Oxydothis atypica Pinruan.
Index Fungorum Number: IF551015, Facesoffungi number: FoF00485, Fig. 1
Etymology: atypica refers to the differences from the typical ascospore characters.
Holotypus: Pinruan 135 in BBH.
Saprobic on dead leaves of Licuala longicalycata Furtado in peat swamp. Ascomata 270–275μm, visible on the host surface as a minute blackened dot with eccentric, periphysate ostiole, immersed, lenticular to subglobose, brown, coriaceous, scattered. Peridium 10–12.5μm wide, comprising 3–6 layers of flattened, brown-walled cells of textura angularis, fusing at the outside with the host tissues. Paraphyses 8.75μm wide at the base, hypha-like, tapering to the apex, longer than asci, not embedded in a gelatinousmatrix. Asci 87.5–95×7.5– 8.75μm, 8-spored, cylindrical, unitunicate, thin-walled, pedicellate, apically rounded, with a J+, cylindrical, subapical ring, 5–5.25μm high × 2.2–2.5μm diam. Ascospores 42.5–45×5– 6.5μm, overlapping 2-seriate, hyaline, 1-septate, tapering gradually to a point at the apex with a mucilaginous drop and with a long drawn out spine at the base.

Holotypus: THAILAND, Narathiwat Province, Sirindhorn Peat Swamp Forest, on dead leaves of Licuala longicalycata (Arecaceae), 13 February 2002, U. Pinruan (Pinruan 135 in BBH, holotype).

Notes: The characteristic features of Oxydothis atypica are immersed ascomata with an eccentric neck, well-developed paraphyses, cylindrical asci with a J+, subapical ring and pointed ascospores (Hyde 1995; Hyde and Alias 2000). This species differs from all species of Oxydothis as it has asymmetrical ascospores, with a short pointed apex and a long spine at the base (Hyde 1995; Fröhlich et al. 2000).

Fig. 1 Oxydothis atypica (holotype) a Colonies on substratum b Section of ascoma c Asci with J+ ring d Asci e Paraphyses fi Ascospores. Scale bars a=1000μm; b=100μm; c-i=10μm