1905
Ptilodictya triangularis n. sp. — Hennig, pp. 20, fig. 1:34; 2:3; text fig. 15-18
1975
Ptilodictya triangularis Hennig, 1905 — Kopajevich, pp. 69
1979
Ptilodictya triangularis Hennig — Brood, pp. 173
1993
Ptilodictya triangularis Hennig, 1905 — Gorjunova & Lavretjeva, pp. 65