Marinophialophora garethjonesii J.F. Li, Phookamsak, Dayarathne & K.D. Hyde, 2018

Li, Junfu, Jeewon, Rajesh, Phookamsak, Rungtiwa, Bhat, Darbhe J., Mapook, Ausana, Chukeatirote, Ekachai, Hyde, Kevin D., Lumyong, Saisamorn & Mckenzie, Eric H. C., 2018, Marinophialophora garethjonesii gen. et sp. nov.: a new hyphomycete associated with Halocyphina from marine habitats in Thailand, Phytotaxa 345 (1), pp. 1-12 : 4

Marinophialophora garethjonesii J.F. Li, Phookamsak, Dayarathne & K.D. Hyde , sp. nov.

Index Fungorum number: F552734; Facesoffungi number: FOF 02833; Fig. 1 , 2

Etymology — Named in honour of the mycologist Professor E.B. Gareth Jones, in recognition of his contribution to the study of marine fungi.

Holotype: MFLU 16-2821

Hyphomycetous associated with Halocyphina species on decaying mangrove wood. Sexual morph: Undetermined. Asexual morph: Mycelium partly superficial, partly immersed on the substrate, composed of septate, branched, smooth, thin-walled, hyaline to subhyaline hyphae. Conidiophores 75–135 × 1.1–2 μm (x = 105 × 1.6 μm, n = 20), macronematous, mononematous, arising from hyphae, hyaline to subhyaline, thin-walled, smooth, aseptate, unbranched to branched, straight, cylindrical. Conidiogenous cells 1.7–2.5 × 1.3–1.9 μm (x = 2.1 × 1.7 μm, n = 20), phialidic, integrated, terminal or intercalary, determinate, hyaline to subhyaline, globose to ellipsoidal, smooth, without a conspicuous collarette. Conidia 1.3–1.5 × 1.4–1.7 μm (x = 1.4 × 1.6 μm, n = 20), phialoconidia, hyaline to subhyaline, globose to subglobose, aseptate, borne in basipetally developing unbranched or branched chains, clavate, smooth, thin-walled.

Cultural characteristics: — Conidia germinating on PDA within 12 hrs at 25 ºC, germ tubes produced from apex. Colonies growing on PDA reaching 5 mm diam. after 2 weeks at 25 ºC, mycelium semi-immersed to superficial, irregular in shape, flat, slightly raised, with trim edge, slightly rough on surface, hairy to powdery, cottony from above, initially dark brown, becoming black after 2 weeks; from below, always black.

Material examined: — THAILAND, Phetchaburi Province, Hat Chao Samran, associated with Halocyphina sp. ( Niaceae, Agaricamycetes ), on intertidal decaying wood of mangrove stand, 28 August 2015, Monika C. Dayarathne, H-42 ( MFLU 16-2821 , holotype ; HKAS96301 , isotype ), ex-type living culture, KUMCC 16-0066, MFLUCC 16- 1449.

Figures

FIGURE 1 Marinophialophora garethjonesii (MFLU 16-2821, holotype). a. Appearance of mycelium growing on Halocyphina on mangrove wood. b Hyphae on Halocyphina. c–d. Conidiophores bearing conidia. e–i. Conidiophores with conidiogenous cells. k–m. Conidia in chain. j, n–o. Conidia. p. Culture characteristic on PDA. Scale bars: p = 1 cm, a = 200 μm, b–d, i = 10 μm, e–h, j–m = 5 μm, n–o = 2 μm.

FIGURE 2 Marinophialophora garethjonesii (KUMCC 16-0066, from ex-type culture). a. Sporulating culture on PDA. b–c. Hyphae with conidiophores and conidiogenous cells. d–e. Conidiogenous cells producing conidia. f–m. Conidia. Scale bars: a = 100 μm, c = 10 μm, h–j = 5 μm, b, d–g, m = 2 μm, k–l = 1 μm.