Yunnanomyces pandanicola Tibpromma & K.D. Hyde, Fungal Diversity: 10.1007/s13225-018-0408-6, [75] (2018)

MycoBank number: MB 555335; Index Fungorum number: IF555335; Facesoffungi number: FoF 04519;

Saprobic on dead leaves of Ananas comosus. Asexual morph: Hypomycetous. Colonies on natural substrate, in small groups, blackish brown, velvety, glistening, with conidia readily liberated when disturbed. Mycelium immersed in the substrate, composed of septate, branched, smooth, hyaline hyphae. Conidiophores micronematous, mononematous, fasciculate, septate, hyaline, smooth, unbranched. Conidiogenous cells 2.8–4 × 2–3 µm (x̅ = 3.4 × 2.6 μm, n = 20), holoblastic, monoblastic, hyaline, integrated, terminal or intercalary, determinate, cylindrical. Conidia 20–24 × 15–17 µm (x̅ = 23.1 × 16 μm, n = 30), acrogenous, solitary, globose to broadly oval, flattened, thick-walled, muriform, consisting of 15–25 cells, yellow–brown. Sexual morph: Undetermined.

Culture characteristics Colonies on PDA, 25–30 mm, diam. after 3 weeks, colonies medium dense, cottony, circular, edge irregular, colony from above, dark brown; from below, dark brown to black, not pigmentation produced in media.

Material examined Taiwan, Chiayi, Fanlu Township area, Dahu forest, dead leaves of Ananas comosus (Bromeliaceae), 20 July 2019, D.S. Tennakoon, TAP025 (MFLU 18-2607), living culture, MFLUCC 19-0068, NCYUCC 19-0128.

Known distribution (based on molecular data) – China (Tibpromma et al. 2018), Thailand (Zhang et al. 2019), Taiwan (this study).

Known hosts (based on molecular data) – on dead leaves of Pandanus amaryllifolius (Tibpromma et al. 2018), on fallen rachides and leaves of Phoenix paludosa (Zhang et al. 2019), on dead leaves of Ananas comosus (this study).

Notes – Morphology of our collection (MFLU 18-2607) resembles Yunnanomyces pandanicola in having broadly oval, yellow-brown, muriform conidia (Tibpromma et al. 2018). In multi-gene phylogeny, our collection clustered with Yunnanomyces pandanicola with high bootstrap support (100% ML, 1.00 BYPP). Based on both morphology and phylogenetic support, we introduce our collection as a new host record of Yunnanomyces pandanicola from Ananas comosus.

Yunnanomyces pandanicola (MFLUCC 19-0068, new host record). a Dead leaf of Ananas comosus. b–d Colonies on dead leaf. e–j Conidia. k, l Conidiogenous cells. m Germinated conidium. n Colony from above. o Colony from below. p, q Colonies on PDA. Scale bars: e = 15 µm, f–l = 10 µm.