Ascomycota, genera » incertae sedis

Fuckelia

Fuckelia Bonord., Abh. naturforsch. Ges. Halle 8: 135 (1864)

Facesoffungi number: FoF 07401

Ascomycota, genera incertae sedis

 

Habit on the host plant, Ribes sp., R. rubrum (Grossulariaceae). Sexual morph: putative sexual morph Godronia ribis (Groves 1965). Asexual morph: Conidiomata grey to grey brown, sometimes almost concolorous, eustromatic, pycnidial, with or without a basal, central foot, separate or caespitose, peridermal to subperidermal, superficial, pulvinate or verruciform to discoid, multilocular, convoluted, glabrous, locules developing in the upper part, ovoid to irregular, unequal in size. Ostiole absent, rupturing surface by means of irregular splits of upper walls of locules. Conidiomatal wall composed of thick-walled, hyaline to yellowish or brownish, interwoven hyphae of textura epidermoidea at the basal part, becoming thick-walled, dark brown cells of textura angularis towards upper part in the exterior, gradually merging with thin-walled, pale brown cells of textura angularis or intricata in the interlocular wall. Conidiophores formed from the inner cells of locular wall, hyaline, cylindrical or irregular, branched irregularly above and below, septate, smooth-walled. Conidiogenous cells hyaline, enteroblastic, phialidic, lageniform to cylindrical, integrated, less often discrete, determinate, smooth-walled, with apical or lateral apertures on small branches immediately below septa, periclinal thickenings at channel wall. Conidia hyaline, ellipsoid, rounded at the apex, narrow and truncate at the base, 1-septate, smooth-walled, guttulate (adapted from Groves 1965, Sutton 1980).

 

Type species: Fuckelia ribis (Fr.) Bonord., Abh. naturforsch. Ges. Halle 8: 135 (1864)

 

Notes: The type species Fuckelia ribis has been generally considered as asexual morph of Godronia ribis (Fr.) Seaver (Cash 1934, Seaver 1945, Groves 1965). Accordingly, Johnston et al. (2014) recommended the use of Godronia over Fuckelia for the holomorph. Chondropodiella and Topospora were also treated as taxonomically congruent with Godronia by Johnston et al. (2014). However, there is considerable difference in conidiomata, conidiogenous cells and the conidia among these three genera. Chondropodiella has cylindrical-subulate, unilocular, beaked conidiomata, holothallic conidiogenous cells and arthric, cylindrical to ellipsoid, aseptate conidia. Topospora has globose to oval or obpyriform, unilocular conidiomata, phialidic conidiogenous cells and cylindrical to fusiform, 3-septate conidia. Fuckelia has multilocular, convoluted conidomata with or without basal central foot, phialidic conidiogenous cells and ellipsoid, 1-septate conidia. The connection between F. ribis and Godronia ribis relies on constant association of both morphs but has not been confirmed by culture studies or other evidence. Therefore, Fuckelia should be treated as a legitimate name as suggested by Kirk (2013), until molecular evidence is available.

 

Distribution: Austria, UK (Sutton 1980).

 

Fuckelia ribis (redrawn from Sutton 1980) a Conidia. b Conidiophores and conidiogenous cells. c Vertical section of conidioma.

 

References:

 

Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.

 

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