Atelecrinus helgae A.H. Clark, 1913b: 4–5; 1931: 52; 1941: 17, 19, 36.— Gislén 1924: 43, 45, 47, 50, 53, 81, 83, 93.— Mortensen 1927: 22–23, fig. 10.— A.H. Clark & A.M. Clark 1967: 819 (key), 831–832, 851.— Messing 2013: 12–15, fig. 6a–e.
Atelecrinus balanoides: H.L. Clark 1941: 13.—A.M. Clark 1970: 49–51 (part).
Atelecrinus balanoides form helgae: Messing & Dearborn 1990: 11, 23, 28, fig. 7b.—Massing 2003a: 280.
Type locality. 53º58′N 12º24′W, Northwest of Galway Bay, western Ireland, United Kingdom.
Type material. USNM 35779 (Holotype).
Geographic and bathymetric range. Northeastern Atlantic (north and west of the British Isles) and Western Atlantic (Gulf of Mexico, southern Blake Plateau, Strait of Florida, Bahamas, eastern Caribbean Sea, Trinidad & Tobago, Venezuela, and Brazil), at depths from 640 to 2,825 m (A.H. Clark & A.M. Clark 1967; Messing 2013; IZ Batabase).
Brazilian localities. Ceará and Alagoas (Messing 2013).