Pleosporales - CBS - KNAW

Fungal Diversity
Fig. 10 Barria piceae (from
NY 92003, isotype). a Ascoma
on the host surface. Note the
wide opening ostiole. b Section
of the partial peridium with two
types of cells. c, d Asci with
ocular chambers and short pedicels.
e, f Ellipsoid ascospores
which are turning brown with
thin sheath around them. Scale
bars: a=0.5 mm, b=50 μm, c,
d=20 μm, e, f=10 μm
Ascomata 240–370 μm high×200–320 μm diam.,
solitary, scattered, immersed, globose, subglobose, coriaceous,
apex with or without papilla and with a pore-like
ostiole (Fig. 10a). Peridium 20–35 μm thick, comprising
two cell types, the outer cells comprising 3–4 layers of
brown pseudoparenchymatous cells, cells 4–5 μm diam.,
cell wall 2–3 μm thick, inner cells comprising 3–4 layers of
pale brown compressed cells, cells 2×16 μm diam., cell
wall 0.5–1.5 μm thick (Fig. 10b). Hamathecium of dense,
long cellular pseudoparaphyses, 2–3 μm broad, septate.
Asci 135–200(−220)×14–20 μm (x ¼ 156 16:6mm, n=
10), 8-spored, bitunicate, fissitunicate, cylindrical to clavate,
with a short, furcate pedicel, up to 22 μm long, with a
large ocular chamber (ca. 4μm wide×3 μm high) (Fig. 10c
and d). Ascospores 19–21.5×10–12 μm (x ¼ 20:4 11mm,
n=10), uniseriate to partially overlapping, ellipsoid, hyaline
or greenish with numerous small guttules at first and olive
green to smoky brown at maturity, 1-septate, strongly
constricted at the septum, foveolate, surrounded with sheath
(Fig. 10e and f).
Anamorph: none reported.
Material examined: CHINA, Xinjiang Province, Uygur,
Urumqi, Tianshan Mountain, on needles of Picea schrenkiana,
1 Jul. 1992, Z.Q. Yuan (NY 92003, isotype).