Plinthisus (Plinthisomus) ptilioides Puton, 1874d: 452. LT (Scudder, 1967b: 156): female, Syria; MNHN.
Plinthisus subcarinatus Wagner, 1949n: 11 (syn. Péricart, 1997b; 484). HT: male (brach.), Turkey, Lyciae Taurus; NHMW.
Plinthisus franzi Wagner, 1961v: 21 (syn. Wagner, 1963t: 116, with subcarinatus). HT: male (macr.), Chad, Deressia nr Lai; ZMUH.