Xylobolus brasiliensis is characterised by resupinate to effused reflexed basidiomata often stratified in several layers, 1–2 mm thick; hymenial surface greyish brown, glabrous, smooth to slightly pilose; hyphal system monomitic to pseudodimitic due to the acanthohyphidia, vertically arranged, hyphae clamped. The acanthohyphidia are numerous in trama and hymenium, cylindrical with obtuse apex, 20–74 × 4–8 μm. Basidiospores are yellowish to brownish, subglobose to ellipsoid, 5–6(–6.5) × (3–)3.5–5 μm, slightly thick-walled, smooth in KOH 3 %, minutely ornamented in Melzer, with a lateral prominent apiculus, distinctly amyloid. Morphologically, Xylobolus brasiliensis is quite similar to X. frustulatus, but the latter has shorter acanthohyphidia (25-30 × 4-5 µm) and basidiospores (4.5-5(-5.5) × 3-3.2(-3.5) µm), rare pseudocystidia and elongated basidia (25-30 × 4-5 µm) (Crous et al. 2019).
Why suggested for a Global Red List Assessment?
The species is known only to Brazil.
Population and Trends
There are about 7 records of this species (Crous et al. 2019), only to Brazil.
Habitat and Ecology
In Brazil, the species is know only to the Atlantic Rain Forest.
Subtropical/Tropical Moist Lowland Forest
In Brazil, this species is recorded in the Atlantic Forest, a hotspot.
Other areas should be studied in order to assess the distribution of this species. Herbaria revision is also suggested, once Brazilian material identified as other Xylobolus species may represent X. brasiliensis.
TaxonomyPopulation size, distribution & trendsPopulation trends