Trichotaenia

Key to the species of Trichotaenia with distinct humeri

Taking into account part of the identification key for the Trichotaenia species given by Schüle (2011), we present an updated key of the representants with distinct shoulders, including the new species:

1. Clypeus and labrum glabrous............................................................................ 2

- Clypeus setose, labrum more or less sparsely setose.......................................................... 3

2. Ventral sides completely pubescent..................................................... T. tereticollis (Boheman)

- Pubescence of ventral side reduced to genae and proepisterna...................................... T. allardi Cassola

3. Remnants of depigmented, whitish spots under the elytral pubescence......................... T. duplosetosa (W. Horn)

- No remnants of depigmented spots under the elytral pubescence................................................ 4

4. Elytral pubescence forming a dense and large, whitish sutural band in basal half of elytra............ T. suturata (W. Horn)

- Elytral pubescence not forming a dense and large, whitish sutural band in basal half of elytra, sometimes pubescence is arranged to indistinct, longitudinal stripes................................................................. 5

5. Pronotum cordiform or slightly subcordiform, basal lobe distinctly narrower than apical lobe......................... 6

- Pronotum subquadrate, as wide as long, or slightly longer than wide, basal lobe as wide as apical lobe or slightly narrower.. 8

6. Elytral pubescence with transversal band before the middle, absence of a subapical arcuate band; pubescence of pronotum denser in lateral and middle portions............................................... T. pseudosuturalis (W. Horn)

- Elytral pubescence with transversal band in the middle or slightly behind the middle, presence of a subapical arcuate band; pubescence of pronotum dense only in lateral portions........................................................ 7

7. Elytral first-third with a continuous pubescent band connecting diagonally the submarginal band and the base of the scutellum; proepipleura not visible from above........................................................... T. nzingae sp. n.

- Elytral first-third with a short and dense diagonal pubescent band near the base of the scutellum; proepipleura slightly visible from above.............................................................................. T. pepetela sp. n.

8. Apex of elytra sparsely pilose, elytral punctures in basal half isolate, not anastomosing to longitudinal chains.............9

- Apex of elytra with well-defined densely pilose area, elytral punctuation in basal half coarse, anastomosing to longitudinal chains.............................................................................................. 10

9. Elytral punctuation coarser, alveoli slight sharply walled, elytral pilosity not arranged to longitudinal stripes in basal half (up to here specimens of T. tereticollis with a few additional clypeal and labral setae).................. T. tereticollis (Boheman)

- Elytral punctuation finer, alveoli most slightly flattened walled, elytral pilosity arranged into longitudinal stripes in basal half............................................................................. T. pseudotereticollis (W. Horn)

10. Elytral pubescence with transversal band around the middle, notopleural suture indistinct........... T. rivalieri Basilewsky

- Elytral pubescence with transversal band behind the middle, notopleural suture distinct................ T. kudrnai Cassola