Pleosporales - CBS - KNAW

Fungal Diversity
ium thin, composed of a few layers of textura
angularis. Hamathecium of numerous, cellular pseudoparaphyses,
anastomosing, septate. Asci bitunicate, fissitunicate,
cylindrical to cylindro-clavate, with a short,
furcate pedicel. Ascospores broadly ellipsoid, reddish
brown, muriform.
Anamorphs reported for genus: none.
Literature: Shoemaker and Babcock 1992; Wehmeyer
1961.
Type species
Platysporoides chartarum (Fuckel) Shoemaker & C.E.
Babc., Can. J. Bot. 70: 1650 (1992) (Fig. 76)
≡ Pleospora chartarum Fuckel, Jb. nassau. Ver. Naturk.
23–24: 133–134 (1870).
Ascomata 150–230 μm high×180–260 μm diam.,
scattered, immersed, semi-immersed to rarely superficial,
globose, subglobose, black, smooth; apex with a protruding
papilla, 50–85 μm long, 60–85 μm broad, ostiolate
(Fig. 76a and b). Peridium 8–22 μm wide, composed of
2–4 layers of brown cells of textura angularis, cells5–
9 μm diam., cell wall 1–2.5 μm thick, without periphyses.
Hamathecium of dense, long cellular pseudoparaphyses,
2–3 μm broad, anastomosing, septate (Fig. 76c). Asci
110–140×12.5–16.5 μm (x ¼ 121:5 14:7mm, n=10),
(6-)8-spored, bitunicate, fissitunicate, cylindrical to
cylindro-clavate, with a short, furcate pedicel, 8–17 μm
long, ocular chamber not observed (Fig. 76c, d and e).
Ascospores 20–26×8–11 μm (x ¼ 23:7 9mm, n=10),
obliquely uniseriate and partially overlapping, flattened,
broadly ellipsoid in front view, reddish brown, 3
Fig. 75 Phaeosphaeriopsis
glauco-punctata (from M.C.
Cooke 166). a Ascomata immersed
in the substrate. b Eightspored
cylindrical asci. c–f. Pale
brown baculate ascospores
which are released from asci.
Scale bars: a=200 μm,
b=20 μm, c, d–f=10 μm