Aquaphila Goh, K.D. Hyde & W.H. Ho, Mycol. Res. 102(5):588 (1998).
Index Fungorum number: IF 27791; Facesoffungi number: FoF 02356, 2 morphological species (Species Fungorum 2022), 1 species with molecular data.
Saprobic on wood. Sexual morph: Unknown. Asexual morph: Colonies on natural substrate effuse, non-dematiaceous. Mycelium partly immersed in woody substratum and partly superficial. Stromata, setae and hyphopodia absent. Conidiophores semi-macronematous, mononematous, borne as lateral branches from superficial hyphae, hyaline, delicate, septate, simple or branched, flexuous and geniculate. Conidiogenous cells integrated, terminal or intercalary, denticulate, monoblastic or polyblastic, proliferation sympodial, indeterminate. Conidial secession schizolytic. Conidia borne singly, acrogenous and becoming lateral as a result of conidiophore proliferation, hyaline, fusoid to falcate or sigmoid, broad, multi-euseptate, apedicellate (adapted from Goh et al. 1998).
Type species: Aquaphila albicans Goh, K.D. Hyde & W.H. Ho
Notes: Aquaphila is characterised by semi-macronematous, mononematous conidiophores, schizolytic conidial secession and hyaline, fusoid to falcate or sigmoid conidia. Aquaphila resembles Helicomyces in having an aquatic habitat, hyaline conidiophores produced as lateral branches from repent mycelium, mono- or polyblastic conidiogenous cells with sympodial proliferation, and nondematiaceous conidia formed holoblastically from short, cylindrical denticles (Goos 1985). Aquaphila differs from Helicomyces in producing helicoid conidia comprising multiseptate conidial filament coiled 1–8 times while Aquaphila produces hyaline, fusoid to falcate or sigmoid, broad, multi-euseptate, apedicellate conidia. Aquaphila also differs from Helicomyces in that the basal cell of the conidia in Aquaphila is obconically rounded but not enlarged, and the attachment is central while those of Helicomyces is often enlarged and the conidia are attached eccentrically to the conidiogenous denticle (Goos 1985). Aquaphila bears some morphological resemblance to Fusarium in conidial morphology but differs in absence of aerial mycelium, producing mesoconidia, in having 6–14-septate, heavily guttulate, larger conidia. Aquaphila is also similar to Fusarium in having sympodially elongating, geniculate, denticulate, often proliferating conidiogenous cells but Aquaphila lacks aerial mycelium. Aquaphila is however phylogenetically distinct from Helicomyces and Fusarium and forms a well-supported lineage in Tubeufiaceae. Molecular data available for Aquaphila in GenBank are ITS, LSU, SSU, TEF and RPB2.
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