Updated identification key to the microphthalmous Lathrobium species of Turkey

The keys to Turkish microphthalmous species in Assing (2001, 2007) and Anlaş (2018, 2021) are modified to include the newly descibed taxa:

1. Eyes strongly reduced, without ommatidia.................................................................. 2

– Eyes weakly reduced, with> 30 ommatidia................................................................. 6

2. Aedeagus almost symmetrical.......................................................................... 3.

– Aaedeagus strongly asymmetrical........................................................................ 5.

3. Male sternum VII with extensive clusters of dark setae, posterior incision of male sternum VIII distinctly asymmetrical. Distribution: Amasya (present paper: figs 10‒18)............................................ L. amasiacum sp. n.

– Male sternum VII without clusters of dark setae, posterior incision of male sternum VIII symmetrical.................. 4.

4. Posterior incision of male sternite VIII deeper, aedeagus larger, 1.11‒1.18 mm, with a small protrusion apically in ventral view; female sternite VIII strongly modified. Distribution: Tokat (present paper: figs 1‒9).................. L. tokatense sp. n.

– Posterior incision of male sternite VIII shallower, aedeagus smaller, 0.80‒0.85 mm, and bifid apically in ventral view; female sternite VIII weakly modified. Distribution: Ordu (Assing, 2001: figs 30−36)................. L. brignolii Bordoni, 1980

5. Head with pronounced microreticulation; pronotum narrower in relation to head; posterior incision of male sternite VIII shallower, aedeagus smaller, 0.60–0.65 mm. Distribution: Gümüşhane (Assing, 2007: figs 1−12).. L. distortum Assing, 2007

– Head with shallow microreticulation; pronotum broader in relation to head; posterior incision of male sternite VIII deeper, aedeagus larger, approximately 0.9 mm. Distribution: Giresun (Assing, 2007: figs 13−22)......... L. deforme Assing, 2007

6. Micro-pubescence on median posterior area of female sternum VIII absent; area with modified dark setae of male sternum VII confined to posterior median emargination; apical sclerotized structure of endophallus spoon-shaped apically in lateral view. Distribution: Çorum (Anlaş, 2021: figs 1‒10).............................................. L. kacari Anlaş, 2021

– Micro-pubescence on median posterior area of female sternum VIII present; area with modified dark setae of male sternum VII extending farther anteriad............................................................................. .. 7.

7. Apical sclerotized structure of endophallus hook- or barb-shaped in lateral view................................... 8.

– Apical sclerotized structure of endophallus shaped like a straight spine or bipartite and protruding in lateral view......... 9.

8. Male sternum VIII with pubescence present along median line, with slightly smaller apical emargination; apical sclerotized structure of endophallus barb-shaped in lateral view. Distribution: Kastamonu (Assing, 2001: figs 17−21; Anlaş, 2018: figs. 18−24)......................................................................... L. uncinatum Assing, 2001

– Male sternum VIII without pubescence along median line, with larger apical emargination; apical sclerotized structure of endophallus hook-shaped in lateral view. Distribution: Northwestern Anatolia (Assing, 2001: figs 8−16; Anlaş, 2018: figs. 11−17; Anlaş, figs. 19‒64).................................................... L. bodemeyeri Bernhauer, 1903

9. Lighter colouration of the forebody; aedeagus smaller 0.9 mm; apical sclerotized structure of endophallus shaped like a straight spine in lateral view. Distribution: Yozgat (Anlaş, 2018: figs. 1−10)........................... L. newtoni Anlaş, 2018

– Darker colouration of the forebody; aedeagus larger 1.15−1.20 mm; apical sclerotized structure of endophallus bipartite and protruding in lateral view. Distribution: Amasya (Anlaş, 2021: figs 10‒18)........................ L. celiki Anlaş, 2021