Lecanicillium longisporum is the approved name of an entomopathogenic fungus species, that was previously widely known as Verticillium lecanii (Zimmerman) Viegas, but is now understood to be an anamorphic form in the Cordyceps group of genera in the Cordycipitaceae. It now appears that isolates formerly classified as V. lecanii could be L. attenuatum, L. lecanii, L. longisporum, L. muscarium or L. nodulosum. L. longisporum is now marketed as 'Vertalec', for management of aphid pests, by Koppert in the Netherlands (who provide good illustrations of the fungus).