Graptolithina

Paratetragraptus approximatus (Nicholson, 1873)

Synonymy list
1873     Tetragraptus approximatus — Nicholson, pp. 136, fig. 2
1904     Tetragraptus approximatus — Törnquist, pp. 6, fig. 1:11-12
1920     Tetragraptus approximatus — Keble, pp. 195, fig. 33:1a-c
2017     Paratetragraptus approximatus (Nicholson, 1873) — VandenBerg, pp. 43, fig. F. 2-3
Selection of related publications
Egenhoff, S., Maletz, J. 2007. Graptolites as indicators of maximum flooding surfaces in monotonous deep-water self successions. Palaios 22, 4, 373-383. DOI:10.2110/palo.2005.p05-096r
Kaljo, D. 1974. On graptolite zones of Tremadoc and Arenig of Pribaltic and Moscow syneclises. Graptolites of the USSR, pp. 31-36.
References based on distribution