Jerarquía taxonómica:
Mutillidae → Sphaeropthalma (Micromutilla) difficilis (Baker, 1905)

Familia:
Mutillidae

Autor:
(Baker, 1905)

Sinónimos:
Photopsis difficilis Baker, 1905
Sphaeropthalma (Micromutilla) maricopella Schuster, 1958
Sphaeropthalma (Micromutilla) californiense Schuster, 1958
Sphaeropthalma (Micromutilla) quijotoa Schuster, 1958
Sphaeropthalma (Micromutilla) maricopella subsp. purismella Schuster, 1958
Sphaeropthalma (Micromutilla) maricopella subsp. maricopella Schuster, 1958
Sphaeropthalma (Micromutilla) maricopella subsp. castanea Schuster, 1958
Sphaeropthalma (Micromutilla) californiense subsp. californiense Schuster, 1958
Sphaeropthalma (Micromutilla) californiense subsp. fuscatella Schuster, 1958
Sphaeropthalma (Micromutilla) quijotoa subsp. quijotoa Schuster, 1958
Sphaeropthalma (Micromutilla) quijotoa subsp. parrasia Schuster, 1958