Chlaenius (Pseudochlaeniellus) celer Chaudoir, 1876

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 : 478

Chlaenius (Pseudochlaeniellus) celer Chaudoir, 1876

( Fig. 9a )

Chlaenius celer Chaudoir, 1876: 264 ; Chlaenius caudatus Landin, 1955: 451 ; Chlaenius indochinensis Mandl, 1978: 273 .

Material examined. PAKISTAN • 1 ♀; Khyber Pakhtunkhwa, Dera Ismail Khan ; 12 Sep. 1988; Dr. Muhammad Afzal leg.; Chlaenius (Pseudochlaeniellus) celer Chaudoir by Mishkat Ullah 2017 det.; PMNH • 2 ♀; same collection data as for preceding; 11 Sep. 1988; PMNH .

Measurements. Female (n=3): TL= 9.21 mm, HW= 1.71 mm, PL= 2.07 mm, PW= 2.89 mm, EL= 5.36 mm, EW= 1.80 mm. Ratios PL/PW= 0.71, HW/PW= 0.59 and EL/EW= 2.97.

No male specimens were studied / available for study.

Diagnosis. Head black with metallic greenish blue coloration; clypeus smooth, frons densely setiferous punctate, neck smooth. Mandibles dark brown, Labrum, palpomeres, antenna, pronotum lateral bead, elytral border and legs reddish brown. Pronotum colour same as head, almost shell shaped, basal margin broad, apical margin convex, maximum width near midpoint and sinuate basal margin; postero-lateral angles obtuse; surface sparsely to densely covered with wide-deep punctures from apical to basal margin. Elytra matt black with greenish blue tinge, striae deep and punctate; intervals slightly raised, granulated, densely setiferous punctate (seta colour yellowish grey), microsculpture isodiametrical.

Comments. Ch. (P.) celer looks similar to Ch. (P.) contractus Chaudoir, 1876 in body colouration and general appearance. It differes on the basis of being smaller in size and mentum tooth simple whereas Ch. (P.) contractus is bigger in size and mentum tooth bifid. In this current study, it was reported only from Dera Ismail Khan. This species is widely distributed from Pakistan to Myanmar. It is newly recorded from Pakistan.

Distribution. Myanmar ( Burma), Vietnam, India, Bangladesh (Anichtchenko 2017; Lorenz 2018) and Pakistan (first country record).

Figures

FIGURE 9. Dorsal habitus (a) Chlaenius (Pseudochlaeniellus) celer Chaudoir, 1876 imaged from NHMUK collection; (b) Chlaenius (Pseudochlaeniellus) puncticollis Dejean, 1826; (c) Chlaenius (Rhopalopalpus) janthinus Kollar & L. Redtenbacher, 1844 imaged from NIM collection; (d). Chlaenius (Stenochlaenius) kashmiricus (Grundmann, 1955).