Grammia nevadensis gibsoni ( McDunnough, 1937 )

Ferguson, Douglas C. & Schmidt, Christian, 2007, Taxonomic review of the Grammia nevadensis species group (Lepidoptera: Arctiidae) with descriptions of`two new species, Zootaxa 1405, pp. 39-49 : 42

Grammia nevadensis gibsoni ( McDunnough, 1937) revised status

( Fig. 1 d)

Grammia gibsoni was described from the Canadian prairies (type locality: Calgary, Alberta; Types in CNC). It is a relatively brightly­coloured representative of nevadensis , that occurs in the northern Great Plains from Alberta to Manitoba, south through Montana. Gibsoni is intermediate between superba and nevadensis in many respects, in that it has wider forewing bands and less saturated hindwing colours than superba. Gibsoni phenotypes also occur south to at least south­central Wyoming. To the west, it is largely replaced by superba north of the Great Basin, and nevadensis to the southwest.

Figures

FIGURE 1. Adult males of the Grammia nevadensis species group, a) G. n. nevadensis (Winnemuca, Humboldt Co., NV); b) G. n. superba (Victoria, Vancouver Is., BC); c) G. n. geneura (Estes Park, Larimer Co., CO); d) G. n. gibsoni (Burstall dunes, SK); e) G. behrii (Eight Dollar Mtn., Josephine Co., OR); f) G. i n c o r r u p t a (Comanche Natl. Grassland, Baca Co., CO); g) G. williamsii (Jenner, AB); h) G. eureka (HOLOTYPE, Eureka, Juab Co., UT); i) G. bowmani (PARATYPE, Black Ridge, Mesa Co., CO).