Gamsomyces stilboideus (R.F. Castañeda & G.R.W. Arnold) Hern.-Restr. & Réblová, Stud. Mycol. 95: 451 (2020)

MycoBank number: MB 834450; Index Fungorum number: IF 834450; Facesoffungi number: FoF 12804;

Basionym: Bactrodesmium stilboideum R.F. Castañeda & G.R.W. Arnold, Revta. Jardín bot. Nac. Univ. Habana 6(1): 48 (1985).

Stigmina longispora var. stilboidea (R.F. Castañeda & G.R.W. Arnold) J. Mena & Mercado, Rep. de Investigacion del Instituto de Ecología y Sistemática, Academia de Ciencias de Cuba, Ser. Bot. 17: 10 (1987)

Saprobic on decaying submerged wood in freshwater. Asexual morph: Conidiomata on natural substrate synnematous, superficial, scattered, dark brown or mid brown, with glistening conidial masses at the apex, synnemata 160–350 μm long and 16–32 μm wide. Mycelium mostly immersed, composed of septate, smooth, pale brown hyphae. Conidiophores macronematous, fasciculate, erect, straight, or slightly flexuous, cylindrical, smooth, septate, unbranched or branched, mid brown, paler at upper part, tightly compact forming synnemata, thick-walled, 150–350 × 1.2–2.7 µm ( = 257 × 2.1 µm, n = 20). Conidiogenous cells monoblastic, integrated, terminal, or intercalary, cylindrical, or slightly swollen, pale brown to subhyaline, 8–18 × 2.3–3.6 µm ( = 11.5 × 2.9 µm, n = 20). Conidia acrogenous, narrowly fusiform, straight, or slightly flexuous, truncate at the base, rounded to subulate at the apex, 11–13-septate, smooth, guttulate, subhyaline to pale greenish brown, paler at both ends, 36–63 × 6–9 µm ( = 53.5 × 7.7 µm, n = 35), sometimes with a globose mucilaginous cap at the apex. Conidial secession schizolytic. Sexual morph: Undetermined.