Mesochorus (Mesochorus) politus Gravenhorst, 1829

Riedel, Matthias & Varga, Oleksandr, 2022, A checklist of the subfamily Mesochorinae (Hymenoptera, Ichneumonidae) from the Ukrainian Carpathians, Zootaxa 5100 (2), pp. 224-248 : 229-231

Mesochorus (Mesochorus) politus Gravenhorst, 1829 ( Fig. 9 )

Material examined. UKRAINE: lvano-Frankivsk Region : 1 ♂, Dibrova 5 km SW of Bogorodchany, 48.461035°N, 24.302028°E, 310 m, oak forest, 27.iv.2014 ; 1 ♀, Gorgany , m. Igrovets, 7 km SW of Stara Guta, 48.355468°N, 24.075256°E, 1375 m, border between coniferous forest and subalpine zone, Malaise trap 3, 2–20.vii.2014 ; 1 ♀, idem, 1500 m, sweeping, 20.vi.2013 ; Transcarpathian Region : 2 ♂♂, Chornogora , Sheshul, 6–7 km NE of Kvasy, 48.157193°N, 24.363658°E, 1450 m, subalpine zone, Malaise trap, 29.vi–18.vii.2014 ; 1 ♀, idem, 18.vii–10.viii.2014 ; 1 ♂, 3 ♀♀, Svydovets , 2–3 km NW of Kvasy, 48.090889°N, 24.155835°E, 850–900 m, beech forest, Malaise trap 2, 7.v–5.vi.2014 ; 1 ♀, Marmarosy , m. Mika-Mare, subalpine zone, sweeping, 30– 31.viii.2013 ; 1 ♀, Marmarosy , m. Pip-Ivan, subalpine zone, sweeping, 11–12.viii.2009 ; 1 ♀, Vynogradiv , oak forest, 280 m, 48.138338°N, 23.073689°E, Malaise trap 1, 2–17.v.2017 ; 2 ♀♀, idem, 17.v–10.vi.2017 ; 1 ♀, idem, Malaise trap 2, 2–17.v.2017 ; 1 ♀, idem, Malaise trap 3, 17.v–10.vi.2017 ; 1 ♀, idem, Malaise trap 4, 17.v–10.vi.2017 ; 1 ♀, idem, 2–20.v.2018 ; 1 ♀, idem, 7.vi–3.vii.2018, leg. O. Varga ( SIZK, ZSSM) .

Distribution. Palaearctic and Oriental regions; first record for Ukraine.

Taxonomical remark. Within the politus -group, this species is characterized by the scattered and fine punctures on mesopleuron; large ocelli (distance between lateral ocellus and eye 0.9–1.2 × ocellar diameter) and slender distal fore tarsomere (c. 2.5 × longer than wide). It has been misinterpreted as Mesochorus tuberculiger Thomson, 1886 by Schwenke (1999) (see Horstmann 2003).

dispar- group sensu Schwenke (1999: 48–59)

Figures

FIGURES 7–10. The Carpathian Mesochorus spp. 7—M. punctipleuris; 8—M. thomsonii; 9—M. politus; 10—M. discitergus.