1954
Acontiodus rectus n. sp. — Lindström, pp. 549, fig. 2:7-11, text fig. 2k-m, 3b
1954
Scandodus rectus n. sp. — Lindström, pp. 593, fig. 4:21-25
1971
Protopanderodus rectus (Lindström, 1955) — Lindström, pp. 50
1978
Protopanderodus rectus (Lindström, 1955) — Löfgren, pp. 90, fig. Pl. 3:1-7, Pl.3: 36A-B ; Tex t-fig. 31A-C .
1993
Protopanderodus rectus (Lindström, 1955) — Löfgren, fig. 5A-D
1994
Protopanderodus rectus (Lindström, 1955) — Löfgren, fig. 7:7-10
2001
Protopanderodus rectus (Lindström, 1955) — Rasmussen, pp. 124, fig. 16:1-4
2003
Protopanderodus rectus — Tolmacheva et al., pp. 33
2018
Protopanderodus rectus — Wu et al.