Cyrtograptus rigidus Tullberg, 1883

1883     Cyrtograptus rigidus — Tullberg, pp. 38, fig. 4:12-14

1900     Cyrtograptus symmetricus — Elles, pp. 410, fig. 24:4A-B

1914     Cyrtograptus symmetricus Elles — Elles and Wood, pp. 509, fig. 51:5a-c

1923     Cyrtograptus rigidus Tullberg — Gortani, pp. 59, fig. 11:5-11; 13:4D, 6A

1933     Cyrtograptus rigidus Tullberg — Bouček, pp. 41, fig. 8c-d; 5:7-8

1945     C. symmetricus Elles — Waterlot, pp. 94, fig. 49:474

1952     Cyrtograptus rigidus Tullb. — Münch, pp. 36, 136, fig. 51:1a-d

1967     Cyrtograptus rigidus cautleyensis — Rickards, pp. 246, fig. 13d

1975     Cyrtograptus rigidus Tullberg — Berry et Murphy, pp. 89-90, fig. 13:3

1980     Cyrtograptus rigidus Tullberg, 1883 — Lenz, pp. 1084, fig. 2:H-I

1986     Cyrtograptus rigidus rigidus (Tullberg, 1883) — Bjerreskov, pp. 8, fig. 8D

1991     Cyrtograptus symmetricus Elles, 1900 — Tomczyk, Urbanek etTeller, pp. 320, fig. 178:2, 3a-b

1999     Cyrtograptus rigidus Tullberg, 1883 — Zalasiewicz et Williams, fig. 10m

2004     Cyrtograptus rigidus Tullberg, 1883 — Williams et Zalasiewicz, pp. 253-258, fig. 12A-Z