Nerthra Say, 1832: 37. Type species by monotypy: Naucoris stygicus Say, 1832, N America.
Mononyx Laporte, 1832: 15, 16 (syn. Champion, 1901: 350; Todd, 1955: 345). Type species by monotypy: Naucoris raptorius Fabricius, 1803, Neotropical.
Peltopterus Guérin-Méneville, 1843: 113 (syn. Todd, 1955: 345). Type species by monotypy: Naucoris rugosa Desjardins, 1837.
Mononychus Agassiz, 1847: 238. Unjustified emendation. Junior homonym of Mononychus Schueppel in Germar, 1824 (Coleoptera, Curculionidae).
Mononyxa Spinola, 1850: 49. Incorrect subsequent spelling.
Matinus Stål, 1861a: 201 (syn. Todd, 1955: 345). Type species by monotypy: Mononyx alaticollis Stål, 1854, Australia.
Phintius Stål, 1861a: 201 (syn. Montandon, 1899a: 392, with Mononyx). Type species by subsequent designation (Kirkaldy, 1906a: 149): Mononyx grandicollis Germar, 1838, tropical Africa.
Scylaecus Stål, 1861a: 201 (syn. Montandon, 1899a: 392, with Peltopterus). Type species by monotypy: Galgulus macrothorax Montrouzier, 1855.
Glossoaspis Blatchley, 1925: 50 (syn. Todd, 1955: 345). Type species by monotypy: Glossoaspis brunnea Blatchley, 1925 (= Naucoris rugosa Desjardins, 1837).