Lophiostoma purpurascens (K.D. Hyde & Aptroot) Aptroot & K.D. Hyde
Basionym: Massarina purpurascens K.D. Hyde & Aptroot, Nova Hedwigia 66(3–4): 496 (1998)
Index Fungorum number: IF 375324
Holotype: HKU (M) 362B
Etymology: Latin purpurascens, turning 'purple', in reference to the purple staining of the wood in the vicinity of the fungus.
Sexual morph: Ascomata deeply immersed, partly staining the wood reddish purple, visible as minute ostiolar dots; in section 91–130 µm high, 195–260 µm diam. and 416–715 µm long, lenticular or cylindrical, mostly with a flattened base, papillate, coriaceous and scattered. Papilla ca. 325 µm high, 91 µm wide, immersed, except for the short apex, blackened where superficial, cylindrical; ostiole without periphyses. Peridium 10–25 µm thick, thinner at the base, hyaline inside, partly black outside, comprising 6 or fewer rows of angular to globose cells. Asci 120–180 × 40–50 µm. Ascospores 44–50 × 13–16 µm, 2-3-seriate, fusiform, hyaline, 2-celled, constricted at the septum, surrounded by a 2.5 µm wide mucilaginous sheath. Asexual morph: Undetermined. (Description from Hyde and Aptroot 1998)
Material examined: AUSTRALIA, North Queensland, Atherton Tablelancis, ClohesyRiver on submerged wood, Oct 1990, K.D. Hyde (HKU(M) 362B, holotype). PAPUA NEW GUINEA, Madang Province, foothills of Finisterre range, 40.8 km along road Madang-Lae, 5°26′S, 145°34′E, 200 m alt., on branch submerged in a small stream in primary forest, 2 Nov. 1995. A. Aptroot 36619 (CBS).
Freshwater distribution: Australia (Hyde and Aptroot 1998), China (Tsui et al. 2000), New Guinea (Hyde and Aptroot 1998)