Fructification of small groups of sessile, subglobose sporocarps or
short plasmodiocarps, ca. 0.4-1 mm Ø, plasmodiocarps up to ca. 2 mm
long; steel grey to dark greyisk brown with strong metallic lustre.
Inconspicuous, thin, membraneous, confluent under a group of sporocarps,
in us_sn_19841029 greyish brown and shining.
Thin, membranous; splitting irregularly at maturity, but ± persistent;
almost hyaline to pale smoky in TL; in RL with bluish to purplish
Rather sparse; thin, 1-3 µm broad threads running from base of sporocarp
to peridium, pale to medium greyish/olivaceous brown in TL, pale at
extremities; sparsely ± dichotomously branched, with few transverse
interconnections; almost smooth or with darker expansions.
Dark brown to almost black in RL, medium greyish/yellowish brown in TL,
globose, 15.5-18.2-20.6 µm Ø; ornamentation of ± cylindrical spines up
ca. 2 long, mostly regularly dstributed, many spines appearing ± curved
and with 'irregular' apices.
The danish finds are from rather different habitats: bark of Betula and
Fagus and from podetia of Cladonia.
Rare. Known from 3 finds: SW- and N-Jutland and N-Zealand.
Known reports from
Japan (Nannenga-Bremekamp & Yamamoto, 1983
China (Yamamoto et al., 2002
Great Britain (Ing , 1995
The diagnostic character of this taxon is the ornamentation of the spores,
described by the original authors
(Nannenga-Bremekamp & Yamamoto, 1983
as "... 1.5-1.8 µm long warts, which are sometimes forked or frayed at their apices."
The frayed apices was observed in SEM and are so small, that they are below the
resolution power of a mainstream light microscope. In sm_sh_sn20060325, however,
a certain 'irregularity' is clearly visible with an ordinary oil immersion
(100x / na 1.25) lens.
Description based on two collections: us_sn19841029 (herb. C) and
sm_sh_sn20060325 (herb. HFG).
Abbreviations: TL : transmitted light; RL : reflected light; Ø : diameter;
TBU : Danish Botanical Topographical District.
Colour-codes refer to: Kornerup, A. & J. H. Wanscher 1974: Farver i farver.
5th reprint. Politikens Forlag, Copenhagen.
When not otherwise indicated spore measurements are given as:
min-mean-max or (extreme-)min-mean-max(-extreme). Spore measurements are exclusive of ornamentation.
Line drawings are free hand sketches.
Distribution maps: Maps of Danish distributions are based on material seen
by the author. World distributions are based on
reports extracted from literature.