Atractospora Réblová & J. Fourn., in Réblová, Fournier & Štěpánek, Mycol. Progr. 15(no. 21): 8 (2016)
Diaporthomycetidae, Atractosporales, Atractosporaceae, Atractospora
Index Fungorum number: IF309; Facesoffungi number: FoF 05072; 6 morphological species (Species Fungorum 2020); 6 species with sequence data.
Saprobic on submerged deciduous wood. Sexual morph: Ascomata solitary or aggregated in small groups, immersed or semi-immersed to superficial, astromatic, subglobose to conical, dark brown to black, with a lateral neck, often lying horizontally on the substrate surface. Ostiole periphysate. Peridium leathery to fragile, two-layered. Paraphyses abundant, persistent, cylindrical. Asci 8-spored, unitunicate, pedicellate, apically rounded or obtuse, with a J-, relatively small, apical ring. Ascospores uniseriate, hyaline, fusiform, aseptate or transversely septate, smooth or ornamented. Asexual morph: Undetermined (adapted from Zhang et al. 2017).
Type species: Atractospora reticulata Réblová & J. Fourn., in Réblová, Fournier & Štěpánek, Mycol. Prog. 15 (no. 21): 10 (2016)
Notes: Atractospora was introduced by Réblová et al. (2016) with three new species and a new combination. Zhang et al. (2017) extended the generic description to accommodate taxa with both thick- and thin-walled ascospores as A. thailandensis was included based on phylogeny and otherwise similar morphology. Asexual morphs of this genus have not been reported from the natural substrate. However, asexual structures were observed in cultures of A. decumbens and characterized by ellipsoidal to subglobose conidia, brown, aseptate and thick-walled, often forming in short chains of three to five cells (Réblová et al. 2016).
Species illustrated in this entry
Atractospora thailandensis W. Dong, H. Zhang & K. D. Hyde
Réblová M, Fournier J, Štěpánek V. 2016 – Two new lineages of aquatic ascomycetes: Atractospora gen. nov. and Rubellisphaeria gen. et sp. nov., and a sexual morph of Myrmecridium montsegurinum sp. nov. Mycological Progress 15, 1–39.
Zhang H, Dong W, Hyde KD, Maharachchikumbura SSN et al. 2017 – Towards a natural classification of Annulatascaceae-like taxa: introducing Atractosporales ord. nov. and six new families. Fungal Diversity 85, 75–110.