Arzanlou et al. Fig. 26. Veronaea compacta (<strong>CBS</strong> 268.75). A–B. Semi-micronematous conidiophores <strong>and</strong> sympodially proliferating conidiogenous cells. C–D. Rachis with hardly prominent denticles. E. Conidia. Scale bar = 10 µm. Fig. 27. Veronaea japonica (<strong>CBS</strong> 776.83). A. Intercalary conidiogenous cells. B–D. Semi-micronematous conidiophores <strong>and</strong> sympodially proliferating conidiogenous cells. E. Conidia. F. Thick-walled, dark brown hyphal cells. Scale bar = 10 µm. Veronaea japonica Arzanlou, W. Gams & Crous, sp. nov. MycoBank MB504557. Figs 17B, 27. Etymology: Named after the country of origin, Japan. Veronaeae compactae similis, sed cellulis inflatis, aggregatis, crassitunicatis, fuscis in vitro formatis distinguenda. In vitro: Submerged hyphae subhyaline, smooth, thin-walled, 1.5–3 µm wide; aerial hyphae slightly narrower, pale brown; hyphal cells later becoming swollen, thick-walled, dark brown, often aggregated. Conidiophores slightly differentiated from aerial vegetative hyphae, lateral, or terminal, often wider than the supporting hypha, 2–3 µm wide, up to 65 µm long, unbranched or occasionally branched, 82
Ramichloridium <strong>and</strong> allied genera Fig. 28. Pleurothecium obovoideum (<strong>CBS</strong> 209.95). A–C. Conidial apparatus consisting of conidiophores with sympodially proliferating conidiogenous cells as seen in slide cultures of ca. 14 d. D. Short chain of conidia. E–G. Sympodially proliferating conidiogenous cells, resulting in a short rachis with subcylindrical to cylindrical denticles. H. Conidia. Scale bar = 10 µm. pale brown, thin-walled, smooth, with 1–3 additional septa. Conidiogenous cells terminal, occasionally intercalary, variable in length, up to 15 µm long, pale brown, cylindrical to clavate, with hardly prominent denticles; scars flat, slightly pigmented, not thickened, about 0.5 µm diam. Conidia solitary, pale brown, smooth, thin-walled, ellipsoidal to ovoid, (0–)1-septate, often constricted at the septum, (6–)7–8(–10) × 2–2.5(–4) µm, with a round apex <strong>and</strong> truncate base; hilum unthickened but slightly darkened, about 1 µm diam. Cultural characteristics: Colonies rather slow growing, reaching 7.5 mm diam on MEA after 14 d at 24 °C; surface velvety to lanose, slightly raised in the centre, olivaceous-brown, with entire margin; reverse dark-olivaceous. Specimen examined: Japan, Kyoto, Daitokuji Temple, Kyoto, inside dead bamboo culm, Dec. 1983, W. Gams, holotype <strong>CBS</strong>-H 3490, ex-type culture <strong>CBS</strong> 776.83. Note: This species is morphologically <strong>similar</strong> to V. compacta (Papendorf 1976), but can be distinguished based on the presence of dark brown, swollen hyphal cells in culture, which are absent in V. compacta. Pleurothecium obovoideum clade (Chaetosphaeriales) Ramichloridium obovoideum was regarded as <strong>similar</strong> to “Ramichloridium” (Rhinocladiella) mackenziei by some authors, <strong>and</strong> subsequently reduced to synonymy (Ur-Rahman et al. 1988). However, R. obovoideum clusters with Carpoligna pleurothecii, the teleomorph of Pleurothecium Höhn. Because it is also morphologically <strong>similar</strong> to other species of Pleurothecium, we herewith combine it into that <strong>genus</strong>. Pleurothecium obovoideum (Matsush.) Arzanlou & Crous, comb. nov. MycoBank MB504558. Fig. 28. Basionym: Rhinocladiella obovoidea Matsush., Icones Microfung. Mats. lect.: 123. 1975. ≡ Ramichloridium obovoideum (Matsush.) de Hoog, Stud. Mycol. 15: 73. 1977. In vitro: Submerged hyphae smooth, hyaline, thin-walled, 1–2 µm wide; aerial hyphae hyaline to subhyaline, smooth. Conidiophores arising vertically from creeping hyphae, ascending hyphae thickwalled <strong>and</strong> dark brown; conidiophores 10–35 µm long, 1–2-septate, often reduced to a conidiogenous cell, unbranched, thick-walled, smooth, tapering towards the apex, pale brown. Conidiogenous cells integrated, cylindrical to ampulliform, 5–20 µm long, pale brown, elongating sympodially, with a short rachis giving rise to denticles, 1 µm long, slightly pigmented. Conidia aseptate, solitary or in short chains of up to 3, smooth, pale brown, ellipsoidal to obovate, (9–)11–12(–14.5) × (3–)4(–5) µm, smooth, thin-walled, with a more or less rounded apex, a truncate base <strong>and</strong> a slightly darkened, unthickened hilum, 1.5 µm diam. www.studiesinmycology.org 83
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Studies in Mycology 58 (2007) The g
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Studies in Mycology The Studies in
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CONTENTS P.W. Crous, U. Braun and J
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lectotype for the genus by Clements
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Schubert K (2005a). Morphotaxonomic
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Crous et al. Table 1. Isolates for
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Crous et al. 100 10 changes 65 100
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Trimmatostroma salicis, 3 t , 5, 6