Acrodictys aquatica (N.G. Liu & K.D. Hyde) Z.L. Luo & K.D. Hyde
≡Barbatosphaeria aquatica N.G. Liu & K.D. Hyde, in Hyde et al., Mycosphere 9(2): 384 (2018)
Index Fungorum number: IF 655656; Facesoffungi number: FoF 05438
Saprobic on decaying wood. Sexual morph: Undetermined. Asexual morph: Colonies on natural substrate superficial, effuse, dark brown to black, velvety. Mycelium immersed, composed of septate, branched, medium brown, 1.5–3 μm wide hyphae. Conidiophores 70–100 μm long, 4–6 μm wide at base, 1.5–2.2 μm wide at apex, mononematous, erect, straight or broadly curved, greenish-brown to brown, smooth-walled, 4–6-septate, thick-walled, unbranched. Conidiogenous cells 10–15 μm long, monoblastic, terminal, integrated, medium brown, smooth-walled. Conidia 20–27 × 10–17 μm (x̄ = 22.22 × 13.29 μm, n = 13), solitary, dry, clavate, green to greenish-brown, with 3–4 transverse septa, deeply constricted at the septa, distinctly verruculose, with 1–2 basal cells subhyaline to pale brown, smooth-walled and appressed at the upper half.
Culture characteristics: Conidia germinated on WA (Water Agar) within 24 hours. One germ tube produced from the basal cell. Colonies reaching about 5 cm diameter after 10 days on PDA at 25 °C. Mycelia superficial, initially white, later becoming brown to dark brown, hairy, effuse with the entire edge; reverse dark brown at center, light brown towards margin.
Distribution: THAILAND, Chiang Rai Province, Muang, Ban Nang Lae Nai, on decaying wood submerged in a freshwater stream (Hyde et al. 2018).
Notes: Holotype MFLU 18–0040. ITS and LSU sequence data are available. Hyde et al. (2018) introduced the species Barbatosphaeria aquatica based on a collection obtained from freshwater habitat in Thailand. Phylogenetic analysis of Luo et al. (2019) based on multi-genes shows that the strain from ex-type culture of Barbatosphaeria aquatica clusters in the genus Acrodictys. Morphology of Barbatosphaeria aquatica also fits well with Acrodictys species in having mononematous, erect, unbranched conidiophores; monoblastic, terminal, integrated conidiogenous cells; solitary, dry, clavate, green to brown conidia, with transverse septa, deeply constricted at the septa, distinctly verruculose (Hyde et al. 2018). Based on morphology and phylogenetic analyses, we synonymize Barbatosphaeria aquatica under Acrodictys aquatica. (Luo et a. 2019)
Hyde KD, Chaiwan N, Norphanphoun C, Boonmee S, et al. (2018) Mycosphere notes 169–224. Mycosphere 9:271–430.
Luo ZL, Hyde KD, Liu JK, Maharachchikumbura SSN et al. 2019 – Freshwater Sordariomycetes. Fungal Diversity 99, 451–660.