Distribution Guatemala, Huehuetenango, Chiantla, Majadas; Huehuetenango, San Mateo Ixtatán, 2 km north of Bulej; Chimaltenango, Tecpan, Molino Helvetia. Elevation range 1,990-3,000 m. Geographic range crosses the Polochic and Motagua fracture zones and the high elevation distribution of Pallas reynaudi may be the result of tectonic uplift in this region.
Systematics Known from single species named for Mr. Gérard Reynaud (Paris). Phylogenetic relationship to other Hepialidae unresolved. Not a member of the cibyrine clade. Possibly close to the Phassus group, but male genitalia do not conform, are distinct from any other American Hepialidae, particularly in the shape of the valve with a heavily sclerotized base with two pointed projections. Wing pattern distinct from all other known Hepialidae.
Biology Unknown. Probably a stem borer.
Reference Mielke, C.G.C. & Grehan, J.R. 2016. Description of a new species of Phassus Walker, 1856 from Costa Rica, Pallas, gen. n., with a new species from Guatemala, and taxonomic notes on Sthenopis Packard,  (Lepidoptera, Hepialdiae). The European Entomologist 7, 113-134.
Pallas reynaudi Mielke & Grehan, 2016 Guatemala Flight: April-May Holotype: Universidade del Valle de Guatemala, Guatemala