Rhizochaete sulphurosa is characterised by the resupinate basidiomata, membranous, easily detachable from the substrate; hymenophore smooth, lemon yellow, becoming light purple in 3% KOH; hyphal system monomitic, with few clamp, hyphae of rhizomorphic margin hyaline, smooth, 3.0–4.5 µm, thick-walled, without clamp; cystidia present, cylindrical to fusiform, thin-walled, 30–45 × 4–5.5 µm, usually first finely encrusted,  becoming obscured by crystal masses; basidia narrowly clavate, 22–25 × 4.5–5.5 µm, 4-sterigmate; basidiospores ellipsoid to cylindrical, 4.5–5.5 × 2–3 µm, thin-walled, hyaline, smooth, with guttula (Chikowski et al. 2016).

The species in known in 2 countries and all but one record are in Brazil.

There are about 30 records of this species in GBIF, most of them in Brazil.

In Brazil, the species is found in Amazon Forest, Atlantic Forest and Cerrado

In Brazil, this species is mostly distributed in the Northeast of Atlantic Forest, collected only once in Cerrado and Amazon. Amazon has currently the highest rates of deforestation in the last decades and the Atlantic Forest and Cerrado are hotspots.

Most records in Brazil are in protected areas,.

The species, even occurring in several biomes, has a fragmented distribution. Studies about its population distribution are needed.

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