Didymograptus gracilis Törnquist, 1891

1891     Didymograptus gracilis — Törnquist, pp. 17, fig. 1:9-12

1895     Didymograptus gracilis — Törnquist, fig. 1:7-8

1895     Didymograptus gracilis — Elles, pp. 506

1901     Didymograptus gracilis — Elles et Wood, pp. 24, fig. 2:2

1902     Didymograptus gracilis — Ruedemann, pp. 589, fig. 17

1915     Didymograptus gracilis — Bassler, pp. 432

1937     Didymograptus gracilis — Monsen, pp. 123, fig. 2:70