Pleosporales - CBS - KNAW

Fungal Diversity
Fig. 6 Ascorhombispora aquatica (from HKU(M) 10859, holotype).
a Section of an ascoma. b Section of a partial peridium. c Immature
ascus. d–f Mature asci with ascospores. Note the deliquescent ascal
wall in f. Note the wide, dark band in the medium septum of
ascospores in d and e and the mucilaginous sheath and paler end cells
in e and f. Scale bars: a=20 μm, b–f=15 μm (figures referred to Cai
and Hyde 2007)
subglobose, not easily removed from the substrate, wall black,
coriaceous, roughened, apex usually widely porate, with or
without papilla (Fig. 7a). Peridium 70–90 μm wide, thicker
near the base where it is up to 180 μm wide, comprising two
cell types, outer cells composed of heavily pigmented
small cells, cells 3–5 μm diam., inner layer composed of
less pigmented cells of textura angularis, 10–20 μm
diam. (Fig. 7b and c). Hamathecium of dense, septate, 2–
3 μm broad, pseudoparaphyses which branch and anastomosing
frequently between and above asci (Fig. 7d). Asci
(180-)200–280×28–43 μm (x ¼ 230 35mm, n=10), 8-
Fig. 7 Asteromassaria macrospora (from L, 1004). a Ascomata
clustered in a group breaking through the host surface. b Section of an
ascoma. c Section of a partial peridium. Note the cells of textura
angularis. d Pseudoparaphyses. Note the branches. e Upper part of the
ascus illustrating the ocular chamber. f Ascus with a short pedicel. g–j
Ascospores. Note the mucilaginous sheath in G and minutely verruculose
ornamentation in J. Scale bars: a=0.5 mm, b, c=100 μm, d–j=10 μm
b