Pleosporales - CBS - KNAW

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Fungal Diversity Fig. 42 Keissleriella sambucina (from FH, holotype of Otthiella aesculi). a Section of an ascoma. b Pseudoparaphyses which are narrow (less than 1.5 μm) and branch and anastomosing as trabeculate. c, d Hyaline ascospores with distinct constrictions at the septa. e Asci amongst narrow pseudoparaphyses. F. Ascus with a pedicel and ocular chamber. Scale bars: a=100 μm, b–f=10 μm thick at apex, of small very thick-walled cells. Hamathecium of cellular pseudoparaphyses, 2–2.5 μm broad (Fig. 43c and d). Asci 89–100×19–21 μm, 8-spored, bitunicate, fissitunicate, clavate, bumpy, short-stipitate, apex without obvious apical chamber (Fig. 43e). Ascospores 27–35×8.5–9.4 μm,, 2- 3-seriate, broadly fusoid with broadly rounded ends, straight to slightly curved, 1-septate, slightly constricted, with four large guttules, hyaline, smooth-walled, a very thin mucilaginous sheath can be occasionally observed in India ink but in most cases no sheath can be observed (Fig. 43f and g).
Fungal Diversity Anamorph: none reported. Material examined: FRANCE, Haute Garonne: Avignonet, Lac de Rosel, artificial lake, on bark and wood of a submerged branch Populus sp., 23 Nov. 2006, leg. Michel Delpont, det. Jacques Fournier (IFRD 2039, holotype). Notes Morphology Lentithecium was introduced to accommodate some freshwater fungi previous assigned under Massarina, suchasM. arundinacea (Sowerby) Leuchtm. and M. fluviatilis (Zhang et al. 2009a). It is characterized by its immersed and lenticular ascomata, thin peridium which is almost equal in thickness, short pedicellate asci and fusoid or filliform, hyaline or rarely lightly pigmented, 1- to multi-septate ascospores (Zhang et al. 2009b). Lentitheciaceae was introduced to accommodate Lentithecium and some other related taxa (Zhang et al. 2009a). Phylogenetic study The clade of Lentitheciaceae comprises the generic type Lentithecium fluviatile, as well as L. arundinaceum (Sowerby) K.D. Hyde, J. Fourn. & Yin. Zhang, Stagonospora macropycnidia, Wettsteinina lacustris (Fuckel) Shoemaker & C.E. Babc., Keissleriella cladophila, and the bambusicolous species Katumotoa bambusicola and Ophiosphaerella sasicola, which receive high bootstrap support (Zhang et al. 2009a). Concluding remarks Tingoldiago graminicola K. Hirayama & Kaz. Tanaka form a robust clade with species of Lentithecium (Shearer et al. 2009). Tingoldiago has lenticular immersed to erumpent ascomata, numerous and septate pseudoparaphyses, cylindro-clavate asci and hyaline, 1-septate ascospores with sheath. All of these characters fit Lentithecium well. We treat Tingoldiago as a synonym of Lentithecium. Leptosphaeria Ces. & De Not., Comm. Soc. crittog. Ital. 1: 234 (1863). (Leptosphaeriaceae) Generic description Habitat terrestrial, saprobic or parasitic. Ascomata small- to medium-sized, solitary, scattered or in small groups, erumpent to superficial, subglobose, broadly or narrowly conical, papillate, ostiolate. Peridium thick, comprising layers of cells of textura angularis. Hamathecium of dense cellular pseudoparaphyses, embedded in mucilage, anastomosing and branching. Asci 8-spored, bitunicate, fissitunicate unknown, cylindrical with a furcate pedicel and a large ocular chamber. Ascospores fusoid or narrowly fusoid, brown or reddish brown, 3-septate, constricted at each septum. Anamorphs reported for genus: Coniothyrium and Phoma (Hyde et al. 2011; Sivanesan 1984). Literature: von Arx and Müller 1975; Barr1987a, b; Cesati and de Notaris 1863; Crane and Shearer 1991; Dongetal. 1998; Eriksson 1967a; Eriksson and Hawksworth 1986, 1991; de Greuter et al. 1988; Hedjaroude1969; von Höhnel 1907;Holm1957, 1975;Huhndorfetal.1990; Luttrell 1973; Müller 1950; Munk 1957; Saccardo 1878b, 1883, 1891, 1895; Schochetal.2009; Shearer 1993; Shearer et al. 1990; Shoemaker 1984a; Sivanesan1984; Zhang et al. 2009a. Type species Leptosphaeria doliolum Ces. & De Not., Comm. Soc. crittog. Ital. 1: 234 (1863). (Fig. 44) ≡ Sphaeria doliolum Pers., Icon. Desc. Fung. Min. Cognit. (Leipzig) 2: 39 (1800). Ascomata 340–450 μm high×380–500 μm diam., solitary, scattered or in small groups, superficial, subglobose, broadly or narrowly conical, with a flattened base on the host surface, black, usually with 2–4 ring-like ridges surrounding the ascomata surface, apex with a conical, usually shiny papilla (Fig. 44a). Peridium 85–110 μm wide at sides, thinner at the apex, comprising two types of cells, outer layer composed of small thick-walled cells of textura angularis, cells
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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 Fig. 2 Aigialus gr
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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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Pleosporales - CBS - KNAW

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