Stratisporella
Stratisporella Hafellner, Beihefte zur Nova Hedwigia 62: 207 (1979).
Index Fungorum number: IF 20613; Facesoffungi number: FoF 00365, 1 morphological species (Species Fungorum 2022), no molecular data available.
Parasitic on lichenized thallus of Tremotylium angolense Nyl. in terrestrial habitats. Sexual morph: Ascomata apothecial, solitary, immersed, black, closed when young and disc-like to lentiform when mature, pyriform to clavate, similar to an inverted cone. Exciple comprised of isodiametric cells, outer layer comprising brown to dark brown paraplectenchymatous cells, and inner layer of pale brown to brown cells of textura intricata. Hamathecium composed of 2–3 µm wide, cylindrical to filiform, septate, branched, pseudoparaphyses, forming a brown epithecium above asci. Asci 4–8-spored, bitunicate, cylindrical, pedicellate, with an ocular chamber. Ascospores uni-seriate overlapping, ellipsoidal to slightly oblong, broader at the upper part, asymmetrically1-transverse septate, with a conspicuous thick exospore, pale to brown, with warty surface. Asexual morph: Unknown (adapted from Yacharoen et al. 2015).
Type species: Stratisporella episemoides (Nyl.) Hafellner
Notes: Stratisporella is characterised by apothecial, solitary ascomata, cylindrical, pedicellate asci and ellipsoidal to slightly oblong ascospores. Hafellner (1979) highlighted the unitunicate nature of asci and hymenium gel turning blue in iodine. Kutorga and Hawksworth (1997) treated Stratisporella in Patellariaceae and mentioned that the asci are bitunicate. Yacharoen et al. (2015) examined the holotype specimen of S. crassula (H-Nyl 10975) and accepted Stratisporella as a distinct genus in Patellariaceae. Stratisporella is currently a distinct genus in Patellariaceae but molecular data is needed to confirm the taxonomic placement of the genus.
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