Euphydryas chalcedona klotsi
dos Passos, 1938
Euphydryas chalcedona klotsi is a of the variable checkerspot described by dos Passos in 1938. It belongs to the and is currently treated as a synonym of Occidryas chalcedona in some taxonomic databases, reflecting ongoing taxonomic revision in the Euphydryas complex. The broader Euphydryas chalcedona is known to exhibit significant declines in western North America, with climate change identified as a major contributing factor.

Pronunciation
How to pronounce Euphydryas chalcedona klotsi: /juːˈfaɪdriəs kælˈsiːdoʊnə ˈklɒtsi/
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