lz77a7 adults have a severe mutant eye phenotype. Ommatidia have too few cells or extra cells. Ectopic cell death is seen in third larval instar eye discs, between rows 7 and 12 posterior to the morphogenetic furrow.
Eye colour: red. Eyes of mutant flies are shiny compared to controls. The ocelli appear reasonably normal under low power SEM. The eyes have corneal nipples which look much like those of control flies under high power SEM except with more irregularities.
Rough eye phenotype: facets with multiple R7-like cells. 10% ommatidia have abnormal numbers of cells. The fenestrated membrane at the base of the retina is faulty; the holes through which the photoreceptor axons pass are enlarged and irregularly spaced. The sheer size of these holes allows entire clusters of photoreceptor cells to form an abnormal layer that displaces the first optic ganglion of the brain. Transheterozygotes with lzgal4 exhibit severely roughened eyes.
Homozygotes have a severe rough eye phenotype. Lenses are fused or missing, and some lenses are ruptured. Bristles of the hair nerve group are missing. There is a total lack of ommatidial structure. The eyes have mottled pigmentation and black pock marks are visible on the surface of the eye. Defects in the structure of pigment cells are seen and the number of photoreceptor cells per ommatidium is abnormal. Failure of the fenestrated membrane is apparent, with holes allowing photoreceptor neurons to intermingle with interneurons of the lamina. The retina is smaller than normal. lz1/lz77a7 and lz77a7/lzg females show disruption of the ommatidia and black pock marking confined to the anterior portion of the eye.
The number of large and small basiconic sensilla on the antennal funiculus is greatly reduced in hemizygous males, and the number of trichoid sensilla on the antennal funiculus is increased. The number of coeloconic sensilla on the antennal funiculus is normal. The density of the coeloconic and trichoid sensilla on the antennal funiculus is increased and the density of the basiconic sensilla on the antennal funiculus is decreased compared to wild-type.