Klauber (1972) suggested this species is closely related to C. scutulatus.
Laurence M(onroe). Klauber (1883, San Diego, California - 1968), an American herpetologist
This subspecies was established by J.M. Savage and F.S. Cliff, based on information that had previously been published by Stanford, Klauber and Hensley.
Klauber (1956) gives an average venom yield of 56 mg for this species.
The San Diego mountain kingsnake typically emerges from overwintering sites in March and may remain near-surface active through November, but it is particularly conspicuous near the surface from roughly mid-March to mid-May (Klauber 1931, McGurty 1988, Hubbs 2004), during which time it is active during the warmer daylight hours (pers. observ.).
Coleonyx variegatus slevini (Klauber, 1945), a subspecies in the species Coleonyx variegatus, the western banded gecko, a reptile species