1851
Graptolithus falx — Suess, pp. 119, fig. 9:10a-b
1945
Spirograptus falx (Suess, 1851) — Přibyl, pp. 216, fig. 5:1-6
1946
Spirograptus falx — Přibyl, pp. 32, fig. 5:1-6
1952
Spirograptus falx — Münch, pp. 117, fig. 37b:4a-b
1967
Oktavites falx — Obut & Sobolevskaya, pp. 119, fig. 16:9-10
1976
Oktavites falx (Suess, 1851) — Sennikov, pp. 119-201, fig. 16:1-2
1982
non Monograptus falx (Suess, 1851) — Lenz , pp. 80, fig. 7N,P,Q; 24G-I
1988
Oktavites falx (Suess, 1851) — Obut et al., pp. 91, fig. X 1-4
1990
Oktavites falx (Suess) — Ge et al., pp. 152, fig. 64:3,6,9
1993
Oktavites? falx (Suess, 1851) — Loydell & Cave, fig. 8k-n
1998
Oktavites falx (Suess, 1851) — Štorch, pp. 124, fig. text fig 3, 11-12
1998
Oktavites falx (Suess) — Loydell et al., pp. 774, fig. 5h
2003
Oktavites falx (Suess) — Loydell et al., pp. 212, fig. 7b
2006
Oktavites falx (Suess, 1851) — Loydell & Nestor, pp. 600, fig. 8:2,4-10, 9
2015
Oktavites falx (Suess) — Männik et al., pp. 231
2021
Oktavites falx (Suess, 1851) — Hopfensperger et al., pp. 288, fig. Figures 2J, 4G