Graptolithina
Species

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. pp. 1-76. Nauka.