Figure 3.

Properties of the compound eyes of workers, alate females and males of Myrmecia ants. (a) Eye maps, (b) facet size distribution and (c) cross-sections through the ommatidia in the medio-frontal region at the level of the distal rhabdom. (a) Eye maps are to scale with colour indicating the facet area (see inset colour bar; scale bar, 0.5 mm). See top left inset for orientation: p, posterior; d, dorsal; a, anterior; v, ventral; (b) Relative frequency distribution of facet area for a worker, alate female and alate male of each species. (c) Rhabdoms are the dark circular structures at the centre of each ommatidium. Numbers in the inset show mean rhabdom diameters (±s.d.; n = 10 for each caste). Scale bar = 10 µm. Otherwise conventions as before.