Tychobythinus theryi

Sabella, Giorgio, Nouira, Vera D’Urso Said, Souissi, Rhida & Besuchet, Claude, 2013, A review of Tychobythinus theryi species group with description of a new species from Algeria (Coleoptera, Staphylinidae, Pselaphinae), Zootaxa 3701 (1), pp. 63-75 : 74

Key to identification of Tychobythinus theryi species group

1. Head frontal lobe with antennal lobes separated and with conspicuous mediodorsal conical horn-like process bearing a long seta..................................................................................... .. T. monoceros

- Head frontal lobe without mediodorsal conical horn-like process............................................... 2

2. Tempora prolonged into a conspicuous acute spine.................................................. T. araneipes

- Tempora not prolonged into a conspicuous acute spine........................................................ 3

3. Tempora angulated, clypeal carina reaching temporal region........................................... T. normandi

- Tempora rounded, clypeal carina reaching ocular region....................................................... 4

4. Occipital carina very short reaching the middle of occipital region, antennal scape 5 times longer than wide.... T. longipalpis

- Occipital carina reaching at least the posterior margin of vertexal foveae, antennal scape at most 4 times longer than wide... 5

5. Antennae 0.550–0.560 mm long with antennomeres III–VI wider than long, palpomere III sligthly longer than wide, surface of metasternum strongly punctated.................................................................... T. theryi

- Antennae at least 0.660 mm long with antennomeres III–VI longer than wide, palpomere III distinctly longer than wide, sur- face of metasternum unpunctated......................................................................... 6

6. Lateral margin of last segment of maxillary palpi sligtlhy concave, occipital carina very long reaching posterior edge of median sulcus of frontal lobe, antennomeres VII–VIII longer than wide, mesofemora with 4–5 tubercles.......... T. bordei

- Lateral margin of last segment of maxillary palpi straigth, occipital carina reaching posterior edge of vertexal foveae, antenno- meres VII–VIII as long as wide, mesofemora without tubercles................................................. 7

7. Head frontal lobe 0.125 mm wide, antennae 0.680–0.690 mm long, aedeagus as in fig.17.................. T. peyerimhoffi

- Head frontal lobe 0.11 mm wide, antennae 0.650–0.660 mm long, aedeagus as in fig. 21............... T. besucheti sp. n.