Plectronotus Morse, 1900: 6 (original description of the genus, P.scaber designated as the type species). — Hancock 1902: 161 (reproduction of the original description); 1907a: 69 (reproduction of the original description). — Kirby 1910: 59 (catalogued). — Bruner 1910: 139 (the genus (then only containing P. scaber) is likely to occur in South America but has not yet been found). — Grant 1955a: 58 (new diagnosis of the genus, description of a new species (P. excavatus), key to the species, distribution map covering little more than type localities). — Otte 1997: 4 (catalogued). — Storozhenko 2019: 105 (catalogued). — Silva et al. 2021: 20 (catalogued).
TYPE SPECIES. — Plectronotus scaber Morse, 1900, by original monotypy.
COMPOSITION AND DISTRIBUTION. — Two species, both of which have only been known to occur in Central America: P. excavatus (Panama) and P. scaber (Costa Rica).