Key to the species of the Pselaphogenius fiorii species group

1. Antennomers III–VIII at least twice as long as wide. ♂: Metaventrite raised in middle in conical process whose apex is located in its anterior half. First abdominal ventrite with longitudinal median depression on its entire length. ♀: last abdominal tergite rounded at apex.................................................................................. P. fiorii

- Antennomers III–VIII slightly longer than wide............................................................ 2

2. Medial elytral antebasal fovea slightly larger than lateral. Elytral carina weakly-defined. ♂: Metaventrite always raised in conical process, never with longitudinal impression............................................................ 3

- Medial elytral antebasal and lateral fovea equal in size. Elytral carina well-defined. ♂: Metaventrite never raised in conical process, always with longitudinal impression.............................................................. 10

3. Head at least in dorsal region distinctly reticulated and punctate, matt. Pronotum finely reticulated..................... 4

- Head and pronotum smooth and shiny.................................................................... 7

4. Pronotal lateral foveae clearly impressed and deep.......................................................... 6

- Pronotal lateral foveae slightly impressed and shallow....................................................... 5

5. ♂: Metaventrite raised in middle in conical process rounded at the apex; dorsal surface of first ventrite raised in middle from base up to about 2/3 of its length, whose surface is entirely occupied by depression. ♀: Last abdominal tergite bearing long and stout median spine prolonged backwards....................................................... .. P. chloe n. sp.

- ♂: Metaventrite raised in middle in conical process pointed at apex, latter located in its anterior half; dorsal surface of first ventrite occupied almost for the entire length by median longitudinal oval-shaped depression. ♀: Last abdominal tergite ending in pointed tip.............................................................................. P. aspromontanus

6. Pronotum slightly finely wrinkled. ♂: Aedeagus partially asymmetric with ventral lamina. Metaventrite raised in middle in conical process pointed at apex, latter located in middle. ♀: Unknown................................... P. lucanicus

- Pronotum clearly wrinkled. ♂: Aedeagus symmetric without ventral lamina. Metaventrite raised in middle in conical process pointed at apex, latter located in its posterior half. ♀: Last abdominal tergite rounded at the apex........... P. neapolitanus conical process pointed at apex. ♀: Last abdominal tergite pointed at apex................................ P. calabrus - Eyes more developed (9–10 facets), elytral lateral carina very short. ♂: Metaventrite raised in middle in large conical process rounded at apex..................................................................................... 8

7. Eyes less developed (4–5 facets), elytral lateral carina reaching about ½ of elytral length. ♂: Metaventrite raised in middle in

8. ♂: Aedeagus with apical lamina strongly recurved at apex. ♀: Unknown.................................. P. gardinii

- ♂: Aedeagus with apical lamina straight at apex............................................................ 9

9. ♀: Last abdominal tergite prolonged into large and short conical tooth................................ P. conosternum

- ♀: Last abdominal tergite prolonged into long pointed spine......................................... P. argentarius

10. Head dorsally clearly wrinkled and matt. Eyes with 6–7 facets. ♀: Last abdominal tergite rounded at apex........ P. latinus

- Head dorsally smooth or with some punctures, always shiny. Eyes with 8–12 facets. ♀: Last abdominal tergite ending in short and small conical tooth................................................................................ 11

11. Eyes with 10–12 facets, dorsal surface of head not punctate, last palpomere 0.38–0.40 mm long............ P. peloritanus

- Eyes with 8–9 facets, dorsal surface of head slightly punctate, last palpomere 0.35–0.36 mm long............... P. carusoi