it contains eight species and one subspecies, found in
Mexico and the
United States: •
Idionella anomala (
Gertsch &
Ivie, 1936) – USA •
Idionella deserta (Gertsch & Ivie, 1936) – USA •
Idionella formosa (
Banks, 1892) (
type) – USA •
Idionella f. pista (
Chamberlin, 1949) – USA •
Idionella nesiotes (Crosby, 1924) – USA, Mexico •
Idionella rugosa (Crosby, 1905) – USA •
Idionella sclerata (Ivie & Barrows, 1935) – USA, Mexico •
Idionella titivillitium (Crosby & Bishop, 1925) – USA •
Idionella tugana (Chamberlin, 1949) – USA ==References==