1954
Drepanodus numarcuatus n. sp. — Lindström, pp. 564-565, fig. 2:48-49
1954
Drepanodus amoenus n. sp. — Lindström, pp. 558, fig. 2:25-26, text fig. 4
1971
Paroistodus numarcuatus (Lindström, 1955) — Lindström, pp. 46, fig. text fig. 8
1974
Drepanodus numarcuatus Lindström, 1955 — Viira, pp. 66, fig. text fig. 15,65
1974
Drepanodus amoenus Lindström, 1955 — Viira, pp. 66, fig. text fig. 15,65
1974
Transitional morphotypes between Drepanodus numar cuatus Lindström and Drepanodus amoenus Lindström — Viira, fig. text fig. 15
1974
Paroistodus amoenus (Lindström) — van Wamel, pp. 78-79
1988
Paroistodus numarcuatus — Stouge & Bagnoli, pp. 127-128, fig. 8:8-11
1994
Paroistodus numarcuatus — Löfgren, fig. 6:1-3
1997
Paroistodus numarcuatus — Löfgren, fig. 4:b
1997
Paroistodus numarcuatus — Löfgren, pp. 921-922, fig. 2:o-u, 3:a-k, 4a-k
2001
Paroistodus numarcuatus (Lindström, 1955) — Rasmussen, pp. 106, fig. 12:13-17