Sydowiellina rionegrensis Bat., Holanda & Peres

URM 21423. Place of collection: Brazil; Amazonas; Manaus, Enseada grande, Rio Negro. Date of collection: 7 March 1961. Associated organisms: Leguminosae gen.indet.; Micropeltis sp.; Parapeltella soroceae; Stigmopeltopsis amazonensis. Collector: Peres, G.E.P..