Dalla Torre, 1893: 52; Bolton, 1995b: 363.
Taylor, 1964: 135 (review of genus); Dlussky & Putyatina, 2014: 245 (review of genus and fossil Miocene species).
Fossil: 0 valid species (13 obsolete combinations, 3 unavailable misspellings), 0 valid subspecies (2 obsolete combinations)