dikaryophyses (hyphidia). Branched dikaryo-
physes are known, for example, inDacrymyces
enatusandDacrymyces ovisporus(Fig.13.8d).
Conspicuously branched dikaryophyses, den-
drohyphidia, are found inDacrymyces dendro-
calami (Fig. 13.8b), Dacrymyces macnabbii
(Reid 1974 ),Dacrymyces paraphysatus, andU.
unispora(Fig.13.8e).
As mentioned previously, basidial ontogeny
and morphology are the most distinctive char-
acters of Dacrymycetes (Figs.13.1,13.3,and
13.7). Deviations, as inU. unispora,arevery
rare. D. ovisporus(Fig.13.8d) clearly bridges
the gap to typical dacrymycetaceous basidia.
In addition, the majority ofbasidiospores
share common characters, i.e., transverse septa-
tion in mature stages and germination with
microconidia or hyphae but not with secondary
spores (Fig.13.9b–f, h). Exceptionally, septation
of basidiospores is lacking, as inCerinomyces
crustulinus(Fig.13.9a),Cerinomyces canadensis,
and Cerinomyces pallidus. In addition, most
species share cylindrical to allantoid basidios-
pores, while subglobose ones are restricted toFig. 13.4(a,b) Transmission electron micrographs
showing dolipores ofDacrymyces stillatuswith contin-
uous parenthesomes on both sides of pores and central
bandings of different electron-dense structures inside
pores. (a) Upper parenthesome contains central pore.
Bar¼0.5mm. Originals F. OberwinklerDacrymycetes 361