Gyrinus (Neogyrinus) chalybaeus Perty, 1830

Gyrinus chalybaeus Perty, 1830: 15, f 15 (orig. descr.); Aubé 1838: 706 (descr.); Gemminger & Harold 1868: 468 (catalog); Régimbart 1883b: 188, pl 6, f 96 (descr.); 1884: 475 (record); 1892: 684 (descr.); 1903a: 8 (record); Luederwaldt 1915: 81 (record); Zimmermann 1917: 164 (collection list); Ochs 1948: 565 (checklist); 1956: 3 (descr.); 1957: 213 (record); 1958b: 479 (record); 1960b: 308 (record); 1966: 443 (record); 1969: 378 (ethology, ecology); Blackwelder 1944: 81 (checklist); Balfour-Browne 1945: 110 (nomenclature); Benetti & Régil 2004: 6 (ecology)

Gyrinus marginalis Laporte, 1834: 108 (orig. descr.)[synonymy by Aubé, 1838: 706]

Gyrinus derasus Sharp, 1877: 118 (orig. descr.) [synonymy by Ochs, 1935a: 131]

Gyrinus chalybaeus var. derasus Sharp: Régimbart 1883b: 189 (n. comb.); 1884: 475 (record) [synonymy by Ochs, 1935a: 131]

Gyrinus (Neogyrinus) chalybaeus Perty: Hatch 1925: 458 (n. comb.); Ochs 1935a: 131 (descr.); 1963c: 459 (record); Benetti et al. 2003b: 38, 42 (record, distr.); Benetti & Garrido 2004: 159 (record, distr.); Gustafson & Miller 2013: 85 (nomenclature)

DISTRIBUTION: Argentina, Brazil (BA, ES, MG, PR, RJ, RS, SC, SP), Paraguay, Uruguay.