Pleosporales - CBS - KNAW

Fungal Diversity
Fig. 14 Bimuria novae-zelandiae (from CBS 107.79, isotype). a–c
Asci with a short pedicel and small ocular chamber. d Immature ascus
(in cotton blue). e Partial ascospore. Note the convex verrucae on the
ascospore surface. f Released ascospores. Note the lighter end cells,
germ pore and the longiseptum (arrowed). g Fissitunicate ascus
dehiscent. Scale bars: a–g=20 μm
young, turning dark brown to black when mature, ostiolate,
the ostiole more or less sessile or raised into a very short neck.
Peridium 5–8(-12) μm thick, comprising 2–3 layers of
radically compressed pseudoparenchymatous cells, cells 10–
15 μm diam. in surface view, cell wall 2–3 μm thick.
Hamathecium consisting of few, 2.5–4 μm broad cellular
pseudoparaphyses, embedded in mucilage, rarely anastomosing
and branching, septate, 7–13 μm long between
two septa. Asci (65-)80–95×20–32.5 μm (x ¼ 75:6
29:4mm, n=10), (1-)2(-3)-spored, bitunicate, fissitunicate,
broadly clavate, with a short and small knob-like pedicel
which is up to 13 μm long, ocular chamber best seen in
immature asci (Fig. 14a, b, c, d and g). Ascospores
accumulating in a subglobose black shiny mass adhering
together outside the ostiole, 55–68×25–28 μm (x ¼ 59
26mm, n=10), broadly ellipsoid but becoming narrowed
towards the poles, muriform with (5-)7 transverse septa, cells
with (0-)l(-2) longitudinal septa in each cell, no constriction