Paradictyoarthrinium aquatica Z.L. Luo & J.K. Liu., 2018

Liu, Jian-Kui, Luo, Zong-Long, Liu, Ning-Guo, Cheewangkoon, Ratchadawan & To-Anun, Chaiwat, 2018, Two novel species of Paradictyoarthrinium from decaying wood, Phytotaxa 338 (3), pp. 285-293 : 288-289

Paradictyoarthrinium aquatica Z.L. Luo & J.K. Liu. , sp. nov. FIGURE 2

Index Fungorum number: IF554081; Facesoffungi number: FoF 03932,

Etymology: Name after the substrate where the fungus was collected from decaying wood submerged in freshwater.

Holotype: HKAS 92873

Saprobic on submerged decaying wood in freshwater habitats. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Colonies on natural substrate, superficial, black, scattered, black, gregarious, powdery. Conidiophores 4.5–10.5 μm (x = 7.5 μm, n = 15) long, 2–6 μm (x = 4 μm, n = 15) diam., macronematous, rarely micronematous, short, erect to slightly curved, black, slightly constrict at the septa, arising from hyphae. Conidiogenous cells blastic, integrated, terminal. Conidia 20–30 × 18–28 μm (= 25 × 23 μm, n = 30), unevenly dictyoseptate, muriform, subglobose to ellipsoidal, peacock green when immaturated, dark brown to black when maturity, verrucose, solitary or forming in branched chains, hardly separating, variable in size and shape, circular to irregular with a protruding nasal cell; rounded to truncate at the base.

Culture characters: Conidia germinating on PDA within 24 h. Germ tubes produced around conidia. Colonies on PDA reaching 32–45mm diam. after 10 days in the dark at 25 °C, circular shape, superficial, flattened to effuse, velvety, dense, grey, entire edge.

Material examined – CHINA, Yunnan Province, saprobic on decaying wood submerged in Lancang river , April 2015, H.Y. Su, S-493, ( HKAS 92873 , holotype) ; ex-type living culture MFLUCC 16–1116 .

Figures

FIGURE. 2 Paradictyoarthrinium aquatica. (HKAS 92873, holotype) a, b Colonies on wood. c, d, j, k Conidia in chians. e, h, i Conidia with conidiophores. f, g Immaturated conidia. l Germinating conidium. m, n Colonies on PDA from surface and reverse. Scale bars: c–e = 20 μm, f–k = 15 μm.