A very rare tooth fungus that forms scattered tiny white spines, up to 2 mm long, directly on well-rotted wood, with almost no crust between them. It is the type species of Dentipratulum and was described by Domanski from the Bialowieza Primeval Forest in Poland. Its small, round, warty and strongly amyloid spores fit its placement in Auriscalpiaceae (Russulales).
Not edible; minute spines on rotten wood with no food use. No toxicity documented.
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On well-decayed wood of conifers and hardwoods, in medium to late stages of decay. The holotype was on a fallen Norway spruce (Picea abies) trunk.
Distribution
Europe: known from four localities in Poland, France and Switzerland (Karasinski & Piatek 2017). Material from the Kuril Islands and some French collections once filed here is now D. crystallinum, and Indian material is D. khuranae.
Characteristics
Fruit body: separate spines in lines or irregular groups on decayed wood; white and soft when fresh, cream-ochraceous and brittle when dry. Spines: 0.25-2 mm long, 75-200 µm wide, pointed, unbranched, often with a short stalk-like base, sterile at the tip. Subiculum: thin, rudimentary and patchy (about 10-25 µm). Hyphae: monomitic, with clamps; generative hyphae 2-4.5(-6) µm wide; sulfopositive gloeoplerous hyphae 2.5-4.5 µm wide. Gloeocystidia: up to about 200 x 4.5-10 µm; leptocystidia absent. Basidia: 14-20(-25) x 4-4.8 µm, usually 4-spored, with a basal clamp. Spores: (3.8-)4-5.6(-6) x (3.4-)3.8-5(-5.3) µm, subglobose to globose, with small crowded warts, strongly amyloid.
