Selected synonymic references
Tintinnus subulatus: Ehrenberg, 1883; Brandt, 1906-1907
Cyttarocylis annulifera: Ostenfeld and Schmidt, 1901
Tintinnus mediterraneus var. longa: Brandt, 1906-1907
Tintinnus patagonicus: Brandt, 1906-1907; Faría and Da Cunha, 1917
Helicostomella subulata: Jörgensen, 1924; Souto, 1970a, 1979; Barría de Cao, 1986
Helicostomella kiliensis: Kofoid and Campbell, 1929
Helicostomella fusiformis: Kofoid and Campbell, 1929
Helicostomella edentata: Kofoid and Campbell, 1929
Helicostomella longa: Kofoid and Campbell, 1929
Metacylis annulifera: Kofoid and Campbell, 1929; Balech, 1951; Souto, 1979
Helicostomella Lemairei: Balech, 1944