Key of species of Phidon Rehn, 1933 (males)

The key of Rehn 1933 is here updated for males. P. dubius males are unknown (Princis 1952). Thus, this species is not included in this key.

1. Brachypterous................................................................... Phidon chanco Vera, 2019

- Wings well-developed................................................................................. 2

2. Tegmina with Sc vein fused at base with radial.............................................................. 3

- Tegmina with Sc vein not fused at base with radial........................................................... 4

3. Tegmina surpassing apex of abdomen by less than pronotal length; 7 unforked radials; pronotal disk with pigmentation disposed in two lateral bands and spots; total body length less than 10 mm ......................... Phidon bullocki Rehn, 1933

- Tegmina surpassing apex of abdomen by more than pronotal length; 8–9 unforked radials; pronotal disk with central drawing as an inverted trident shape crowned by three spots, the central elongated, total body length between 15.5–20 mm ......................................................................................... Phidon abismus sp. nov.

4. Pronotum symmetrically trapezoidal in outline; disk of same with pattern of dark punctulae, not broadly maculate laterad. Tegmina with discoidal sectors less definitely phylliform in character or branching; all terminal veins or rami with numerous raised and infuscate points...................................................... Phidon araucanus Rehn, 1933

- Pronotum transverse elliptical in outline; disk of same with dark punctulae and laterad also broadly maculate. Tegmina with discoidal sectors distinctly phylliform in character and bifurcation; tegminal veins and rami without raised infuscate points......................................................................... Phidon reticularis Blanchard, 1851