Selected synonymic references
Tintinnus sp.: Claparède and Lachmann, 1858-1859
Tintinnus claparèdii: Entz, Sr., 1885
Undella Claparèdei: Daday, 1887b; Balech, 1975; Souto, 1979
Undella subacuta: Cleve, 1901; Balech, 1975; Souto, 1979.
Undella claparedei var. c: Brandt, 1906-1907
Undella claparedei var. d: Brandt, 1906-1907
Undella claparedei var. e globosa: Brandt, 1906-1907
Undella claparedei var. f: Brandt, 1906-1907
Undella claparedei var. g: Brandt, 1906-1907
Undella subcaudata: Jörgensen, 1924
Undella subacuta var. subcaudata: Jörgensen, 1924
Undella subcaudata subcaudata: Jörgensen, 1924; Balech, 1975; Souto, 1979
Proplectella claparedei: Kofoid and Campbell, 1929; Balech, 1959
Proplectella perpusilla: Kofoid and Campbell, 1929
Proplectella praelonga: Kofoid and Campbell, 1929
Proplectella tenuis: Kofoid and Campbell, 1929
Proplectella biangulata: Kofoid and Campbell, 1929
Proplectella parva: Kofoid and Campbell, 1929
Proplectella fastigata: Kofoid and Campbell, 1929
Proplectella globosa: Kofoid and Campbell, 1929
Proplectella ovata: Kofoid and Campbell, 1929
Proplectellaangustior: Kofoid and Campbell, 1929
Proplectella subcaudata: Kofoid and Campbell, 1929
Proplectella subacuta: Kofoid and Campbell, 1929
Proplectella globosa: Kofoid and Campbell, 1939
Undella globosa: Balech, 1975; Souto, 1979
? Undella perpusilla: Balech, 1975; Souto, 1979