Raw spectrophotometric data from the elytra of seven Onthophagus species (Coleoptera, Scarabaeidae)

[Description of methods used for collection/generation of data] Body mass, elytra area, elytra thickness and the proportion of darkness in the elytra of ten specimens from seven Onthophagus species were determined (n=70). Each specimen was subjected to spectrophotometric analysis on the external side of the left elytron using a Shimazu UV-2600 spectrophotometer, measuring light reflectance, transmittance and absorbance across the 185-1400 nm wavelenght spectrum at 5 nm intervals. The internal side of each elytron were also measured but only in the near-infrared range (NIR)