Cydnus punctulatus A. Costa, 1847b: 30. LT (Carapezza et al., 1995: 283): male, Italy, Naples; ZIUN.
Cydnus laevicollis A. Costa, 1847b: 31 (syn. Signoret, 1881e: 649). HT: male, Italy, Naples; ZIUN.
Cydnus bifoveolatus Herrich-Schaeffer, 1851: 344 (syn. Mulsant & Rey, 1866b: 36). ST(S): Italy; lost.
Cydnus helferi Fieber, 1861a: 364 (syn. Mulsant & Rey, 1866b: 36). STS: Italy, Sicily.
Cydnus aciculatus Fieber, 1864b: 233 (syn. Mulsant & Rey, 1866b: 36). STS: Germany, Crefeld (in error).
Cydnus episternalis Mulsant & Rey, 1866b: 38 (syn. Signoret, 1881e: 649). HT: male, Spain.
Aethus platysomoides Walker, 1867b: 163 (syn. J.A. Lis, 1999a: 204). HT: male, locality not given; BMNH.
Aethus laevis Douglas & Scott, 1868a: 238 (syn. Saunders, 1875a: 233). STS: Great Britain, Whitsand Bay; BMNH.