Figure 1.

Meral spot of Neogonodactylus oerstedii. (a) Dorsal view of a male (scale indicates 10 mm). Inset shows the ‘purple’ meral spot on the inside of the raptorial appendage (scale indicates 2 mm). (b) Mean spectral reflectance of ‘purple’ area of male and female meral spots collected from two habitats in Belize. Grey dashed line indicates separation between the UV and visible spectra used in luminance analysis (area under the curve). Sample sizes are as follows: female, rubble: n = 10; female, seagrass: n = 6; male, rubble: n = 4; male, seagrass: n = 9.