Periconia byssoides Pers., Syn. meth. fung. (Göttingen) 2: 686 (1801)

MycoBank number: MB 144538; Index Fungorum number: IF 144538; Facesoffungi number: FoF 09319; Fig. **

Saprobic on dead twigs attached to Cananga odorata. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Colonies on substrate numerous, effuse, dark brown to black, floccose. Conidiophores 230–250 × 13–17 μm ( = 240 × 15 µm, n = 10), macronematous, mononematous, unbranched, erect, straight or slightly flexuous, single, light brown to dark brown, septate, thick-walled. Conidia 10–12 × 10–13 μm ( = 11 × 12 µm, n = 30), solitary, subglobose to globose, light brown to dark brown, finely verruculose, aseptate.

Culture characteristics – Colonies on PDA reaching 35 mm diameter after 1 weeks at 25°C, colonies from above: circular, margin entire, dense, slightly raised, fairy fluffy appearance, cream; reverse: pale brown.

Material examined – THAILAND, Chiang Rai Province, dead twigs attached to Cananga odorata (Annonaceae), 2 January 2019, N. I. de Silva, CO10 (MFLU 21-0241), living culture, MFLUCC 21-0173.

Known hosts and distribution – On dead leaves of Ficus altissima, F. virens and F. benjamina in Thailand (Wang et al. 2008), on decaying pod of Peltophorum sp. in Thailand (Jayasiri et al. 2019), on decaying cone of Magnolia grandiflora in Thailand (Jayasiri et al. 2019), on dead leaves of Macaranga tanarius in Taiwan (Tennakoon et al. 2021), on dead twigs of Cananga odorata in Thailand (this study).

GenBank numbers – ITS: OL966948, LSU: OL830814, tef1: *******.

Notes – The morphology characteristics of our collection resembles Periconia byssoides in having macronematous, mononematous, unbranched, erect, light brown to dark brown conidiophores and globose to subglobose, light brown to dark brown, verruculose, aseptate conidia (Persoon 1801, Jayasiri et al. 2019, Tennakoon et al. 2021). Multi-gene phylogeny also indicates that our collection clusters with other Periconia byssoides isolates in 84% ML, 0.96 BYPP supported clade (Fig. **). Therefore, we report our collection as a new host record of Periconia byssoides from Cananga odorata in Thailand. Periconia byssoides seems to have diverse distribution, since they have been recorded in various host species (Wang et al. 2008, Jayasiri et al. 2019, Tennakoon et al. 2021).

Figure * Periconia pseudobyssoides (MFLU 21-0241) a The specimen. b, c Appearance of colonies on substrate. d Conidiophore with conidia. e Part of conidiophore with conidia. f Conidiogenesis cells and conidia. g–j Conidia. Scale bars: a = 2 mm, b, c = 0.2 mm, d = 50 μm, e = 20 μm, f = 10 μm, g–j = 5 μm.