Download high resolution image here.
From Evans and Hogue(1)
, R. rex
"is unique among the species of Ripiphorus
in having a serrated outer edge of the middle tibiae".
This image is derived from a stack of 60 images with a 28 µm step taken with a Nikon CFN 4X/0.13 Plan Achromat
+ extension tube + Nikon D300 camera, and processed with CombineZP