Pleosporales - CBS - KNAW

Fungal Diversity
Fig. 39 Kalmusia ebuli (from BR 101525–63, holotype). a Immersed
to erumpent ascomata scattered on the host surface. b Section
of a partial peridium. Note the compressed peridium cells. c Section of
an ascoma. d–f Eight-spored asci with long pedicels. g Partial ascus in
pseudoparaphyses. h, i Ascospores with 3 thick-walled septa. Scale
bars: a=0.5 mm, b=50 μm, c=100 μm, d–g=20 μm, h, i=10 μm
Material examined: Fries, Suecia (received by herbarium
in 1834) (PH 01048835, type, as Sphaeria rhodostoma
Alb. & Schwein.).
Notes
Morphology
Karstenula is an ambiguous genus, which has been
synonymized under Pleomassaria (Lindau 1897; Winter
1885). Some of the ascomata characters are even comparable
with those of Didymosphaeria, such as ascomata
seated in subiculum or beneath a clypeal thickening, the
development of apex vary in a large degree, even to the
occasional formation of a blackened internal clypeus, and
sometimes apical cells become reddish or orange-brown
(Barr 1990a). Barr (1990a) redefined the concept of
Karstenula (sensu lato), which encompasses some species
of Thyridium. In her concept, however, Barr (1990a)
treated Karstenula as having trabeculate pseudoparaphyses
and this is clearly not the case. In most cases the