Platycerus depressus LeConte, 1850: 224. (orig. comb.
P. piceus Kirby, 1837: 141 (invalid name, misidentification)
P. helopioides Dejean 1836: 194 (nomen nudum)

...P. depressus LeConte, male. .Photo by M.J. Paulsen	.....Approximate distribution of P. depressus.

Distribution: Boreal North America, Northern United States and southern Canada to the Rocky Mountains south to Utah, New Mexico and Arizona.

Benesh, B. 1946. A systematic revision of the Holarctic genus Platycerus Geoffroy (Coleoptera: Lucanidae). Transactions of the American Entomological Society 63: 139-203.

Van Dyke, E.C. 1928. Notes and descriptions of new species of Lucanidae and Cerambycidae (Coleoptera) from western North America. Pan-Pacific Entomologist 4: 105-113.

Remarks:

The correct name for this species is Platycerus depressus LeConte. Benesh (1946) erroneously used the name P. piceus Kirby, but that name is not available (it is invalid because it is based on a misidentification of Ceruchus piceus (Weber)).