Lygaeus (Megalonotus) sabulicola Thomson, 1870a: 190 (downgraded to subspecies by Stichel, 1959b: 255; upgraded by Southwood, 1963: 124). ST(S): Sweden, Skåne, Sandhamnaren; lost?
Rhyparochromus sabulicola var. incertus Rey, 1888a: 101. STS: France; MHNL?
Rhyparochromus chiragra var. californicus Van Duzee, 1928b: 47 (syn. Ashlock & J.A. Slater in Henry & Froeschner, 1988: 224). HT: USA, California, Contra Costa County, Albany; CASC.