1861
Retiolites gracilis n. sp. — Roemer, pp. 31, fig. 5:1
1963
Orthograptus gracilis (Roemer, 1861) — Skoglund, pp. 46-48, fig. 4:6; 5:5,7
2002
Rectograptus gracilis (Roemer, 1861) — Palsson, pp. 19, fig. 7D-F, I
2017
Rectograptus gracilis (Roemer, 1861) — Maletz & Schöning, fig. 1i