agric. (Pernambuco) 19(1-2): 108 (1952).

Index Fungorum number: IF 7443; Facesoffungi number: FoF 11933, 11 morphological species (Species Fungorum 2022), 1 species with molecular data.

Saprobic on host. Sexual morph: Unknown Asexual morph: Mycelium immersed and superficial, composed of septate, straight to sinuous, brown, smooth hyphae. Conidiophores macronematous, irregularly branched, erect, cylindrical, brown, smooth. Conidiogenous cells integrated, terminal, mono- and polyblastic, cylindrical to clavate, brown, smooth-walled. Conidia solitary, 2–4-septate, covered with a mucilaginous sheath, obovoid, clavate to pyriform, with a base rounded or truncate, brown, upper cell darker, smooth, often with a portion of the conidiogenous cell attached to the base of the conidia when these are released (adapted from Hernández-Restrepo et al. 2017).


Type species: Brachysporiella gayana Bat.


Notes: Brachysporiella is characterised by immersed and superficial mycelium, macronematous, irregularly branched, erect, cylindrical, brown conidiophores, and solitary, 2–4-septate conidia surrounded by a mucilaginous sheath. Brachysporiella resembles Monotosporella in having basal rhizoids and subglobose conidia but the relationship between these two genera is doubtful (Hughes 1958). Ellis (1959) considered Monotosporella as a synonym of Brachysporiella. Unfortunately, the type material of both genera is lost and not available for re-examination. Réblová et al. (2016) transferred M. setosa to Pleurotheciales (Sordariomycetes) while some other monotosporella-like asexual morphs are reported for Ascotaiwania species (Ranghoo & Hyde 1998, Sivichai et al. 1998). In the phylogenetic study of Hernández-Restrepo et al. (2017), Brachysporiella navarrica formed a sister lineage with members of the family Kirschsteiniotheliaceae and the authors considered Brachysporiella and Monotosporella as two distinct genera. The taxonomic status of Brachysporiella is still doubtful and is currently placed in Kirschsteiniotheliales genera incertae sedis. Brachysporiella may warrant familial rank. More collections with DNA sequence data are needed to confirm the taxonomic placement of the genus. ITS and LSU sequence data are available for Brachysporiella navarrica.


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