Brachinus (Brachynidius) suturellus Chaudoir, 1876

Akhil, S. V., Divya, M. & Sabu, K. Thomas, 2020, Bombardier beetles of genus Brachinus Weber, 1801 (Carabidae: Brachininae Brachinini) from India, Zootaxa 4816 (4), pp. 576-600 : 593

Brachinus (Brachynidius) suturellus Chaudoir, 1876

Fig. 3b

Brachinus suturellus Chaudoir, 1876: 69 ; Bates, 1892: 394; Vuillet, 1912: 17; Andrewes, 1930a: 52; Hrdlička, 2003: 216; 2017: 478.

Type locality. India: North India, coll. Dr. Bacon and Captain Boys.

Type depository. MNHN .

Specimen examined (n=1). Syntype labelled “North India, coll. Dr. Bacon and Captain Boys” .

Description. Length 8.5 mm. Head, pronotum, elytral sutural line, scutellum, region around scutellum, femur, first two antennal segments dark reddish yellow; tibia and tarsi pale reddish yellow; antennal segments 3–11 dark reddish brown; eyes grey; elytra brownish black.

Head stout, wider than long, vertex smooth, shiny, glabrous; frons, region around eyes and neck punctated, pubescent; eyes protruding; antennae stout, segments wide, short, not reaching the middle of the elytra; segment 2 very short, segment 3 shorter than segment 1.

Pronotum shiny, punctated, densely pubescent; disc with apical margin outwardly sinuate, without lateral portion of apical margin projecting forward, basal margin slightly outwardly sinuate; disc laterally with anterior half convex, posterior half slightly divergent, hind angles pointed, at right angles, not projecting laterally; median groove shallow, not reaching the apical and basal margin; anterior transverse foveae moderately deep; lateral bead broad, dark brown.

Elytra subparallel, shiny, punctated, pubescent, with short golden brown setae; base narrowed, humerus present, rounded; apex without re-entrant angle; scutellum small, wider, blunt; striations weak, keel shaped, intervals broad, carinate; sutural line extending from region around scutellum to apex, gradually narrowing from base to apex, broadest at base; having narrow reddish yellow apical band.

Distribution. INDIA: Uttarakhand: Almora; Uttar Pradesh: Lucknow; Himachal Pradesh: Narpur (Kangra); Bengal: Bowali; Jharkhand: Barway; Madhya Pradesh: Dr. Ambedkar Nagar (Mhow); Karnataka: Belgavi, Bengaluru. MYANMAR: Tharawaddy, Rangoon. VIETNAM: Cochinchina.

Figures

FIGURE 3. Dorsal habitus of Indian Brachinus species (cont.): a) B. stevensi Andrewes, 1924 (holotype, BMNH); b) B. suturellus Chaudoir, 1876 (syntype, MNHN); c) B. vigilans Chaudoir, 1876 (syntype, MNHN)