Hexachaetus laevissimus Chaudoir, 1878

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 : 549-550

Hexachaetus laevissimus Chaudoir, 1878

( Figure 8 )

Chaudoir, 1878: 6; Csiki, 1932: 1592; Jedlička, 1963: 524.

Length: 16.5 mm; Breadth: 7.0 mm. Habitus as in Fig. 8 .

Diagnosis. Large sized, dark reddish brown, disk of head and pronotum darker, legs with tibiae darker than femora; head slightly longer than wide, HL/HW=1.1, labrum emarginate at frontal margin, clypeus 6-setose, eyes large and prominent, pronotum transverse, PW/PL=1.65, widest behind middle; elytra elongate-ovate, EL/ EW=1.58; slightly convex, well bordered at base, sides paralleled at middle, apex obliquely emarginated, with outer angle broad, inner angle pointed; elytral striae very shallow, intervals very flat; legs moderate, fore tibia stout, dilated at apex, outer angle somewhat rectangular, obtuse; claws weakly pectinate, femora without long setae, replaced by a few short ones, hind tibial spurs long and sharp, hind tarsomeres 3 and 4 subequal in length, tarsomere 4 deeply bilobed.

Male: Unknown.

Material. 1 female, labeled “ Sumatra ”, “Coll. Kraatz.”, “Ex Deutsch. Ent. Mus.”, “ H. E. Andrewes Coll. B. M. 1945-97 ”, “ Hexachaetus laevissimus Chaud. , compared with type. E. B. B.”, and “ Hexachaetus laevissimus Chaud. H. E. Andrewes det”, deposited in NHML, London.

Remarks. There is no specimen under the label “ Hexachaetus laevissimus Chaud. ” in Chaudoir’s Collection, MNHN. That means the type is probably lost.

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

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 5 – 8. Habitus of Hexachaetus species (5. H. maculatus Tian & Deuve, male, the holotype; 6. H. kirschenhoferi n. sp., male, holotype (photo: E. Kirschhofer); 7. H. brunki n. sp., male holotype; 8. H. laevissimus Chaudoir, 1878, female. Scale bar: 5.0 mm)