Jerarquía taxonómica:
Staphylinidae → Philonthus longicornis Stephens, 1832

Familia:
Staphylinidae

Autor:
Stephens, 1832

Sinónimos:
Philonthus cervicalis Casey, 1915
Philonthus fumosus Solsky, 1868
Philonthus perplexus Fairmaire & Germain, 1861
Philonthus promtus Erichson, 1840
Philonthus scutellatus Casey, 1915