Phalloidin-labeled macula utriculi, macula sacculi and macula lagenae of the three investigated cichlid species. E. maculatus shows a distinctly broader lacinia of the macula utriculi (A), a larger macula lagenae (D), and a wider ostium (see explanation in Figure 5) of the macula sacculi (G) than H. guttatus (C, F, I) and S. tinanti (B, E, H). The red squares indicate the patches on the macula lagenae and the macula sacculi chosen for ciliary bundle counts. a, anterior; d, dorsal; me, medial. Scale bars, 100 μm (A-C, G-I), 50 μm (D-F).