Purpureofaciens W. Dong, H. Zhang & K.D. Hyde
Index Fungorum number: IF557804
Saprobic on decaying wood submerged in freshwater. Sexual morph: Ascomata black, scattered or gregarious, semi-immersed to superficial, conical, flattened at the basal region, stain the substrate purple and produce reddish pigmentation at the apex, coriaceous, with a large, protuberant, ostiolate papilla. Peridium of unequal thickness, poorly developed at the base, composed of reddish brown, large cells of textura angularis. Pseudoparaphyses numerous, trabeculate, filiform, hyaline, embedded in a hyaline gelatinous matrix. Asci 8-spored, bitunicate, cylindrical, pedicellate, apically rounded. Ascospores uniseriate, curved, olivaceous, septate, ellipsoidal with acute ends, guttulate, thin-walled, smooth, surrounded by a thin mucilaginous sheath. Asexual morph: Undetermined.
Notes: Purpureofaciens is unique by semi-immersed to superficial, conical ascomata staining woody substrate purple, cylindrical asci, ellipsoidal, curved, olivaceous ascospores with acute ends and white to reddish colonies in culture (Mugambi and Huhndorf 2009; Liu et al. 2015). The reddish culture is also observed in a strain of Anteaglonium parvulum (MFLUCC 14-0821), which has similar shape of ascospores, but the characters of ascomata, asci and ascospores can easily separate them (Jayasiri et al. 2016). Flammeascoma has reddish pigmentation at the apex of ascomata, which resembles Purpureofaciens. However, the conical ascomata with a large, protuberant, ostiolate papilla, cylindrical asci and ellipsoidal, olivaceous ascospores of Purpureofaciens are different from those of Flammeascoma (Liu et al. 2015). Purpureofaciens clusters with Flammeascoma species with low bootstrap support and morphology separates them as distinct genera. Purpureofaciens comprises one freshwater species P. aquatica which was collected from Thailand.
Type species: Purpureofaciens aquatica W. Dong, H. Zhang & K.D. Hyde, in Dong et al., Fungal Diversity: 10.1007/s13225-020-00463-5,  (2020)
Dong, W., Wang, B., Hyde, K.D., McKenzie, E.H.C., Bhat, D.J et al. (2020) Freshwater Dothideomycetes. Fungal Diversity
Jayasiri SC, Jones EBG, Kang JC, Promputtha I et al. (2016) A new species of genus Anteaglonium (Anteagloniaceae, Pleosporales) with its asexual morph. Phytotaxa 263:233-244
Liu JK, Hyde KD, Jones EBG, Ariyawansa HA et al. (2015) Fungal diversity notes 1–110: taxonomic and phylogenetic contributions to fungal species. Fungal Diversity 72:1-197
Mugambi G, Huhndorf S (2009) Parallel evolution of hysterothecial ascomata in ascolocularous fungi (Ascomycota, Fungi). Systematics and Biodiversity 7:453-464