Graptolithina

Orthograptus acutus (Lapworth, 1890)

Synonymy list
1890     Diplograptus (Orthograptus) calcaratus var. acutus — Lapworth
1907     Diplograptus (Orthograptus) calcaratus var. acutus — Elles et Wood, pp. 242, fig. 30:3a-c
1947     Diplograptus (Orthograptus) calcaratus var. acutus — Ruedemann, pp. 399, fig. 68:14-19
1960     Orthograptus calcaratus var. acutus — Berry, pp. 89, fig. 16:3-4
1963     Orthograptus calcaratus var. acutus — Ross et Berry, pp. 145, fig. 11:18; 12:1, 17
1964     Orthograptus acutus — Obut et Sobolevskaya, pp. 65-66, fig. 13:7
1976     Orthograptus acutus (Lapworth, 1890) — Tzaj, pp. 52-53, fig. 7:6
Selection of related publications
Tzaj, D. T. 1976. Graptolity srednego ordovika Kazahstana.
References based on distribution