Key to Solariola species

1. Small to medium size (2.65–3.00 mm), pronotum generally of slender appearance, elytral setae generally long and often more or less raised, aedeagus slender and with narrow apex......................................... (S. gestroi group)...2

- Medium to large size (3.06–3.65 mm), pronotum with strongly rounded sides, elytral setae short to very short, very little or not raised, aedeagus wide and with blunt apex................................................. (S. doderoi group)....8

2. Anterior femora triangularly dilated or sub-dentate............................................. paganettii (Flach)

- Anterior femora edentate, clubbed in the middle and narrowing at apex........................................... 3

3. Elytral setae strongly raised (angle with elytral surface often ≥ 45°).............................................. 4

- Elytral setae slightly raised (angle with elytral surface often ≤ 30°)............................................... 5

4 Rostral carinae weakly convergent at base of rostrum, median lobe of aedeagus strongly constricted medially............................................................................................. vitalei A. Solari & F. Solari

- Rostral carinae convergent at base and apex of rostrum, median lobe of aedeagus with sides parallel or slightly convergent medially.................................................................................. fraterna n. sp.

5 Last four articles of funicle transverse or subtransverse......................................................... 6

- Last four articles of funicle, or at least two articles, not transverse or subtransverse................................... 7

6 Last four articles of funicle globose, very strongly transverse, apex of aedeagus abruptly and strongly curved, spermathecal cornu slim with pointed apex hirtula (A. Solari & F. Solari)

- Last four articles of funicle subtransverse, apex of aedeagus moderately curved, spermathecal cornu broad with rounded apex......................................................................................... pesarinii n. sp.

7 Sides of pronotum weakly rounded, last four articles of funicle longer than wide, apex of aedeagus narrowly sharp, smaller body size (<3 mm)............................................................. gestroi (A. Solari & F. Solari)

- Sides of pronotum strongly rounded, at least the last article of funicle wider than long, larger body size (> 3 mm)......... 8

8 Elytral setae short, strongly curved, apex often touching elytral surface, elytral lateral declivity before the 4th stria........ 9

- Elytral setae long, slightly curved, apex never touching elytral surface, funiculus elongate, elytral lateral declivity after the 4th stria.......................................................................... doderoi A. Solari & F. Solari

9 Elytral setae longer than pronotal ones, rarely touching elytral surface, funiculus with only segment 7 wider than long, sides of pronotum strongly rounded, elytral lateral declivity after the 3rd stria......................... ruffoi Osella & Di Marco

- Elytral setae shorter than pronotal ones, often touching elytral surface, funiculus with segments 5–7 wider than long, sides of pronotum moderately rounded, elytral lateral declivity after the 2nd stria................................ angelae n. sp.