It might have a much wider range, since material which might belong to this species has been recorded from Honduras and Mexico.

The mine has the form of a long, slender, serpentine gallery, with a relatively broad, dark brownish, median frass trail, almost always located on the upper (adaxial) side of the leaf.

The median frass line is unusually broad for a species of Phyllocnistis, resembling more that of the Chilean genus Prophyllocnistis.

Pupation occurs in the lamina, away from the leaf edge in a circular nidus, similar to that fashioned by Prophyllocnistis.

The specific name is derived from the Greek, hyper (meaning above, over) and the generic plant name of its host, Persea, in reference to the characteristic leafmining habit of the larva on the upperside of the leaf.