Hexachaetus lateralis lateralis (Guérin), 1843

Tian, Mingyi & Deuve, Thierry, 2016, Re-definition and review of the Oriental genus Hexachaetus Chaudoir, 1871 (Coleoptera: Carabidae: Orthogoniini), Zootaxa 4169 (3), pp. 540-554 : 543

Hexachaetus lateralis lateralis (Guérin), 1843

( Figure 1 )

Orthogonius lateralis: Guérin, in Delessert, 1843: 35

Hexachaetus lateralis (Guérin) : Chaudoir, 1871: 125; Csiki, 1932: 1592

Length: 17.0–18.0 mm; width: 7.0 mm. Habitus as in Fig. 1 .

Diagnosis. Large sized; head, pronotum, underside of head, metepimeron, tibiae and tarsi of legs, antennae and margins of elytra dark brown, majority part of elytra, underside, femora and coxae of legs, palps yellowish brown; elytral marking from base to apex along suture, anchoreaform, widest at base, then gradually contracted backwards, wider at middle, then trapped towards apex; strongly shiny, glabrous on disc, without wrinkle or puncture, palps normally subcylindrical, ligula wide, 6-setose; antennae short, extending only at shoulders of elytra; pronotum with lateral expanded margin glabrous and smooth, border unclear, slightly reflexed; elytra elongate-ovate, apex concavely truncated, outer angle distinct; elytral intervals 3 with two setiferous pores, located near base (close to stria 3) and subapex (closed to stria 2) respectively; fore tibia stout, outer apical angle distinct, somewhat rectangular; hind tibial spurs long and sharp, claws pectinate, hind tarsomere 4 bilobed; prosternal process unbordered at apex, abdominal ventrite VII slightly emarginated in median portion of apical margin in male; male genitalia very similar to that of H. lateralis maindroni ( Figs. 3–4 ).

Material. 1 male, “ Sumatra (Aceh), Ketambe , Leuser Nat. Park, 450 m, 26. II- 1, III, 1991, Bocák & Bocáková leg.”, in NHMB ; 1 female, “ Malacca, Coll. Castelnau”, “ Museo Civico di Genova ”, “ Hexachaetus lateralis Guérin, H. E. Andrewes det.”, in MCG ; 1 female, “Collection P. Dupuis”, “ Hexachaetus lateralis Det. P. Dupuis, 1914 ”, in IRSNB.

Distribution. Malaysia and Indonesia ( Fig. 20 a).

Figures

FIGURE 20. Distribution of Hexachaetus species (square: angulatus species group; round: lateralis species group; star: laevissimus species group; heart: vietnamensis species group; triangle: mulan species group; a. H. lateralis lateralis; b. H. lateralis maindroni; c. H. maculatus; d. H. kirschenhoferi n. sp.; e. H. brunki n. sp.; f. H. laevissimus; g. H. vietnamensis n. sp.; h. H. prodigus; i. H. mulan n. sp.)

FIGURES 1 – 4. Hexachaetus lateralis Guérin (1. H. lateralis lateralis Guérin, habitus, male (photo: E. Kirschhofer); 2. H. lateralis maindroni Tian et Deuve, habitus, male, holotype; 3. Median lobe of aedeagus of H. lateralis maindroni, lateral view; 4. ibid. apical lamella, dorsal view; Scale bar: 5.0 mm)