Chalcedon Checkerspot
( Euphydryas chalcedona )


2009-0606-43000001-LEP00333-Euphydryas_chalcedona[1332h51s,F,A,plant-flower]{EXD}-G.jpg

PHOTO COMMENT

IDENTIFICATION
Identification:Euphydryas chalcedona
(E. Doubleday, 1847)
Common Name:Chalcedon Checkerspot
Life Stage:(A) adult

PHYLOGENY

Phylum:Arthropoda
Class:Insecta
Superorder:Holometabola
Order:Lepidoptera
Family:Nymphalidae
Subfamily:Nymphalinae
Tribe:Melitaeini
Genus:Euphydryas
Taxon Code:LEP00333
ITIS TSN#:778054

LOCATION DETAILS
Location
Horsethief Canyon, Horsethief Canyon, Unincorporated Santa Clara Co
County:Santa Clara County
ECI Site#:CA43000001

RECOGNITION
Populations in the Coast Range have mostly black larvae with orange markings and little if any white.
Wingspan
3.2 - 5.7 cm
Similar Taxa
Similar to E. anicia, but generally larger, mostly found at lower elevation, and more black and white in appearance (with orange above reduced in comparison with that species). Where they occur together, this species tends to start flying earlier in the season. More orange populations occur in some of the higher mountains that look very like E. anicia, and are grouped under a separate heading.

BIOLOGY
Habitat
Sagebrush flats, chaparral, desert hills, high prairie, open forest, alpine tundra.
Flight Period
One flight; April-June in California and Oregon
Range
Primarily relatively near the Pacific Coast, west of desert areas, in areas of broken terrain, from northern British Columbia to northern Baja California Norte. Inland in mountains of eastern Oregon and Washington, across northern Idaho and just into extreme western Montana. Also inland in desert mountains across the Mojave and Sonoran Deserts of southern California and Nevada into southern Arizona and perhaps northwestern Sonora.
Distribution
Primarily relatively near the Pacific Coast, west of desert areas, in areas of broken terrain, from northern British Columbia to northern Baja California Norte. Inland in mountains of eastern Oregon and Washington, across northern Idaho and just into extreme western Montana. Also inland in desert mountains across the Mojave and Sonoran Deserts of southern California and Nevada into southern Arizona and perhaps northwestern Sonora.

HABITAT
Sagebrush flats, chaparral, desert hills, high prairie, open forest, alpine tundra.

CREDITS
Photographer
Eddie Dunbar

REFERENCES
  • Species Euphydryas chalcedona - Chalcedon Checkerspot. (bugguide.net/node/view/25005). Accessed July 16, 2016. [ IMAGES ]
  • Integrated Taxonomic Information System TSN#778054
  • Euphydryas chalcedona. (butterfly.ucdavis.edu/butterfly/Euphydryas/chalcedona). Accessed July 16, 2016.


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