Pleosporales - CBS - KNAW

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Fungal Diversity Phylogenetic study None. Concluding remarks Its small-sized ascomata, broadly cylindrical to slightly obclavate asci with a short, thick, knob-like pedicel, as well as its monocotyledonous host preference point Metameris to the Phaeosphaeriaceae. But DNA comparisons are needed for confirmation. Mixtura O.E. Erikss. & J.Z. Yue, Mycotaxon 38: 203 (1990). (Phaeosphaeriaceae) Generic description Habitat terrestrial, parasitic. Ascomata small-sized, scattered or clustered on the leaf spots, immersed, erumpent, minutely papillate, ostiolate. Papilla slightly raised. Peridium thin, comprising one cell type of lightly pigmented thin-walled cells of textura angularis. Hamathecium of dense, filliform, septate, cellular pseudoparaphyses, 4– 6.3 μm broad, embedded in mucilage. Asci bitunicate, ovoid, with a very short stumpy pedicel. Ascospores fusoid to narrowly fusoid with broadly to narrowly rounded ends, curved, dark brown, multi-septate, distoseptate, with a germ pore at the lower end. Anamorphs reported for genus: none. Literature: Eriksson and Yue 1990. Type species Mixtura saginata (Syd.) O.E. Erikss. & J.Z. Yue, Mycotaxon 38: 203 (1990). (Fig. 60) ≡ Leptosphaeria saginata Syd., Annls mycol. 37: 376 (1939). Producing elongated yellow spots with brownish margins, leaf spots up to 45×3–5 mm, opposite side visible as a brownish spots (Fig. 60a). Ascomata 170–200 μm high×210– 280 μm diam., scattered on the lower side of the leaf, immersed, erumpent, breaking through the epidermis, minutely papillate. Papilla central, slightly raised, ostiolate, ostiole surrounded by a white margin (Fig. 60b). Peridium 22–34 μm wide, thicker at the apex, thinner at the base, comprising one cell type of lightly pigmented thin-walled cells of textura angularis, cells up to 6×8 μm diam., cell wall 0.5–1.2 μm thick, apex cells smaller and walls thicker (Fig. 60c). Hamathecium of dense, filliform, septate, cellular pseudoparaphyses, 4–6.3 μm broad, embedded in mucilage. Asci 80–128×41–53(−69) μm (x ¼ 100:9 52:8mm, n =10), 8-spored, bitunicate, fissitunicate dehiscence not observed, sac-like, with a very short stumpy pedicel and a small ocular chamber (Fig. 60d). Ascospores 86–94(−106)×20.5–23.5 μm (x ¼ 92:7 21:7mm, n=10), fasciculate, fusoid to narrowly fusoid, slightly curved, dark brown, 7-septate, distoseptate, with or without constriction at the primary septum, smoothwalled, with a germ pore at the lower end (Fig. 60e and f). Anamorph: none reported. Material examined: ECUADOR, Tungurahua, Hacienda San Antonio pr. Baños, Province, on the leaves of Chusqueae serrulatae Pilger., 9 Jan. 1938, H. Sydow. (S reg. nr F8934 type, F8935isolectotype, asLeptosphaeria saginata). Notes Morphology Mixtura was formally established by Eriksson and Yue (1990) as a monotypic genus represented by M. saginata basedonitsimmersedandthin-walledascomata, sparse, broad pseudoparaphyses, sac-like asci with a short pedicel and thick apex. Mixtura has a “mixture” of characters found in other pleosporalean genera. The peridium structure is comparable with Phaeosphaeria, the ascospores with Trematosphaeria and asci with Wettsteinina (Eriksson and Yue 1990).Accordingtothe structure of ascomata and hamathecium, Mixtura was provisionally assigned to Phaeosphaeriaceae (Eriksson and Yue 1990). Phylogenetic study None. Concluding remarks Morphologically, the sparse broad pseudoparaphyses and sac-like asci with a thick apical structure in Mixtura seem more comparable with the generic type of Teratosphaeria (T. fibrillose Syd. & P. Syd., Teratosphaeriaceae, Capnodiales, Dothideomycetidae) than that of Phaeosphaeria (P. oryzae). The heavily pigmented, multi-septate ascospores and the persistent pseudoparaphyses of Mixtura however, differ from those of Teratosphaeria. Thus, here we assign Mixtura under Teratosphaeriaceae as a distinct genus until phylogenetic work is carried out. Montagnula Berl., Icon. fung. (Abellini) 2: 68 (1896). (Montagnulaceae) Generic description Habitat terrestrial, saprobic. Ascomata small- to mediumsized, immersed to erumpent, gregarious or grouped, globose to subglobose, black. Hamathecium of dense, narrowly cellular, septate pseudoparaphyses. Asci bitunicate, fissitunicate, usually cylindro-clavate to clavate with a long pedicel. Ascospores oblong to narrowly oblong, straight or somewhat curved, reddish brown to dark yellowish brown, muriform or phragmosporous. Anamorphs reported for genus: Aschersonia (Hyde et al. 2011).
Fungal Diversity Fig. 60 Mixtura saginata (from S reg. nr F8934, type). a, b Leaf spots in leaves of Chusquea serrulatae. Note the erumpent ascomata surrounded by white material in (b). c Section of an ascoma. Note the peridium structure which comprises cells of textura angularis. The arrangement of the asci and pseudoparaphyses can also be seen. d Immature asci in pseudoparaphyses. Note the stumpy pedicel and thickened apex with flattened ocular chamber. e, f Mature ascospores. Note the hyaline ends and distosepta. Scale bars: a=10 mm, b, c= 100 μm, d=50 μm, e–f=20 μm Literature: Aptroot 1995; Barr2001; Berlese1896; Clements and Shear 1931; Crivelli1983; Leuchtmann 1984; Ramaley and Barr 1995; Schoch et al. 2006; Wehmeyer1957, 1961; Zhang et al. 2009a. Type species Montagnula infernalis (Niessl) Berl., Icon. fung. (Abellini). 2: 68 (1896). (Fig. 61) ≡ Leptosphaeria infernalis Niessl, Inst. Coimbra 31: 13 (1883). Ascomata 220–280 μm high×250–310 μm diam., immersed to erumpent, gregarious or clustered, globose to subglobose, sometimes triangular in dried material, short ostiole always filled with hyaline closely adhering cells, black (Fig. 61a and b). Peridium 40–55 μm thick at sides, up to 80 μm thick near the apex, 3-layered, outer layer composed of heavily pigmented thick-walled small cells of textura angularis, cells3–8 μm diam., wall 1.5–3 μm thick, apex thicker with smaller cells and thicker cell wall, thinner near the base; mid layer less pigmented, cells 4–13 μm diam.; innermost layer of narrow compressed rows of cells, merging with
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Fungal Diversity DOI 10.1007/s13225
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Fungal Diversity Table 1 Major circ
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Fungal Diversity
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Fungal Diversity biocontrol agent o
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Fungal Diversity substrates and man
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Fungal Diversity 2. To investigate
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Fungal Diversity Table 3 (continued
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Fungal Diversity Fig. 2 Aigialus gr
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Fungal Diversity Fig. 3 Amniculicol
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Fungal Diversity Literature: Berkel
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Fungal Diversity Ascorhombispora L.
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Fungal Diversity Fig. 8 Astrosphaer
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Fungal Diversity Fig. 9 Asymmetrico
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Fungal Diversity Notes Morphology B
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Fungal Diversity Generic descriptio
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Fungal Diversity Anamorph: none rep
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Fungal Diversity Fig. 14 Bimuria no
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Fungal Diversity Fig. 15 Bricookea
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Fungal Diversity Fig. 16 Byssolophi
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Fungal Diversity Notes Morphology B
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Fungal Diversity the reaction of pe
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Fungal Diversity Fig. 21 Chaetomast
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Fungal Diversity Fig. 23 Cilioplea
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Fungal Diversity with one or two ve
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Fungal Diversity Moreau 1953; Munk
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Fungal Diversity Material examined:
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Fungal Diversity Fig. 28 Dothidotth
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Fungal Diversity Anamorphs reported
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Fungal Diversity Fig. 94 Westerdyke
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Fungal Diversity Fig. 95 Wettsteini
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Fungal Diversity Fig. 96 Wilmia bra
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Fungal Diversity Current name: Astr
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Fungal Diversity Fig. 100 Sporormie
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Fungal Diversity Fig. 102 Kriegerie
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Fungal Diversity Phylogenetic study
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Fungal Diversity Fig. 105 Muroia ni
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Fungal Diversity Eremodothis Arx, K
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Fungal Diversity Type species: Macr
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Fungal Diversity ascospores of Plat
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Fungal Diversity 1987b). Based on a
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Fungal Diversity Dennis RWG (1968)
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Fungal Diversity Saccardo PA (1880)
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Fungal Diversity Winter G (1887) As
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Pleosporales - CBS - KNAW

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