Pauahia
Pauahia F. Stevens, Bulletin of the Bernice P. Bishop Museum, Honolulu, Hawaii 19: 17 (1925).
Index Fungorum number: IF 3773; Facesoffungi number: FoF 00749, 1 morphological species (Species Fungorum 2022), no molecular data available.
Epiphytes on the surface of Sideroxylon. Superficial hyphae and hyphopodia absent. Sexual morph: Ascostromata superficial or erumpent at the base, pseudostromata, solitary, subglobose or irregular, thick-walled. Locules immersed in ascostromata, 1–multi-loculate. Peridium of locules comprising two strata, outer stratum of dark brown cells of textura angularis, and inner stratum of hyaline to pale brown, flattened cells. Hamathecium with paraphyses. Asci 2-spored, bitunicate, broadly clavate to oval, with short pedicel, evanescent. Ascospores 2-seriate, hyaline to brown, oblong to cylindrical, 3-septate, constricted and darker at the septa, terminal cells markedly smaller and slightly lighter than the others, thin sheath present at maturity, smooth-walled. Asexual morph: Unknown (adapted from Hongsanan et al. 2015).
Type species: Pauahia sideroxyli F. Stevens
Notes: Pauahia is characterised by superficial or erumpent ascostromata, 1–multi-loculate locules, broadly clavate to oval, with short pedicel asci and hyaline to brown, oblong to cylindrical, 3-septate ascospores. Stevens (1925) placed Pauahia in Dothideaceae in the section Leveillelleae. Lumbsch and Huhndorf (2010) and Kirk et al. (2013) accepted Pauahia in Meliolaceae. Hongsanan et al. (2015) examined the holotype specimen of P. sideroxyli and reported that it differs from other genera in Meliolaceae in having large pseudostromata, erumpent in host epidermal cells, without superficial hyphae and bitunicate asci. Hongsanan et al. (2015) excluded Pauahia from Meliolaceae and placed it in Dothideomycetes genera incertae sedis. Wijayawardene et al. (2017, 2020) listed Pauahia in Dothideomycetes genera incertae sedis. Molecular data is lacking. Fresh collections with DNA sequence data are needed to confirm the systematic position of Pauahia.
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