Chlaenius (Pachydinodes) posticus ( Fabricius, 1798 )

Ullah, Mishkat, Naeem, Muhammad, Mahmood, Khalid & Garner, Beulah, 2022, Addition to the knowledge of Tribe Chlaeniini Brullé, 1834 (Coleoptera: Carabidae) from Pakistan, Zootaxa 5115 (4), pp. 451-486 : 474

Chlaenius (Pachydinodes) posticus ( Fabricius, 1798)

( Fig. 8b )

Carabus posticus Fabricius, 1798: 57 ; Chlaenius neelgheriensis Guérin-Méneville, 1840: 38 ; Chlaenius bilunatus Guérin-Méneville, 1843: 36 ; Chlaenius formosus Chaudoir, 1856: 206 ; Chlaenius binotulatus Motschulsky, 1865: 341 .

Material examined. PAKISTAN — Azad Jammu & Kashmir • 1 ♂; Kotli , Bang Dharmna; 12 Aug. 2013; Mishkat leg.; PMNH • 1 ♀; Azad Jammu & Kashmir, Kotli , Sarda rest House; 12 Aug. 2013; Mishkat leg.; PMNH • 1 ♂; Islamabad , Rawal Lake; 23 Aug. 2016; Mishkat leg.; PMNH

Measurements. Male (n=10): TL= 15.39 mm, HW= 2.88 mm, PL= 3.24 mm, PW= 4.36 mm, EL= 9.04 mm, EW= 2.85 mm. Ratios PL/PW= 0.78, HW/PW= 0.66 and EL/EW= 3.17. Female (n=10): TL= 13.23 mm, HW= 2.44 mm, PL= 2.80 mm, PW= 3.85 mm, EL= 7.72 mm, EW= 2.49mm. Ratios PL/PW= 0.71, HW/PW= 0.63 and EL/EW= 3.10.

Diagnosis. Head metallic green with metallic purple tinge, clypeus smooth, frons vertex and neck slightly rugose and moderately punctate. Pronotum colour same as head, quadrate shaped, apical border sparsely setiferous punctate to basal border densely setiferous punctate; lateral bead reddish brown, both anterior and posterior angles blunt, basolateral fovae deep and densely punctate. Elytra matt black with sub apical wavy mark on each elytron spread over intervals II–VIII, intervals flat densely setiferous punctate. Venter black shining; proepisternum and mesepisternum with few deep punctures; metepisternum and metepimeron moderately covered with deep punctures.

Comments. Ch. (P.) posticus appears similar to Ch. (P.) tiomanensis Kirschenhofer, 2015 in general habitus. It differs on the basis of body size wider than the latter; antennal articles I–XI reddish brown where as antennal article I–III reddish brown and IV–XI blackish in latter; pronotum less punctate while densely punctate in tiomanensis ; elytra subapical mark slightly transverse in posticus and elongated in latter. In this current study this species was collected from Kotli (Azad Jummu & Kashmir) and Islamabad. This is the first time this species is reported from Pakistan.

Distribution. China (Fujian), India, Nepal, Sri Lanka, Taiwan (Anichtchenko 2017; Lorenz 2018) and Pakistan (first country record).

Figures

FIGURE 8. Dorsal habitus (a) Chlaenius (Pachydinodes) pictus Chaudoir, 1856 imaged from NHMUK collection; (b) Chlaenius (Pachydinodes) posticus (Fabricius, 1798) imaged from NHMUK collection; (c) Chlaenius (Parachlaenites) chlorodius Dejean, 1826 imaged from NHMUK collection; (d) Chlaenius (Parachlaenites) pretiosus Chaudoir, 1856 imaged from NHMUK collection.