The following is the original description of the El Segundo blue butterfly, a small blue lycaenid butterfly. Aurora faint along semimacule band or lacking. Same as above. Shields originally described this subspecies in the genus Shijimiaeoides. The common name is sometimes referred to simply as El Segundo blue.
Listing is rangewide.
Critical Habitat has not been designated. The El Segundo blue butterfly is not protected under California law. Code, Ch. 3, Sec. 15380. The butterfly has an exclusive host relationship with Eriogonum parvifolium, the inflorescences of which are used both as a larval food source and adult nectar sources. Furthermore, plants with the greatest biomass supporting the highest number of larvae and adult butterflies are found in swales and on wind protected dune crests, which indicates that the still undetermined slope and aspect requirements are among key environmental parameters for the butterfly.