The purpose of this case, under Articles 75.5 and 81.2.3 of the Code, is to eliminate current nomenclatural confusion within the butterfly genus Callophrys Billberg, 1820. Differing identifications of the lectotype of Callophrys dumetorum Boisduval, 1852 have changed the usages of C. dumetorum, C. viridis Edwards, 1862 and C. perplexa Barnes & Benjamin, 1923. A neotype of Callophrys dumetorum is proposed to restore these names to their previous stable usages. Moreover, the recently suggested conspecificity of C. viridis and C. sheridanii Edwards, 1877 will frequently synonymise sheridanii, a widespread, common and well known species, so it is also proposed that the widely used name sheridanii be given precedence over viridis whenever the two are considered to be synonyms.
Thecla dumetorum Boisduval, 1852 (currently Callophrys dumetorum): proposed neotype; and Thecla sheridonii Edwards, 1877 (currently C. sheridanii) (Lepidoptera, lycaenidae): proposed conservation," The Bulletin of Zoological Nomenclature 67(3), 225-237, (1 September 2010). https://doi.org/10.21805/bzn.v67i3.a11