Exceptia neopetrella is a moth in the Gelechiidae family. It was described by Keifer in 1936. It is found in North America, where it has been recorded from California. The wingspan is 12–13 mm. The forewings are light ashen grey, the scales infused fuscous below the tip and again tipped white. There are cattered slightly ochreous scales, especially on the dorsum. An almost faint oblique dark shade is found from costal third, ending in the general dark central coloration. The plical stigma is blackish at about one-third and the first discal is the same, somewhat beyond the plical and half way between it and the dorsum. The second discal is found at two-thirds in the center of the wing. The stigmata tend to be surrounded by white. The hindwings are fuscous.