Hexachaetus maculatus Tian et Deuve, 2004

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 : 544-545

Hexachaetus maculatus Tian et Deuve, 2004

( Figures 5 , 12–13 )

Tian & Deuve, 2004: 26

Length: 18.0 mm; width: 8.0 mm. Habitus as in Fig. 5 .

Diagnosis. Large sized, body moderately elongate-ovate, smooth, polish, and impunctate; yellowish, head and longitudinal median portion of pronotum black, elytral black marking vase-like; ligula 6-setose, clypeus bisetose, middle tibia slightly dilated, and somewhat curved in male; pronotum strongly convex, transverse, PW/PL=1.66, lateral expanded margin not well defined, flat and hardly reflexed, hind angle more or less angular though broad; elytra elongate-ovate, EL/EW=1.60, sides more or less parallel at middle, widest at about middle; strongly and obliquely truncate at apex, inner apical angle acute and denticulate, striae shallow, outer angle broad and rounded, inner angle very sharp and denticulate at tip; fore tarsi stouter than middle and hind ones; tarsal claws moderately pectinate; male genitalia ( Figs. 12–13 ): moderate elongate, slightly dilated in median portion, dorsal opening wide and long; ventral margin strongly sinuate; in dorsal view apical lobe gently contracted towards apex, apical lamella broad, as long as wide, broadly rounded at apex.

Female: Unknown.

Remarks. The species is similar to H. lateralis (Guérin) , but is identical by its vase-like elytral black marking, slender male genitalia with a thin apical lamella which is not dilated preapically.

Material. 1 male, the holotype, “ Sumatra, Palembang, J. Bouchard” and “ Hexachaetus maculatus n. sp. det. Tian et Deuve, 2004 ”, in MNHN.

Distribution. Indonesia ( Fig. 20 c).

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)

FIGURES 12 – 19. Male genitalia of Hexachaetus species, right lateral view and dorsal view for apical lamella (12 – 13. H. maculatus Tian & Deuve; 14 – 15. H. kirschenhoferi n. sp.; 16 – 17. H. brunki n. sp.; 18 – 19. H. vietnamensis n. sp.)