Koralionastes Kohlm. & Volkm.-Kohlm., Mycologia 79(5): 765 (1987)
Lulworthiomycetidae, Koralionastetales, Koralionastetaceae, Koralionastes
Index Fungorum number: IF25184; Facesoffungi number: FoF 02114; 5 morphological species; 1 species with sequence data.
Saprobic on coralline covered rocks, sponges or on algae in marine microhabitats. Sexual morph: Ascomata superficial, black, subglobose, ovoid or ellipsoidal, papillate or epapillate, subiculate, or without subiculum, ostiolate. Ostiole periphysate. Paraphyses simple, septate. Asci 8-spored, unitunicate, clavate to ellipsoidal or fusiform, pedicellate, deliquescent. Ascospores overlapping, hyaline, ellipsoidal to fusiform, multi-septate near the apices, or filiform and evenly multi-septate, thick- or thin-walled, germinating apically, without any appendages. Reproductive structures: Spermatia enteroblastic, subglobose.
Type species: Koralionastes ovalis Kohlm. & Volkm.-Kohlm., Mycologia 79(5): 765 (1987)
Notes: Koralionastes was introduced to accommodate Koralionastes angustus, K. ellipticus and K. ovalis (the type species) by Kohlmeyer & Volkmann-Kohlmeyer (1987). Kohlmeyer & Volkmann-Kohlmeyer (1990) introduced K. giganteus and K. violaceus, found on dead coralline covered rocks among crustose sponges and their ascospores have double walls and are ellipsoidal or fusiform (Campbell et al. 2009). Koralionastes species have been reported to have a unique association with crustaceous sponges, developing their ascomata on or within these hosts (Kohlmeyer & Volkmann-Kohlmeyer 1990; Wang 2006) and is the only marine fungal group which have been identified in marine sponges (Wang et al. 2008).