Dacrymyces pinacearum Shirouzu & Tokum., sp. nov. — MycoBank
MB514038; Fig. 8f, g, 15d
Conidiomata sparsa, pulvinata vel flabellata, sessilia, aurantiaca, fragilia, 1
mm alta, 1–2 mm lata. Hyphae interaneae ramosae, tenuitunicatae, flavidae,
2–3 μm latae. Cellulae conidiogenae micronematicae, cylindricae, flavidae.
Conidia holoblastica, ramosa, dendroidea, cum ramis cylindricis 1–8-cellularibus
27–65 × 5–9 μm tenuitunicatis aurantiacis.
Etymology. Named after the family name of its host.
Conidiocarps scattered, pulvinate to flabellate, sessile, orange,
sometimes white at the lower-side, fragile, 1 mm high, 1–2 mm
diam. Internal hyphae branched, thin-walled, septate, pale
yellow, 2–3 μm diam, without clamp connections. Hymenium
limited to the orange part of the basidiocarp. Conidiogenous
cells micronematous, cylindrical, pale yellow. Conidia holoblastic,
branched, dendroid, composed of cylindrical, 1–8-celled
branches of 27–65 × 5–9 μm, thin-walled, orange.
Culture characteristics — Colonies attaining about 8 mm diam,
velvety, white to pale yellow. Conidiogenesis not observed.
Specimen examined. Japan, Nara, Oodaigahara, on a dead trunk of Abies
sp., 4 July 2006, T. Shirouzu, holotype TNS-F-21056 (HNo.418), culture
ex-type MAFF241182.
Notes — Dacrymyces pinacearum is characterised by pulvinate
to flabellate conidiocarps and holoblastic, dendroid conidia.
Coelomycetous anamorphs of Dacrymycetales are usually
linked with the genus Dacrymyces and have pulvinate fruit
bodies and arthric conidia as represented by D. stillatus. An
unusual coelomycetous anamorph of Dacrymycetales having
holoblastic, 2–4-armed stauroconidia was described by Kirschner
& Yang (2005) as Dacryoscyphus chrysochilus. Our fungus
resembles the anamorphic species of Kirschner & Yang, but
is different from D. chrysochilus in having dendroid conidia
composed of branches without accurate tips. In molecular
phylogenetic analyses, Dacrymyces pinacearum was clearly
separate from Dacryoscyphus chrysochilus and formed a clade
with Dacrymyces san-augustinii and D. novae-zelandiae (Fig.
16); therefore, we consider that this fungus is a new anamorphic
species of Dacrymyces.
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Жаль, что фотокаталог с признаками всё ещё не полон. Ни по цвету, ни по форме плодового тела, я этого вида не нашёл. :(
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