Mycosphaerellales » Phillipsiellaceae


Phillipsiella Cooke, Grevillea 7(no. 42): 48 (1878).

         Index Fungorum number: IF 3996; Facesoffungi number: FoF xx, 8 morphological species (Species Fungorum 2023), 1 species with molecular data.

            Saprobic on leaves. Sexual morph: Ascomata irregularly scattered on adaxial surface of leaves, superficial on leaf hairs, solitary, not penetrating cells of hairs. Ascomata apothecial, black, flattened, with slightly raised margin, upper surface black, granular, hymenium hyaline, fleshy to gelatinous. Pseudoparaphyses and asci developing from pseudoparenchymatous basal stroma, stroma thin-walled, hyaline hyphae. Pseudoparaphyses septate, hyaline, branching among asci, extending above asci to form a thin, irregular epithecium, of black, granular, inflated hyphal ends; exciple thin, hyphal, extending from basal tissue and continuous with epithecium. Asci bitunicate, broadly clavate to short-cylindric, slightly flattened at apex, in immature asci, endotunica extending as a narrow column into the conspicuously domed ascal apex, at maturity ascal apex thick, ascal contents becoming sienna to umber in IKI, no amyloid reaction although Eriksson (1981) observed blueing of the subhymenium, dehiscence not observed. Ascospores fusiform to ellipsoid, with rounded ends, one septate, hyaline, smooth. Asexual morph: Unknown (adapted from Rossman et al. 1994).

            Type species: Phillipsiella atra Cooke

          Notes: Members of Phillipsiella are characterized by discoid ascomata, clavate to short-cylindric asci, branching septate pseudoparaphyses, and occurrence on living leaves (Rossman et al. 1994). The pseudoparaphyses are well developed forming a definite excipulum and epithecium. Phillipsiella appears as "fly speck" fungi that are present superficially on living leaf and fruit surfaces. LSU sequence is available for one species P. atra (VIC 31773.25) in Genbank.


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