Gryon investe (Kieffer)

Plastogryon investis Kieffer, 1908: 143 (original description. Synonymized by Masner (1961)); Masner, 1961: 160 (junior synonym of Gryon misellus Haliday).

Plastogryon Investis Kieffer: Kieffer, 1913: 249 (description).

Plastogryon (Heterogryon) investis Kieffer: Kieffer, 1926: 446, 449 (description, subgeneric assignment, keyed).

Gryon investis (Kieffer): Kozlov, 1978: 620 (description); Kozlov & Kononova, 1989: 79 (keyed); Kozlov & Kononova, 1990: 267, 277 (description, keyed); Kononova, 1995: 81 (keyed); Kononova & Petrov, 2002: 55 (keyed).

Gryon investe (Kieffer): Kononova & Kozlov, 2008: 326, 377 (treated as valid species, description, keyed); Timokhov, 2019b: 47 (catalog of species of Russia).

Comments.

The treatment of Plastogryon investis as a junior synonym of Gryon misellum by Masner (1961) indicates that, at the least, they are congeneric.