Figure 5.

Eye and head defects associated with coracle hypomorphs. Scanning electron micrographs of adult eyes (A–E; anterior is to the left) and dorsal surface of heads (F and G). (A) cor⁵/CyO (wild-type) eye showing normal morphology. (B) A cor²/cor¹⁵ eye displays roughening across the equator (arrow). (C) In a cor⁸/cor¹⁴ eye, an area of the eye has been replaced by head cuticle with associated bristles (arrow). (D) Higher-magnification view of a cor⁵/CyO (wild-type) eye near the equator. Notice the regular hexagonal shape of the ommatidia and the precise spacing of the bristles. (E) Higher-magnification view of a cor⁸/cor¹⁴ eye near the equator. Notice the irregularity in size and shape of the ommatidia and scarcity and misplacement of the bristles. (F) A dorsal view of a cor⁵/CyO (wild-type) head showing the normal arrangement of three ocelli and associated bristles. (G) A dorsal view of a cor⁴/cor¹⁵ head missing the ocelli and all associated bristles.