Psilodon, PERTY, 1830

Grossi, Paschoal Coelho & Aguiar, Nair Otaviano, 2014, Discovery of a Third Stag Beetle Genus in the Amazonian Region, with Description of a New Species ofPsilodonPerty (Coleoptera: Lucanidae: Syndesinae: Syndesini), The Coleopterists Bulletin 68 (1), pp. 83-90 : 83-90

KEY TO THE SPECIES OF PSILODON PERTY

1. Antennae with six lamellae, body usually robust ............................................................................ 2

1′. Antennae with seven lamellae, body slender. Bolivia............................. P. gilberti Boucher

2. Pronotum completely punctate, rugose; punctures coalescent. External lobe of male mandibles (beta) tooth-like. Colombia.................. ............................... P. aequinoctiale (Buquet)

2′. Pronotum not rugose, instead smooth and weakly to densely punctate; punctures never coalescent. External lobe of male mandibles (beta) obsolete or rounded............................3

3. Male mandibles with a patch of dense setae inside apex and lateral lobe obsolete, almost joined to basal tooth; mentum transversely excavated. Pronotum with 4 foveae, two on each side, and with deep median longitudinal furrow. Metasternum glabrous around discrimen ............................................................................ 4

3′. Male mandibles with scattered setae, never forming a dense patch, and with a distinct lateral, basal, rounded lobe (b); mentum not excavated. Pronotum with only a shallow longitudinal furrow; lateral foveae absent. Metasternum with 2 setose areas around discrimen ......................................................................... 5

4. Male and female pronota weakly punctate at sides; mandibles with simple medial tooth; sdistance between medial mandibular tooth and apical fork longer than distance between 2 teeth of apical fork ........ P. seguyi (Didier)

4′. Male and female pronota strongly punctate at sides; mandibles with medial tooth bicuspidate; distance between medial mandibular tooth and apical fork subequal or shorter than distance between 2 teeth of apical fork....................... ..... P. luki (Onore, Bartolozzi, and Zilioli)

5. Male mandibles slightly deflexed, with internal surface visible from above. Pronotum strongly and uniformly punctate; punctures moderate to coarse, even on disc. Female unknown ...... ............................... P. buhrnheimi Grossi and Aguiar , new species