Bolton, 1995b: 167; Fisher & Bolton, 2016: 258 (checklist).
Bolton, 1981b: 256 (diagnosis, all species revision, key); Bolton, 1995a: 1049 (census); Taylor, 2009: 25 (notes); Fisher & Bolton, 2016: 256 (diagnosis).
Extant: 4 valid species (1 unavailable misspelling)