Orthogonius pseudochaudoiri Tian, Deuve & Felix

Tian, Mingyi, Deuve, Thierry & Felix, Ron, 2012, Orthogonius species and diversity in Thailand (Coleoptera, Caraboidea, Orthogoniini), a result from the TIGER project, ZooKeys 164, pp. 51-90 : 60-63

Orthogonius pseudochaudoiri Tian, Deuve & Felix sp. n. Figures 7-921

Diagnosis.

Small to medium sized, labrum straight at frontal margin; prosternal process well bordered at apex, abdominal ventrite VII slightly emarginate at apical margin; very similar to Orthogonius mouhoti Chaudoir, 1871, but apical lamella of the aedeagus much longer than that of the latter species.

Length: 12.5-16.0 mm; width: 5.5-7.0 mm. Habitus as in Figures 7-9.

Description.

Dark brown to black, lateral expanded margin of pronotum, antennae, mouthparts palpi, legs and underside surface reddish brown.

Wrinkles and punctures: surface smooth and impunctate; head and pronotum faintly striate, odd elytral intervals (3, 5, 7) with distinct fine punctures which are irregularly rowed; surface strongly shiny.

Microsculptural meshes densely isodiametric, clear on elytra, but faint on pronotum and head.

Head stout, as long as wide; eyes very large, strongly prominent, frons and vertex moderately convex, frontal impressions small, short, fovea-like, clypeus bisetose, rather even, labrum sexsetose, nearly straight at apical margin; ligula very small and narrow, bisetose at apex; palpi slender, subcylindrical, normal; palpiger asetose, mentum without median tooth, asetose, mentum and submentum each with one pair of setae. Antennae slender, extended beyond basal 1/3 of elytra, pubescent from apical 2/3 of antennomere 4; antennomeres 3, 4 and 5 subequal in length; antennomeres 1-3 glabrous; antennomeres 4-6 distinctly expanded laterally.

Pronotum strongly transverse, PW/PL=1.88-1.90, sides evenly rounded, widest at about middle, both basal and fore margins beaded, lateral expanded margins well defined, wide and even, flat and smooth; both fore and hind angles rounded; disc strongly convex, fore transverse impression faint, basal one moderate, basal foveae small.

Elytra broadly ovate (EL/WL=1.55-1.57), strongly convex, basal border well complete; sides slightly expanded in middle portion, hardly parallel-sided, widest at middle; striae deep, punctate-striate, intervals distinctly convex; intervals 2-5 subequal in width, interval 6 much wider than 5; odd intervals with more distinct fine punctures, irregular in row; apex roundly truncate, inner angle finely toothed, and with a wider sutural angle; interval 3 with three well marked setiferous pores, near striae 3, 2 and 2, respectively; interval 7 simple, wide and not carinate, without seta throughout.

Legs moderate, fore tibia with outer angle nearly rectangular, blunt, outer margin not serrate; middle and hind coxae smooth and glabrous; middle and hind tibia slender, apex slightly dilated, hind apical tibial spurs very long and sharp; tarsomere 3 much longer than 4, tarsomere 4 deeply emarginate at apex (about 1/3 deep as the joint); all tarsal claws strongly pectinate; hind femur with 2 posterior setae on ventral.

Prosternal process well bordered at apex; apical margin of abdominal ventrite VII narrowly and shallowly emarginate in male.

Male genitalia (Figure 21): Very similar to that of Orthogonius chaudoiri , straight, and arrowhead-shaped at apex in dorsal view, but more distinctly so than in Orthogonius chaudoiri , upper margin less sinuate, and apical lamella in dorsal view much longer and more elongate.

Female. Unknown.

Remarks.

This species is very similar to Orthogonius chaudoiri , but the apex of its aedeagus is more distinctly arrowhead-shaped than that of Orthogonius chaudoiri , less sinuate, and apical lamella much longer; labrum slightly emarginate (straight in latter); body a little more slender; and ventrite VII of male with a small emargination at apical margin.

Variability.

Shape of the arrow-headed apex of the aedeagus is variable, wider in some specimens, but narrower in others; however, in all specimens of this species examined, the apical lamella is much longer than that of Orthogonius chaudoiri .

Material examined.

Holotype: male, "Thailand: Phetchabum, Thung Salaeng Luang NP, Gang Wang Nam Yen, 16° 37.531N, 100° 53.745E, 721 m, Malaise trap, 17-24.v.2007, Pongpitak Pranee & Sathit leg., T2082", in QSBG.

Paratypes: 1 male, data as holotype; 6 males, "Thailand: Phetchabun: Thung Salaeng Luang NP, pine forest, 16°35.789'N, 100°52.769'E, 732 m, Malaise trap,15-22.vi.2007, Pongpitak Pranee & Sathit leg., T2059"; 3 males, "Thailand: Phetchabum, Thung Salaeng Luang NP, Gang Wang Nam Yen, 16° 36.284N, 100° 53.128E, 749 m, Malaise trap, 29. vi– 6.vii.2007, Pongpitak Pranee & Sathit leg., T2087"; 2 males, "Thailand: Phetchabun: Thung Salaeng Luang NP, pine forest;G ang Wang Nam Yen, 16°36.284'N, 100°53.128'E, 749 m, 15.vi.2007-18.vi.2007, Litter sample, Pongpitak & Sathit leg., T2050"; 1 male, " Thailand: Phetchabun: Thung Salaeng Luang NP, pine forest; Gang Wang Nam Yen, 16°36.284'N, 100°53.128'E, 749 m, 30.vi.2007-3.vii.2007, Litter sample, Pongpitak & Sathit leg., T2051"; 6 males, "Thailand: Phetchabun: Thung Salaeng Luang NP, pine forest; Gang Wang Nam Yen, 16°36.284'N, 100°53.128'E, 749 m, 16-17.vi.2007, Pan traps, Pongpitak & Sathit leg., T2052"; 1 male, "Thailand: Phetchabun: Thung Salaeng Luang NP, pine forest; Gang Wang Nam Yen, 16°36.284'N, 100°53.128'E, 749 m, 18-19.vi.2007, Pan traps, Pongpitak & Sathit leg., T2054"; 5 males, "Thailand: Phetchabun: Thung Salaeng Luang NP, pine forest; Gang Wang Nam Yen, 16°36.284'N, 100°53.128'E, 749 m, 20-21.vi.2007, Pan traps, Pongpitak & Sathit leg., T2056"; 1 male, "Thailand: Phetchabun: Thung Salaeng Luang NP, pine forest; Gang Wang Nam Yen, 16°36.284'N, 100°53.128'E, 749 m, 21-22.vi.2007, Pan traps, Pongpitak & Sathit leg., T2057"; 7 males, "Thailand: Phetchabun: Thung Salaeng Luang NP, pine forest; Gang Wang Nam Yen, 16°36.284'N, 100°53.128'E, 749 m, 22-23.vi.2007, Pan traps, Pongpitak & Sathit leg., T2058"; 1 male, "Thailand: Phetchabun: Thung Salaeng Luang NP, pine forest; Gang Wang Nam Yen, 16°36.284'N, 100°53.128'E, 749 m, 22-29.vi.2007, Malaise trap, Pongpitak & Sathit leg., T2063"; 3 males, "Thailand: Phetchabum, Thung Salaeng Luang NP, Gang Wang Nam Yen, pine forest, 16° 35.789N, 100° 52.769E, 723 m, Malaise trap, 6-13.vii.2007, Pongpitak Pranee & Sathit leg. T 2068"; 6 males, "Thailand: Phetchabum, Thung Salaeng Luang NP, Gang Wang Nam Yen, 16° 36.284N, 100° 53.128E, 749 m, Malaise trap, 29. vi– 6.vii.2007, Pongpitak Pranee & Sathit leg., T 2069"; 2 males, "Thailand: Phetchabum, Thung Salaeng Luang NP, Gang Wang Nam Yen, pine forest, 16° 35.805N, 100° 52.286E, 726 m, Malaise trap, 6-13.vii.2007, Pongpitak Pranee & Sathit leg., T 2070"; 3 males, "Thailand: Phetchabun: Thung Salaeng Luang NP: Gang Wang Nam Yen, 750 m, 16°36.587'N, 100°53.395'E; 17-24.v.2007, Pongpitak Pranee & Sathit leg., T2080"; 7 males, "Thailand: Phetchabum, Thung Salaeng Luang NP, Gang Wang Nam Yen, 16° 37.178N, 100°. 53.504E, 706 m, Malaise trap, 17-24.v.2007, Pongpitak Pranee & Sathit leg., T2081"; 1 males, "Thailand: Phetchabun: Thung Salaeng Luang NP, Gang Wang Nam Yen, 16°36.587'N, 100°53.395'E, 753 m, 24-31.v.2007, Malaise trap, Pongpitak Pranee & Sathit leg., T2083"; 2 males, "Thailand: Nakhon Nayok: Khao Yai NP, Lum Ta Kong View Point, 14°25.82'N, 101°23.754'E, 744 m, 26.iv.2007-2.v.2007, Malaise trap, Pong Sandao leg., T2132"; 5 males, "Thailand: Nakhon Ratchasima: Khao Yai NP, Cobra zone near fire protection office, 14° 27.511N, 101°22.408'E, 760 m, 5-12.vi.2007, Malaise trap, Pong Sandao leg., T2223"; 1 male, "Thailand: Nakhon Ratchasima: Khao Yai NP, Cobra zone near fire protection office, 14° 28.285N, 101°22.57'E, 751 m, 12-19.vi.2007, Malaise trap, Wirat Sukho leg., T2225"; 1 male, "Thailand: Nakhon Ratchasima: Khao Yai NP, Cobra zone near fire protection office, 14° 27.511N, 101°22.408'E, 760 m, 12-19.vi.2007, Malaise trap, Wirat Sukho leg., T2226"; 1 male, "Thailand: Nakhon Nayok: Khao Yai NP, entrance of Hnong Pak Chee Trail, 14°27.115'N, 101°21.951'E, 733 m, 5-6.v.2007, Pan traps, Pong Sandao leg., T2256"; 5 males, "Thailand: Nakhon Nayok: Khao Yai NP, entrance of Hnong Pak Chee Trail, 14°27.115'N, 101°21.951'E, 733 m, 5-12.v.2007, Malaise traps, Wirat Sukho leg., T2264"; 4 males, "Thailand: Nakhon Nayok: Khao Yai NP, entrance of Hnong Pak Chee Trail, 14°27.115'N, 101°21.951'E, 733 m, 12-19.v.2007, Malaise traps, Pong Sandao leg., T2267"; 3 males, "Thailand: Nakhon Nayok: Khao Yai NP, entrance of Hnong Pak Chee Trail, 14°27.119'N, 101°21.482'E, 699 m, 12-19.v.2007, Malaise traps, Wirat Sukho leg., T2268"; 2 males, "Thailand: Nakhon Nayok: Khao Yai NP, entrance of Hnong Pak Chee Trail, 14°27.167'N, 101°21.85'E, 758 m, 19-26.v.2007, Malaise traps, Wirat Sukho leg., T2269"; 2 males, "Thailand: Nakhon Nayok: Khao Yai NP, entrance of Hnong Pak Chee Trail, 14°27.115'N, 101°21.951'E, 733 m, 19-26.v.2007, Malaise traps, Pong Sandao leg., T2270"; 2 males, "Thailand: Nakhon Nayok: Khao Yai NP, entrance of Hnong Pak Chee Trail, 14°27.119'N, 101°21.482'E, 699 m, 19-26.v.2007, Malaise traps, Wirat Sukho leg., T2271"; 1 male, "Thailand: Nakhon Nayok: Khao Yai NP, entrance of Hnong Pak Chee Trail, 14°27.167'N, 101°21.85'E, 758 m, 26.v.2007-2.vi.2007, Malaise traps, Wirat Sukho leg., T2272"; 2 males, "Thailand: Nakhon Nayok: Khao Yai NP, entrance of Hnong Pak Chee Trail, 14°27.115'N, 101°21.951'E, 733 m, 26.v.2007-2.vi.2007, Malaise traps, Pong Sandao leg., T2273"; 1 male, label lost; in QSBG, MNHN, SCAU and CRF, respectively.

Etymology.

The name refers to the similarity of this new species to Orthogonius chaudoiri .

Distribution.

Thailand. Known only from the type localities.