Summary:
The minute disc-like to cushion-shaped fruitbodies grow on Hypogymnia lichen. They are whitish or pale grayish brown when young, becoming almost black when old. Consistency is waxy-gelatinous. Tremella papuana is identified by microscopic characters. The description derived from Diederich(1) except where noted.
The species is found in BC (Diederich(2)), and Papua New Guinea (Diederich(1)).
Fruiting body:
fruitbodies 0.02-0.05cm across, applanate [flat] to pulvinate [cushion-shaped], discoid; whitish or pale grayish brown when young, becoming almost black when old, always darker in center; shiny; consistency waxy-gelatinous
Microscopic:
spores 6-7.5 x 3.5-6 microns, elliptic, with a large apiculus; basidia 2-spored, 11-15 x 6.5-8.5 microns, when mature tremelloid, ellipsoid, with one longitudinal or slightly oblique septum, the two cells sometimes not equal in size, epibasidia 1.5-2.5 microns wide, at least 30 microns long; hymenium colorless, "containing numerous probasidia, strongly gelatinised", probasidial initials ellipsoid, proliferations occurring through the basal clamp connections; hyphidia and cystidia absent; hyphae of context 1-2 microns wide, clamp connections not observed, fertile hyphae 2.5-3.5 microns wide, thick-walled, with clamp connections; haustorial branches tremelloid, with clamp connections, mother cell 2-3 microns in diam, subspherical; anamorph unknown
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