Scanning electron microscopy of Echinophthirius horridus (Von Olfers), Antarctophthirus callorhini (Osborn), and Proechinophthirius fluctus (Ferris) with emphasis on the antennal structures (Anoplura: Echinophthiriidae)

The high magnification of the scanning electron micorscope reveals that the first two antennal segments each have a sensillum placodeum, while the fourth and the fifth, the last two, each have a sensillum coelonicum. These latter sensilla are partially covered by prote