Basionym Name:Entyloma hydrophilum Sacc. & Paol., in Saccardo, Bull. Soc. R. Bot. Belg. 28(no. 1): 85 (1889)
Homotypic synonyms:Entyloma helosciadii var. hydrophilum (Sacc. & Paol.) Cif., in Batista & Ciferri, Quad. Lab. crittogam., Pavia 31: 125 (1963)