Colensoniella
Colensoniella Hafellner, Beihefte zur Nova Hedwigia 62: 160 (1979).
Index Fungorum number: IF 1172; Facesoffungi number: FoF 08126, 1 morphological species (Species Fungorum 2022), no molecular data available.
Saprobic on bark in terrestrial habitats. Sexual morph: Apothecia superficial, dense, gregarious or solitary, discoid to circular, sometimes variable in shape, brown to black, with slightly raised margins. Hymenium thicker at base, thinner at apex and sides, composed of sterile filaments and asci, supported within an excipulum composed of sparingly branched anchoring hyphae emerging from the underside of fruiting structure, with globose and subglobose cells forming a flattened textura globulosa. Hamathecium comprising long, dense, septate, hyaline pseudoparaphyses, apically filaments forming a reddish-brown epithecium above the asci, immersed in mucilage. Asci 8-spored, bitunicate, clavate to cylindrical, long pedicellate, apically rounded with an indistinct ocular chamber. Ascospores uniseriate or overlapping uniseriate, oblong, one septate, obtuse at both ends, light brown to dark brown, thick- and smooth-walled, breaking in the centre to form cuneiform part-spores. Asexual morph: Unknown (adapted from Tian et al. 2014).
Type species: Colensoniella torulispora (W. Phillips) Hafellner
Notes: Colensoniella is characterised by superficial, dense, gregarious or solitary, discoid to circular ascomata, clavate to cylindrical, long pedicellate, apically rounded asci with an indistinct ocular chamber, and uniseriate or overlapping uniseriate, oblong, one-septate ascospores. Colensoniella resembles Patellaria in having scattered, apothecioid, superficial ascomata, isodiametric, thick-walled, dark brown exciple cells, and filiform, hyaline pseudoparaphyses forming an epithecium around the asci (Tian et al. 2014). Colensoniella differs from other genera in Patellariaceae in having uniseriate, oblong ascospores with 1 septum, breaking in the center to form cuneiform part-spores. Molecular data is lacking for Colensoniella and fresh collections are required to confirm the correct taxonomic placement of the genus.
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