Cophomantella cubiculata is a moth in the family Lecithoceridae. It was described by Edward Meyrick in 1911. It is known from the Seychelles (Silhouette). The wingspan is 12–13 mm. The forewings are fuscous with a dark fuscous basal patch occupying two-fifths of the wing, edged by an irregularly sinuate cloudy line of whitish-ochreous suffusion. The second discal stigma is well marked, transverse and dark fuscous and there is a small whitish spot on the costa at four-fifths, where an irregularly sinuate cloudy whitish-ochreous line runs to the dorsum before the tornus. The hindwings are grey.