Tychobythinus algiricus, 1896

Sabella, Giorgio, Viglianisi, Fabio Massimo, D’Urso, Vera & Nouira, Said, 2014, A review of the Tychobythinus algiricus species group from North Africa (Coleoptera: Staphylinidae: Pselaphinae), Zootaxa 3893 (4), pp. 579-586 : 585

Key to identification of Tychobythinus algiricus species group

1. Head with frontal lobe 0.11 mm wide, punctate in its posterior region, occipital region with slight impressed median sulcus, antennal scape at least 3.5 times longer than wide, antennomere 2 distinctly longer than wide, pronotum without pleural carina, ventral margin of profemora with some tubercles............................................................. 2

- Head with frontal lobe 0.12–0.13 mm wide, impunctuate in its posterior region, occipital region with short median carina, antennal scape at most 3 times longer than wide, antennomere 2 slightly longer than wide, pronotum with pleural carina, ventral margin of profemora without tubercles.......................................................... T. algiricus

2. Posterior region of frontal lobe strongly punctate, lateral margins of male head with stout and truncated median tooth, antennal scape 4 times longer than wide, antennomere 2 of male as wide as scape and not modified, antennomeres 6 and 7 as wide as 5 and 8, protrochanters with 2 tubercles............................................................ T. atlanticus

- Posterior region of frontal lobe slightly punctate, lateral margins of male head without median tooth, antennal scape 3.5 times longer than wide, antennomere 2 of male slightly wider than scape, its ventral margin prolonged into rounded well-marked protrusion, antennomeres 6 and 7 slightly wider than 5 and 8, protrochanters without tubercles................ T. escalerai