Additionally the possibility that several palaeorehniids may be sister species was left open, and further specimens are needed for resolution of the relationships or synonymies between the genera.

[2] An additional member of the family Palaeorehniidae, Ypopteron nicola was described from the Quilchena site and one promastacid grasshopper, Promastax archaicus was described from the Horsefly shales.

Due to the sparse volume of specimens known, Archibald, Gu, and Mathewes noted their suspicion that some of the palaeorehniid genera might be synonyms, but they could not make any specific combinations until more fossils were found for study.

The 3A terminates at the wing margin more apically than where the Cubitus-anterior veins CuA and CuPaα merge, a feature not visible in Y. nicola but likely also present there.

As with Palaeorehnia, the Radial, R, and Media, M, veins both branch near the same point in the wing, contrary to other Zeuneroptera, the only other genus with that area preserved and identifiable.

Katydids and their relatives in Ensifera use modified areas of the fore-wings, called stridulatory files, to produce broadband and pure sound which is used for mate location.

[6] The pollen flora has notable elements of birch and golden larch, and distinct trace amounts of fir, spruce, cypress, and palm.

However, further study has shown the lake system was surrounded by a warm temperate ecosystem that likely had a mesic upper microthermal to lower mesothermal climate, in which winter temperatures rarely dropped low enough for snow, and which were seasonably equitable.