Annulatascales » Annulatascaceae


Ascitendus J. Campb. & Shearer

Index Fungorum number: IF28871; 2 species with sequence data.

Etymology: From the Latin asci and tendere = to stretch, in relation to the lengthening of the asci on contact with water.


Sexual morph: Ascomata globose to subglobose, ostiolate with a prominent neck. Neck central, cylindrical, periphysate, black at wall 2-layered, outer layer of dark brown, laterally compressed thin-walled cells incorporated with brown amorphous material, inner layer of laterally compressed thin-walled hyaline cells. Hamathecium paraphysate; paraphyses longer than asci. Asci 8-spored, unitunicate, cylindrical, long pedicellate, with a prominent cylindrical to flaring J- apical ring. Ascospores hyaline when immature, becoming 3-septate at maturity, each cell with a single large guttule, smooth or rough-wall, without appendages or a sheath. Asexual morph: Undetermined.

Type species: Ascitendus austriacus (Réblová, Winka & Jaklitsch) J. Campb. & Shearer


Notes: Réblová and Winka (2001) introduced a new species, Ascolacicola austriaca from a stream in Australia. Campbell and Shearer (2004) examined 27 collections of Ascolacicola austriaca and found its morphology to be different from the type species of the genus. Based on the morphological differences between Ascolacicola austriaca and A. aquatica and phylogenetic analysis, a new genus Ascitendus was proposed for Ascolacicola austriaca (Campbell and Shearer 2004). Hyde et al. (2018) introduced the second species for this genus. Currently, two species of Ascitendus are accepted and both were collected from freshwater habitats (Réblová and Winka 2001; Campbell and Shearer 2004; Hyde et al. 2018).



Campbell J, Shearer CA (2004) Annulusmagnus and Ascitendus, two new genera in the Annulatascaceae. Mycologia 96:822–833.

Hyde, KD; Chaiwan, N; Norphanphoun, C; Boonmee, S, et al. 2018. Mycosphere notes 169–224. Mycosphere. 9(2):271-430

Réblová M, Winka K (2001) Generic concepts and correlations in ascomycetes based on molecular and morphological data: Lecythothecium duriligni gen. et sp. nov. with a Sporidesmium anamorph, and Ascolacicola austriaca sp. nov. Mycologia 93:478–493


About Freshwater Fungi

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