Phylloporis Clem., Gen. Fungi: 41, 173 (1909); Vězda, Folia Geobot. Phytotax. 19: 185 (1984); Jiang et al., Fung. Div. 102: 287.
MycoBank number: MB 4070; Index Fungorum number: IF 4070; Facesoffungi number: FoF 08882; nine morphologically delimited species (Jiang et al. 2020b; this paper); molecular data available for two species (Jiang et al. 2020b).
= Porinomyces Bat. in Bezerra et al., Atas Inst. Micol. Univ. Pernambuco 5: 410 (1967) [nom. inval.]; Lücking et al., Lichenologist 30: 168 (1998).
Original species: Porin- omyces phyllogenus (Müll. Arg.) Bat. [≡ Strigula phyllogena (Müll. Arg.) R. C. Harris].
= Didymaster Bat. & H. Maia, Atas Inst. Micol. Univ. Pernambuco 5: 58 (1967); Lücking et al., Lichenologist 30: 140 (1998).
Type species: Didymaster myrtaciicola Bat., H. Maia & Castro [= Strigula platypoda (Müll. Arg.) R. C. Harris].
= Manaustrum Cavalc. & A. A. Silva in Cavalcante et al., Publ. Inst. Micol. Univ. Fed. Pernambuco 647: 13 (1972);
Lücking et al., Lichenologist 30: 146 (1998).
Type species: Manaustrum palmae Cavalc. & A. A. Silva [= Strigula multipunctata (R. Sant.) R. C. Harris].
= Porina sect. Sagediastrum Müll. Arg., Flora 66: 335 (1883); Vainio, Ann. Acad. Sci. Fenn., Ser. A, 15 (1921); Santesson, Symb. Bot. Upsal. 12(1): 202 (1952). Sectional type. Porina phyllogena Müll. Arg. [≡ Strigula phyllogena (Müll. Arg.) R. C. Harris].
Lichenized on leaves or more rarely on bark and rock in terrestrial, lowland to montane, tropical (to subtropical) habitats. Thallus ecorticate, grey-green to grey, supracuticular. Photobiont Phycopeltis. Sexual morph: Ascomata perithecia, erumpent to prominent, black or covered by thallus layer, wart-shaped to conical, carbonaceous, ostiolate. Involucrellum present, carbonized. Excipulum prosoplectenchymatous, dark brown to brown-black. Hamathecium comprising 0.5–0.7 µm wide paraphyses, hyaline, flexuose, unbranched. Asci 8-spored, bitunicate, fissitunicate, cylindrical, shortly pedicellate, with narrow ocular chamber, non-amyloid. Ascospores irregularly arranged to biseriate, fusiform to ellipsoid, hyaline, 1-septate, with thin eusepta and rectangular lumina, smooth-walled, slightly constricted at the septa. Asexual morph: Pycnidia common, erumpent, visible as black dots, often whole thalli only producing pycnidia. Conidia acrogenous, either macro- or microconidia; macroconidia 1-septate, ellipsoid to bacillar, with gelatinous appendages, hyaline; microconidia aseptate, ellipsoid to fusiform, small, hyaline.
Chemistry: No secondary substances known.
Type. Phylloporis phyllogena (Müll. Arg.) Clem., Gen. Fung.: 173 (1909).
Notes: This genus has long been recognized as a separate group within Strigula sensu lato (Clements 1909; Vězda 1984) and has even been treated under Porina instead of Strigula (Santesson 1952). Its inclusion in Strigula based on internal anatomy and ascus type (e.g. Harris 1995; Lücking 2008) expresses close phylogenetic relationship, but a schematic broad genus concept, based on shared anatomical features, is not warranted, as shown in numerous other fungal families where genera agree in ascoma anatomy but differ in thallus morphology (e.g. Parmeliaceae). Phylloporis is a basally diverging clade among the foliicolous clades of Strigula sensu lato (Jiang et al. 2020b), indicating that its supracuticular growth may be a plesiomorphy shared with Flavobathelium and Phyllobathelium and the subcuticular growth of all other clades evolved as a single synapomorphy. Phylloporis currently includes seven foliicolous species (Jiang et al. 2020b). Here, we also accept two at least partly non-foliicolous species in this genus (see new combinations proposed below). One of these, P. cinefaciens, is chiefly foliicolous but also rarely found on smooth bark, whereas the other, P. hypothallina, is thus far only known from the corticolous type material. Both may be distinguished from Dichoporis by the very thin thallus featuring a Phycopeltis-like photobiont (see also above).