Selected synonymic references
Cyttarocylis cassis (Haeckel)/plagiostoma Daday group
Cyttarocylis cassis, forma typica (Haeckel) Alder
Dictyocysta cassis: Haeckel, 1873
Cyttarocylis cassis: Fol, 1881, 1884; Brandt, 1906; Kofoid and Campbell, 1929; Balech, 1959; Souto, 1979
Cyttarocylis cassis var. a: Brandt, 1906
Cyttarocylis cassis var. b conica: Brandt, 1906
Cyttarocylis cassis var. c magna: Brandt, 1906; Jörgensen, 1924
Cyttarocylis cassis var. d: Brandt, 1906
Cyttarocylis conica: Kofoid and Campbell, 1929
Cyttarocylis magna: Kofoid and Campbell, 1929; Balech, 1959
Cyttarocylis cassis, forma plagiostoma (Daday) Alder
Stethocephalus eucecryphalus: Haeckel, 1887
Cyttarocylis cassis var. plagiostoma: Daday, 1887b
Cyttarocylis cassis var. e: Brandt, 1906
Cyttarocylis plagiostoma: Brandt, 1906; Kofoid and Campbell, 1929
Cyttarocylis plagiostoma var. c: Brandt, 1906
Cyttarocylis plagiostoma var. a: Brandt, 1906
Cyttarocylis plagiostoma var. b: Brandt, 1906
Cyttarocylis eucecryphalus: Kofoid, 1912; Kofoid and Campbell, 1929, 1939; Balech, 1959; Souto, 1979
Cyttarocylis longa: Kofoid and Campbell, 1929
Cyttarocylis brandti: Kofoid and Campbell, 1929, 1939
Cyttarocylis mucronata: Kofoid and campbell, 1939