Pleosporales » Pleosporales, genus incertae sedis


Briansuttonia R.F. Castañeda, Minter & Saikawa, Mycotaxon 89(2): 304 (2004).

Index Fungorum number: IF 28817; Facesoffungi number: FoF 11784, 1 morphological species (Species Fungorum 2022), no molecular data available.

Conidial fungi, Hyphomycetes. Sexual morph: Unknown Asexual morph: Colonies effuse, hairy to funiculose, brown to dark brown. Mycelium superficial and rather immersed, composed of septate, anastomosing, brown or dark brown, smooth-walled or verrucose hyphae. Conidiophores differentiated, mononematous, septate, erect, brown to dark brown, smooth-walled or verrucose. Conidiogenous cells unilocal, tretic, terminal, determinate or indeterminate with enteroblastic percurrent proliferations. Conidiogenous loci an apical pore. Conidial secession schyzolytic. Conidia solitary, brown to dark brown, acrogenous, dry, obclavate, obpyriform, ellipsoid or irregular, truncated at the base, smooth-walled or verrucose with 2 to 15 transverse distosepta and several longitudinal and oblique distosepta (adapted from Castañeda et al. 2004).

 Type species: Briansuttonia alternarioides (B. Sutton & Pascoe) R.F. Castañeda, Minter & Saikawa

Notes: Briansuttonia alternarioides was previously known as Corynespora alternarioides but was not congeneric with the type species of Corynespora, C. mazei. Briansuttonia alternarioides resembles members of Corynespora in having similar conidiophores and tretic conidium ontogeny but the conidia are different since they have transverse, longitudinal and oblique distosepta. Briansuttonia also resembles Alternaria in having unilocal, apical conidiogenous loci and muriform conidia but differs in that the conidiogenous loci in Alternaria are flat and melanized and conidia are euseptate. Briansuttonia resembles Stemphylium in having muriform conidia but differs in that the conidial ontogeny in Stemphylium is holoblastic and has euseptate muriform conidia. The systematic position of Briansuttonia is not clear since sequence data is lacking and it is currently placed in Pleosporales genera incertae sedis.


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