Conidia holoblastic, hyaline, guttulate, smooth, thick-walled, ellipsoid, aseptate, slightly curved, frequently slightly narrow at the middle, with obtuse apex; base tapering to flat protruding scar, (15–)17–19(–23) × (6.5–)7–8(–8.5) µm; on MEA, (14–)16–19(–22) × (6–)7–9(–11) µm. Ascospore germination: Ascospores germinate from the apical cell, with primary

GANT61 germ tubes forming near the apex; secondary germ tubes form later from the second cell, remaining hyaline; cell wall becoming slightly thicker, but not constricted at the septum, showing no distortion. Culture characteristics: Characteristics on MEA, PDA and OA of all three species of Pseudoplagiostoma are compared in Table 2 and Figs. 7, 8. Fig. 7 Pseudoplagiostoma spp. in culture after 15 d. a–c. Ps. eucalypti (CBS 115788). a. On OA. b. On MEA. c. On PDA. d–f. Ps. oldii (CBS 124808). d. On OA. e. On MEA; f. On PDA. g–i. Ps. variabile (CBS 113067). g.

On OA; h. On MEA; i. On PDA; g–i Fig. 8 Line drawing. Conidia of Pseudoplagiostoma spp. on MEA. a. Ps. eucalypti; b. Ps. oldii. c. Ps. variabile. Scale bar: = 10 µm Specimens examined: BIX 1294 VENEZUELA, on living leaves of Eucalyptus urophylla, Oct. 2006, M.J. Wingfield, holotype of Ps. eucalypti, CBS H-20303, cultures ex-type CPC 13341 = CBS 124807, CPC 13342, 13343. HAWAII, Kauai, on Eucalyptus grandis, 23 May 1978, C.S. Selleck LDN-193189 Hodges, holotype of Cryptosporiopsis eucalypti, IMI 237416 f. Pseudoplagiostoma oldii Cheewangkoon, M.J. Wingf. & Crous, sp. nov. Fig. 9 Fig. 9 Pseudoplagiostoma oldii. a. Conidiomata. b. Cross section though conidiomata; c–f. Conidia attached to conidiogenous cells with percurrent proliferation; g. Conidia; h. Conidiomata; i–j. Conidia and conidiogenous cells; k. Conidia; l. Germinating conidia. a–g: on PNA. h–l: on MEA. Scale bars: a, h = 800 µm, b = 100 µm, c–g, k–l = 20 µm, i–j = 15 µm; d applies to d–f; g applies to g, k–l; i applies to i–j MycoBank MB 516498. Etymology: Named for Australian forest pathologist, Dr Ken Old, who contributed substantially to an understanding of Eucalyptus diseases including the Cryptosporiopsis

disease complex. Oxaprozin Ascomata non vidimus. Species haec a Ps. eucalypti et Ps. variabili differt conidiomatibus (265–)285–300(–330) µm latis et (200–)220–250(–270) µm altis et conidiis maturitate brunneis in agaro extracto malti, (15–)17–20(–23) × (6–)7–8(–9) µm. Leaf spots amphigenous, subcircular to irregular, medium brown. Ascomata not observed. On PNA dark brown conidiomata appeared after 15 d in the dark; conidiomata acervular to pycnidial, with pale grey masses of conidia, subglobose to broadly ovoid, subcuticular to epidermal, separate, consisting of 3–5 layers of dark brown textura angularis, (265–)285–300(–330) µm wide, (200–)220–250(–270) µm high; central opening, (90–)110–120(–140) µm wide, wall 20–30 µm thick. Conidiophores absent.