1911
Didymograptus lentus n. sp. — Törnquist, pp. 430-432, fig. 5:10-15
1932
Didymograptus callotheca Bulman — Bulman, pp. 16-19, fig. 2-5
1936
Didymograptus callotheca Bulman — Bulman, pp. 23, fig. 2:1-15
1937
Didymograptus lentus Törnquist — Ekström, pp. 26, fig. 2:7-8
1950
Didymograptus callotheca Bulman — Bulman, pp. 390, fig. 1A-C
1950
Didymograptus callotheca Bulman — Bulman, pp. 4
1954
Holmograptus callotheca Bulman — Kozlowski, pp. 432-434, fig. 6
1955
Didymograptus callotheca Bulman — Bulman, pp. V80, fig. 57, 1d-e
1957
Tylograptus geniculiformis n. sp. — Mu, pp. 429-430, fig. 5:1-2; 8:1
1960
Holmograptus lentus Törnquist — Jaanusson, pp. 341-342, fig. 5:11
1965
Holmograptus lentus (Törnquist, 1911) — Skevington, pp. 41-44, fig. 47-50
1995
Holmograptus lentus (Törnquist, 1911) — Maletz, pp. 256
1998
Holmograptus lentus (Törnquist, 1911) — Maletz, pp. 360, fig. 7H