Chlaenius (Ocybatus) bioculatus Chaudoir, 1856

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 : 471

Chlaenius (Ocybatus) bioculatus Chaudoir, 1856

( Fig. 7a )

Chlaenius bioculatus Chaudoir, 1856: 198 .

Material examined. PAKISTAN • 1 ♀; Islamabad; 22 Jun. 2005; M. Abbas leg.; PMNH • 1 ♀; “ N.W. India ” [Khyber Pakhtunkhwa]; NHMUK (B.M. 1884-19) ; NHMUK .

Measurements. Female (n=10): TL= 12.24 mm, HW= 2.66 mm, PL= 2.54 mm, PW= 3.29 mm, EL= 7.66 mm, EW= 2.43 mm. Ratios PL/PW= 0.77, HW/PW= 0.81 and EL/EW= 3.15.

No males were studied / available for study.

Diagnosis. Head and pronotum black with metallic green coppery tinge. Labrum, mandibles, palpomeres, antennal articles I–III and all legs reddish brown; rest of antennal articles from IV–IX dark brown to light brown. Clypeus smooth with minute punctures, frons, vertex and neck smooth with slightly wrinkled surface moderately covered with minute to medium sized punctures. Pronotum transverse, anterior margin more convex and basal margin almost straight; lateral border/sides more regularly convex or rounded; antero-lateral angles slightly prodtuding whereas postero-lateral angles rounded and obtuse; surface densely covered with uniform sized deep wide punctures, lateral furrow narrow throughout, latero-basal fovae short wide, and deep. Elytra matt black with intervals VIII and IX metallic deep bluish tinge, apical 1/3 rd with wavy yellowish-brown mark spread over interval IV–VIII; humeral angle rounded, striae deep and densely punctate; intervals slightly convex/raised densely covered with setiferous punctures, pubsence golden. Ventral side shining black, prosternum, proepimeron, anterior border mesepisternum, metepisternum, metepimeron and first abdominal sternum moderately covered with wide deep fovae, rest of the abodominal sternites finely punctate.

Comments. Chlaenius (O.) bioculatus closely resembles Chlaenius (L.) rufifemoratus rayotus Bates, 1891 by possessing a similar pronotal sculpture. Ch. (O.) bioculatus pronotum transverse, lateral margins almost unbent specially toward postero-lateral angles. While, Ch. (L.) rufifemoratus rayotus pronotum elongated, pronotal lateral margin well developed and bent upward at postero-lateral angles. This is the first time this species is reported from Pakistan. It is a widely distributed species in Asia except Japan. This current study extends its geographical range up into Pakistan.

Distribution. Andaman Island, Bangladesh, Myanmar ( Burma), Bhutan, China, Indonesia (Sumatra), India, Japan, Nepal, Sri Lanka, Thailand, Viet Nam (Anichtchenko 2017; Lorenz 2018), Hong Kong, Singapore and Pakistan (first country record).

Figures

FIGURE 7. Dorsal habitus (a) Chlaenius (Ocybatus) bioculatus Chaudoir, 1856 imaged from NHMUK collection; (b) Chlaenius (Ocybatus) orbicollis Chaudoir, 1876 imaged from NHMUK collection; (c) Chlaenius (Pachydinodes) hamifer (Chaudoir 1856); (d) Chlaenius (Pachydinodes) leucops (Wiedemann, 1823) imaged from NHMUK collection.