Pleosporales - CBS - KNAW

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Fungal Diversity Dubitatio Speg., Anal. Soc. cient. argent. 12: 212 (1881). (Arthopyreniaceae (or Massariaceae)) Generic description Habitat terrestrial, saprobic. Ascomata medium-sized, solitary, densely scattered, or in small groups of 2–4, immersed, covered with white crystaline rim, papillate, ostiolate. Hamathecium of dense pseudoparaphyses, long, 2–3 μm broad, branching and anastomosing. Asci cylindrical, pedicellate, with furcate pedicel. Ascospores 1-septate, asymmetrical, reddish to dark brown. Anamorphs reported for genus: Aplosporella-like (Rossman et al. 1999). Literature: Barr 1979b, 1987b; Müller and von Arx 1962; Rossman et al. 1999; Spegazzini 1881. Type species Dubitatio dubitationum Speg., Anal. Soc. cient. argent. 12: 212 (1881). (Fig. 29) Ascomata 350–530 μm high×550–700 μm diam., solitary, densely scattered, or in small groups of 2–4, immersed, with a protruding papilla, 110–160 μm high, 160–250 μm diam., globose or subglobose, black, covered with white crystalline material which becomes hyaline and gel-like in water, ostiolate (Fig. 29a and b). Peridium 18–25 μm thick laterally (excluding the rim), up to 35 μm thick at the apex, thinner at the base, 1-layered, composed of small pale brown thin-walled cells of textura prismatica, cells 5–12×3–5 μm diam., cell wall up to 1 μm thick, apex cells smaller and walls thicker (Fig. 29b). Hamathecium of dense, long pseudoparaphyses, 2–3 μm broad, branching and anastomosing between and above the asci. Asci 150–190(−230)×12.5–15 μm (x ¼ 172:5 13:4mm, n =10), (6-)8-spored, rarely 4- spored, bitunicate, fissitunicate, cylindrical, with a furcate pedicel which is up to 40 μm long, ocular chamber not observed (Fig. 29c, d and e). Ascospores 19–22.5×10– 12 μm (x ¼ 20:2 11:4mm, n=10), uniseriate to obliquely uniseriate and partially overlapping, broadly ellipsoid with broadly to narrowly rounded ends, reddish brown, 1-septate, constricted at septum, asymmetric with a larger upper cell, thick-walled, possibly distoseptate (Fig. 29f, g and h). Anamorph: Aplosporella-like (for detailed description see Rossman et al. 1999). Conidiomata globose, ca. 300 μm diam. Conidia holoblastic, broadly fusoid, 13–15×7–10 μm, dark brown, finely spinulose (Rossman et al. 1999). Material examined: ARGENTINA, Buenos Aires, Tuyu, on Celtis tala Gill., Jan. 1881, leg. det. C. Spegazzini (NY, isotype; LPS, holotype). Notes Morphology When established Dubitatio, Spegazzini (1881) considered it as intermediate between Sphaeriaceae and Nectriaceae as has been mentioned by Rossman et al. (1999). Müller and von Arx (1962) treated Dubitatio as a synonym of Passerinula, while the differences of ascomata and ascospores could easily distinguish these two genera (Rossman et al. 1999). After checking the type specimen, Dubitatio was assigned to Dothideomycetes, and considered closely related to Dothivalsaria in the Massariaceae (Barr 1979b, 1987b). Dubitatio chondrospora was assigned to Pseudomassaria (as P. chondrospora (Ces.) Jacz.) (Barr 1964; Müller and von Arx 1962). Phylogenetic study None. Concluding remarks The black ascomata with white crystalline covering and central white ostiolar region as well as the asymmetrical reddish brown ascospores are striking characters of Dubitatio dubitationum. The genus cannot be assigned to any family with certainty based on morphological characters and fresh collections are needed for sequencing. Entodesmium Reiss, Hedwigia 1: 28 (1854). (Phaeosphaeriaceae) Generic description Habitat terrestrial, saprobic (or parasitic?). Ascomata scattered or in small groups, immersed, papillate, ostiolate, periphysate. Peridium thin, comprising one cell type of pigmented pseudoparenchymatous cells. Hamathecium of dense, long pseudoparaphyses, septate, embedded in mucilage. Asci 8-spored, bitunicate, fissitunicate, cylindrical, with furcate pedicel. Ascospores ellipsoid to filliform, multiseptate, deeply constricted at the primary septum (usually near apex), breaking into partspores. Anamorphs reported for genus: none. Literature: von Arx and Müller 1975; Barr1992b; Eriksson 1967a; b; Holm1957; Liewetal.2000; Shoemaker 1984a, b. Type species Entodesmium rude Reiss, Hedwigia 1: 28 (1854). (Fig. 30) Ascomata 160–250 μm high×150–300 μm diam., in groups, immersed with long and protruding cylindrical papilla, globose to subglobose, black, coriaceous (Fig. 30a). Papilla 100–220 μm long, 70–120 μm broad, cylindrical, with periphysate ostiole. Peridium 25–33 μm wide, comprising pseudoparenchymatous cells, cells up to 10×7.5 μm diam., cell wall up to 2 μm thick, beak cells smaller and wall thicker
Fungal Diversity Fig. 29 Dubitatio dubitationum (from NY, isotype; LPS, holotype). a Appearance of ascomata scattered on the host surface. Note the exposed white covering around the ostioles. b, c Section of an ascoma. (Fig. 30b and c). Hamathecium of dense, long pseudoparaphyses, septate, 2–3 μm wide, embedded in mucilage. Asci 100–175×8–13 μm (x ¼ 147:5 11:3mm, n =10), 8- spored, bitunicate, fissitunicate, cylindrical, with a furcate pedicel which is 18–50 μm long, and with a low ocular chamber (ca. 1μm wide×1 μm high) (Fig. 30e,f, g and h). Note the white covering (see arrow). d–f Cylindrical asci with short furcate pedicels. g, h Asymmetrical, 1-septate reddish-brown ascospores. Scale bars: a=1 mm, b=100 μm, c-e=50 μm, f–h=20 μm Ascospores 108–138×3–3.5 μm (x ¼ 123 3:2mm, n=10), filliform, brown, multi-septate, breaking into 22–28 partspores, 5–7×3–3.5 μm diam. (Fig. 30d). Anamorph: none reported. Material examined: GERMANY, Königstein, on stems of Coronilla varia L., 20 May 1895, W. Krieger (H, Krieger 1070).
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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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Page 21 and 22: Fungal Diversity Fig. 2 Aigialus gr
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Page 25 and 26: Fungal Diversity Literature: Berkel
Page 27 and 28: Fungal Diversity Ascorhombispora L.
Page 31 and 32: Fungal Diversity Fig. 8 Astrosphaer
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Page 35 and 36: Fungal Diversity Notes Morphology B
Page 37 and 38: Fungal Diversity Generic descriptio
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Page 41 and 42: Fungal Diversity Fig. 14 Bimuria no
Page 43 and 44: Fungal Diversity Fig. 15 Bricookea
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Page 47 and 48: Fungal Diversity Notes Morphology B
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Page 73 and 74: Fungal Diversity Fig. 33 Hadrospora
Page 75 and 76: Fungal Diversity Fig. 34 Halotthia
Page 77 and 78: Fungal Diversity Notes Morphology H
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Fungal Diversity cell wall
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Fungal Diversity Fig. 60 Mixtura sa
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Fungal Diversity Fig. 61 Montagnula
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Fungal Diversity spored, bitunicate
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Fungal Diversity Fig. 64 Murispora
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Fungal Diversity Type species Neoph
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Fungal Diversity brown, 8-septate,
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Fungal Diversity Fig. 68 Ohleria mo
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Fungal Diversity Fig. 69 Ohleriella
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Fungal Diversity Fig. 70 Ophiobolus
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Fungal Diversity Type species Ostro
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Fungal Diversity
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Fungal Diversity (Shoemaker and Bab
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Fungal Diversity ium thin, composed
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Fungal Diversity Fig. 76 Platysporo
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Fungal Diversity Fig. 77 1 Pleomass
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Fungal Diversity Fig. 78 Pleophragm
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Fungal Diversity papillate, ostiola
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Fungal Diversity Williams 1963; Mal
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Fungal Diversity Generic descriptio
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Fungal Diversity composed of one ce
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Fungal Diversity Fig. 84 Saccharico
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Fungal Diversity and nearly black a
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Fungal Diversity dense, long trabec
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Fungal Diversity
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Fungal Diversity
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Fungal Diversity Anamorphs reported
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Fungal Diversity
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Fungal Diversity
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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 spores are actuall
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Fungal Diversity Fig. 100 Sporormie
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Fungal Diversity
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Fungal Diversity Fig. 102 Kriegerie
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Fungal Diversity Phylogenetic study
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Fungal Diversity Fig. 104 Zeuctomor
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Fungal Diversity Fig. 105 Muroia ni
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Fungal Diversity pseudoparenchymato
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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 monoceras Alcorn n
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Fungal Diversity tomataceae, Melano
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Fungal Diversity Table 4 (continued
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Fungal Diversity 1987b). Based on a
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Fungal Diversity only do so under v
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Fungal Diversity Dennis RWG (1968)
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Fungal Diversity Kirk PM, Cannon PF
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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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