This genus includes about 50 species: •
Illaenus alveatus Raymond 1925 •
Illaenus auriculatus Ross Jr. & Barnes 1967 •
Illaenus bayfieldi Billings 1859 •
Illaenus bucculentus Whittington 1963 •
Illaenus consimilis Billings 1865 •
Illaenus consobrinus Billings 1865 •
Illaenus crassicauda Wahlenberg 1826 •
Illaenus fraternus Billings 1865 •
Illaenus gelasinus Whittington 1965 •
Illaenus lacertus Whittington 1954 •
Illaenus marginalis Raymond 1925 •
Illaenus oscitatus Fortey 1980 •
Illaenus slancyensis Krylov 2016 •
Illaenus spiculatus Whittington 1963 •
Illaenus tauricornis Kutorga 1848 •
Illaenus tumidifrons Billings 1865 •
Illaenus utahensis Hintze 1952 •
Illaenus welchi Loch & Ethington 2017 ==See also==