Orthogonius pseudochaudoiri
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Ordo: Coleoptera
Familia: Caraboidea
Genus: Orthogonius
Name
Orthogonius pseudochaudoiri Tian, Deuve & Felix sp. n. – Wikispecies link – ZooBank link – Pensoft Profile
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.
Original Description
- Tian, M; Deuve, T; Felix, R; 2012: Orthogonius species and diversity in Thailand (Coleoptera, Caraboidea, Orthogoniini), a result from the TIGER project ZooKeys, 164: 51-90. doi
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