Cymatograptus protobalticus (Monsen, 1937)

1933     Didymograptus patulus (J. Hall) — Elles, pp. 100, fig. 9

1937     Didymograptus protobalticus n. sp. — Monsen, pp. 138-140, fig. 3:2-3,40; 9:5

1979     Didymograptus protobalticus Monsen — Jackson , pp. 28, fig. 4a-c

1991     Expansograptus protobalticus (Monsen) — Palmer et Rickards, fig. 96

1992     Cymatograptus protobalticus (Monsen) — Maletz, pp. 142-143, fig. 72:3; 74:1-12; 54:1

1996     Didymograptus (s. l.) protobalticus Monsen, 1937 — Maletz, pp. 111-112, fig. 2A-E; 3C; F-H

2004     Cymatograptus protobalticus — Bergström et al., pp. 268