Zhang et al. 2022 used genomic sequencing to determine that North American Lycaena hypophlaeas is a species distinct from Eurasian L. phlaeas. The several North American subspecies are transferred to hypophlaeas.

Zhang et al. 2022: https://www.biodiversitylibrary.org/page/62027644
Pelham catalog: http://butterfliesofamerica.com/US-Can-Cat.htm
MPG: http://mothphotographersgroup.msstate.edu/species.php?hodges=4251