Lathrobium, Gravenhorst, 1802

Anlaş, Sinan, 2024, On the microphthalmous Lathrobium Gravenhorst species of Turkey V. A new species from Çorum province and an updated key for the microphthalmous Lathrobium species of Turkey (Coleoptera: Staphylinidae: Paederinae), Zootaxa 5447 (3), pp. 433-438 : 437-438

Key to the microphthalmous Lathrobium species of Turkey

The keys to Turkish microphthalmous species in Assing (2001, 2007) and Anlaş (2018, 2021, 2022, 2023) are modified as follows:

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

– Eyes partially reduced, with> 30 ommatidia............................................................... 7.

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

– Aaedeagus strongly asymmetrical....................................................................... 6.

3. Male sternite VII with extensive clusters of dark setae, posterior incision of male sternite VIII distinctly asymmetrical. Distribution: Amasya ( Anlaş 2022: figs 10‒18)......................................... L. amasiacum Anlaş, 2022

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

4. Aedeagus large, 1.11‒1.18 mm, with small protrusion apically in ventral view; posterior incision of male sternite VIII deep, female sternite VIII strongly modified. Distribution: Tokat ( Anlaş 2022: figs 1‒9).............. L. tokatense Anlaş, 2022

– Aedeagus smaller, 0.75‒0.85 mm, and bifid apically in ventral view; posterior incision of male sternite VIII relatively shallower, female sternite VIII unmodified......................................................................... 5.

5. Ventral process of aedeagus apically slender in lateral and ventral view; median impression posteriorly in male sternite VIII present. Distribution: Ordu: Gürgentepe pass and Mesudiye ( Assing 2001: figs 30−36; Anlaş, 2023: figs 1−11)...................................................................................... L. brignolii Bordoni, 1980

– Ventral process of aedeagus apically stout in lateral and ventral view; median impression posteriorly in male sternite VIII absent. Distribution: Ordu: Aybastı, Kabadüz, Tekkiraz and Ulubey ( Anlaş 2023: figs 12−22)..... L. orduense Anlaş, 2023

6. Head with pronounced microreticulation; pronotum narrower in relation to head; posterior incision of male sternite VIII shallowe, aedeagus small, 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

7. Micro-pubescence on median posterior area of female sternite VIII absent; area with modified dark setae of male sternite 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 sternite VIII present; area with modified dark setae of male sternite VII extending farther anteriad.............................................................................. 8.

8. Apical sclerotized structure of endophallus hook- or barb-shaped in lateral view................................... 9.

– Apical sclerotized structure of endophallus not hook- or barb-shaped in lateral view............................... 10.

9. Male sternite 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 sternite 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 2021: figs. 19‒64)............................................... L. bodemeyeri Bernhauer, 1903

10. Light colouration of abdominal segments III–VI; apical sclerotized structure of endophallus shaped like a spine, basally and apically slightly curved in lateral view. Distribution: Çorum (Anlaş present paper: figs 1−8).... L. corumense Anlaş , sp. n.

– Darker colouration of abdominal segments III–VI; apical sclerotized structure of endophallus shaped like a straight spine or bipartite and protruding in lateral view.................................................................. 11.

11. Light colouration of the forebody; aedeagus small 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