However, in 1962 the British mycologist Richard Dennis noted that Kirchstein's description of Trichangium vinosum bore a close resemblance to another bark-living fungus, Unguiculella robergei, and suggested that the two might be the same species. Unguiculella robergei is itself a very rare fungus, otherwise only known from a handful of records in France and Scotland, seemingly all in the month of April (see MycoDB). It has been recorded from bark and dead twigs of mistletoe and roses, producing dark red, disk- or cup-shaped fruiting bodies less than a millimetre in diameter. These fruiting bodies are covered with small glassy hairs; the hooked shape of these hairs was presumably the inspiration for the genus name meaning a small claw or nail. It is possible, of course, that this fungus is more common than realised: with something this small, you need to be looking for it.
REFERENCE
Dennis, R. W. G. 1962. New or interesting British Helotiales. Kew Bulletin 16 (2): 317–327.
Lumbsch, H. T., & S. M. Huhndorf. 2010. Myconet volume 14. Part One. Outline of Ascomycota—2009. Part Two. Notes on ascomycete systematics. Nos 4751–5113. Fieldiana: Life and Earth Sciences, N.S. 1: 1–64.
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