Pleosporales - CBS - KNAW

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