Material examined: Taiwan, Chiayi, Ali Shan Mountain, Fanlu Township area, Dahu forest, dead leaves of Morus australis (Moraceae), 21 July 2019, D. S. Tennakoon, SV026A (MFLU 18-2585, holotype); ex-type living cultures, MFLUCC 18-1630, KUMCC 19-0130, ibid., 24 July 2019, SV026B (NCYU 19-0183, paratype); ex-paratype living culture, NCYUCC 19-0105, ibid., 27 July 2019, SV026C (NCYU 19-0335, paratype); ex-paratype living culture, NCYUCC 19-0300.

Saprobic on dead leaves of Morus australis. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Mycelium (on PDA) consisting of branched, septate, hyaline to brown, smooth to asperulate, thin-walled, 2–3 μm wide hyphae. Conidiophores inconspicuous, consisting of lateral, short cylindrical, 2–4 × 2–3 μm, hyaline to subhyaline pegs, producing terminally blastoconidia liberated rhexolitically. Conidiogenous cells mono or polyblastic, light brown, smooth, with upto 2 µm broad conidial attachment, with rhexolytic cesession. Conidia 13–16 × 6–7 µm (x¯ = 14.5 × 6.5 μm, n = 40), solitary, ellipsoidal, subcylindrical, pyriform or clavate, initially light brown, become dark brown at mature, verruculose to tuberculate, 2-septate, slightly constricted at septa, smooth-walled. Culture characteristics: Colonies on PDA, 25–30 mm diam. after 3 weeks, colonies from above: medium dense, circular, flat, surface slightly rough, entire edge, margin well-defined, cottony to fairly fluffy with sparse aspects, dark brown to black at the margin, greyish in the centre; reverse: greyish at the margin, light brown in the centre. Sporulated on PDA after 3 weeks incubation period in dark, at 25 °C.

Fresh specimens of Pseudopithomyces mori were collected from different places in Fanlu township area, Chaiyi. Phylogeny indicates that Pseudopithomyces mori sequences form a monophyletic clade that is sister to P. atro olivaceus (CBS 244.96) and P. diversisporus (UTHSC 06-4528). The statistical support for this relationship is 95% ML, 0.99 BYPP (Fig. 17). Pseudopithomyces mori differs from P. atro olivaceus in having 2-septate, smaller conidia (13–16 × 6–7 μm), whereas P. atro olivaceus has 3-6 septate, larger conidia (20–25 × 7.5 μm). Pseudopithomyces diversisporus can be distinguished from P. mori in having larger conidia (20–38 × 7–11 μm) (Ellis 1960; Crous et al. 2016b). GenBank numbers: MFLUCC 18-1630: LSU: MW063214; SSU: MW079343; ITS: MW063153; TEF1-α: MW183777. NCYUCC 19-0105: LSU: MW063215; SSU: MW079344; ITS: MW063154; TEF1-α: MW183778. NCYUCC 19-0300: LSU: MW063216; SSU: MW079345; ITS: MW063155; TEF1-α: MW183779.