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) Author Anlaş, Sinan text Zootaxa 2024 2024-05-07 5447 3 433 438 http://dx.doi.org/10.11646/zootaxa.5447.3.9 journal article 295859 10.11646/zootaxa.5447.3.9 0b58f08a-18e4-4ddf-95bb-8309b31c991b 1175-5326 11150175 B1AC37B6-1588-4667-95D5-41E861AB47D8 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