Togniniella Réblová, L. Mostert, W. Gams & Crous, Stud. Mycol. 50(2): 543 (2004)
Diaporthomycetidae, Calosphaeriales, Calosphaeriaceae, Togniniella
Index Fungorum number: IF 500157; 1 morphological species; 1 species with sequence data.
Saprobic on wood. Sexual morph: Ascomata perithecial, gregarious or solitary, immersed to semi-immersed, globose to subglobose, glabrous, brown to black, carbonaceous to coriaceous, immersed, the long necks erumpent through the bark of the host. Necks central, cylindrical or slightly flexuous, black, smooth, apex broadly rounded, ostiolate, periphysate. Peridium comprising two layers, outer layer carbonaceous or coriaceous, composed of brown cells of textura angularis; inner layer membranaceous, composed of hyaline cells of textura prismatica. Paraphyses unbranched, broad, cylindrical, septate, slightly constricted at the septa, tapering, with a rounded apex, longer than asci. Ascogenous hyphae discrete, hyaline, smooth-walled, branched, with hyaline, obovoid to ellipsoidal cells, growing in sympodial
succession, in dense clusters, each giving rise to an ascus. Asci 8-spored, unitunicate, clavate, pedicellate,
apex obtuse, without apical ring. Ascospores overlapping near the apex, allantoid to suballantoid, straight to slightly curved, aseptate, hyaline, smooth-walled, sometimes with guttules. Asexual morph: Hyphomycetous. Conidiophores macronematous or micronematous, usually arising from aerial hyphae, erect, hyaline to pale brown, unbranched or branched, straight or flexuous, septate, constricted at the septa. Phialides monophialidic or polyphialidic, terminal or intercalary, subcylindrical to ampulliform, tapering, smooth-walled, hyaline, with cylindrical adelophialides. Conidia hyaline, obovoid to reniform, straight or slightly curved, aseptate, smooth-walled, accumulating in slimy masses on the apex of the phialides (copied from Huang et al. 2021).
Type species: Togniniella microspora (Ellis & Everh.) Réblová, Fungal Diversity 49: 193 (2011)
Notes: The monotypic Togniniella was initially typified by T. acerosa, and its asexual morph was introduced as Phaeocrella acerosa (Réblová et al. 2004). Subsequently, the name T. acerosa was corrected as T. microspora (Réblová 2011; Réblová et al. 2015). Réblová et al. (2016) recommended that Phaeocrella should be synonymized under Togniniella, according to nomenclatural priority. This genus is characterized
by clavate, tiny asci, allantoid ascospores and verrucous phialides with reniform conidia (Réblová et al. 2004, 2015, 2016; Réblová 2011), and phylogenetic information is available (Réblová et al. 2004; Damm et al. 2008; Vu et al. 2019). In the study by Huang et al. (2021), Togniniella is sister to Flabellascus (100%ML/1.00PP) (copied from Huang et al. 2021).
Species illustrated in this entry:
Togniniella microspora (Ellis & Everh.) Réblová