Mnesarchella hamadelpha is a species of primitive moth in the family Mnesarchaeidae.

However although M. hamadelpha is present in the same locations as M. acuta, it is usually found at higher altitudes or at later times in the year.

This species was first described by Edward Meyrick in 1888 and named Mnesarchaea hamadelpha.

[1] The male lectotype specimen was collected at Mount Arthur in January by Meyrick and is held at the Natural History Museum, London.

Hindwings rather dark purple-fuscous; cilia purplish-fuscous, with a whitish apical dot and small white median spot.

[1] Although M. hamadelpha is present in the same locations as M. acuta, it is usually found at higher altitudes or at later times in the year than M.