Leaf-inhabiting genera of the Gnomoniaceae, Diaporthales - CBS

So g o n o v e t a l.
Fig. 7. Culture morphology. A–O. Gnomonia neognomon. A–F. CBS 121244. G–L. CBS 121265. M–O. Ex-type CBS 121246. P–X. G. orcispora. P–S. AR 4286. T–X. CBS
121247. A–L, P–S, U–X. Colony habit, 40 d, 23 ºC. A, C, E, G, I, K, P, R, U, W. Surface. B, D, F, H, J, L, Q, S, U, X. Reverse. M–O, T. Perithecia, 2/10 ºC. M, N, T. 4.5 mo. O. 8
mo. A, B, G, H, P, Q, U, V. PDA. C, D, I, J, N, R, S, W, X. MEA. E, F, K– M, O, T. MYA. Scale: A–L, P–S, U–X. 1 cm. M–O, T. 200 μm.
longitudo latitudoque similares G. gnomon, sed perithecii rostris
longioribus et semper eccentricis differt. Holotypus: BPI 877465A.
Anamorph: Unknown.
Etymology: Refers to the morphological similarity with G. gnomon.
Perithecia solitary, without stroma, hypophyllous, loosely scattered
on blades and veins, immersed at first, erumpent at maturity, black,
suboblate when moist, 170–250 µm high × 220–370 µm diam,
concave when dry. Necks eccentric, straight or slightly sinuous,
400–1075 µm long, 35–52 µm wide at base, 31–40 µm wide at
apex. Asci fusiform, (39.5–)41–44.5(–48.5) × (8–)9–11(–12.5) µm
(mean = 43.5 × 10, SD 3, 1.5, n=13), apical ring 1.5–3 µm diam, with
eight parallel ascospores. Ascospores fusiform, slightly curved, (18.5–
)20–22.5(–24.5) × 2–2.5 µm (mean = 21.5 × 2, SD 1.5, 0.2, n=29), l:w
(7.9–)9.7–10.8(–12.7) (mean = 10.2, SD 1, n=29), two-celled, slightly
constricted at septum, septum located at (45–)49–52(–57) % (mean
= 50, SD 3, n=29) of ascospore length, cells tapering, at ends blunt,
rounded, each cell with 4–7, guttules, usually one large guttule close
to septum; appendages usually 2.5–4 µm long, cuneiform, sometimes
absent, sometimes whip-shaped, to 16 µm long.
Cultures: Colonies on PDA attaining 35 mm diam after 40 d at 23 °C,
radially furrowed, velvety, greyish orange to brownish orange, with
droplets of clear exudate; margin well-defined, wavy; reverse dark
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