Pleosporales - CBS - KNAW

Fungal Diversity
Fig. 67 Nodulosphaeria hirta (from BR 101945–95, holotype). a
Appearance of ascomata on the host surface. b Vertical section of an
ascoma. Note the setae at the apex and in the ostiole. c Section of a
partial peridium. Note the outer layer cells of textura angularis and
inner layer compressed cells. d Squash mount showing asci in
pseudoparaphyses. e, f. The light brown filiform ascospores. Scale
bars: a=0.5 mm, b=100 μm, c=50 μm, d=20 μm, e, f=10 μm
well as its brown and phragmosporous ascospores which
break into two parts at the median septum (Samuels 1980).
Some species of Ohleria are widespread. For instance, O.
brasiliensis is reported from New Zealand, Brazil as well as
United States (Samuels 1980). Ohleria has been considered
closely related to Sporormia and Preussia based on the
ascosporic characters, and several species of Ohleria, suchas
O. aemulans Rehm, O. haloxyli Kravtzev, O. silicata
Kravtzev and O. kravtzevii Schwarzman, have been transferred
to these genera. Clements and Shear (1931) treated
Ohleria as a synonym of Ohleriella, despite the fact that
Ohleriella is a coprophilous fungus. When the ascomata and
habitats are considered, Ohleria seems closely related to
Melanomma and Trematosphaeria (Samuels 1980).
Phylogenetic study
None.
Concluding remarks
To some degree, habitats show phylogenetic significance
(Zhang et al. 2009a). Thus, Ohleria seems less likely related
to Sporormia and Preussia. But its relationship with
Melanomma is uncertain, because of their differences in
hamathecium and ascospores.