Orthogonius aberlenci, Tian, Mingyi & Deuve, Thierry, 2016

Tian, Mingyi & Deuve, Thierry, 2016, Definition of the jianfengling species group of the ground beetle genus Orthogonius MacLeay (Coleoptera, Carabidae, Orthogoniini), ZooKeys 615, pp. 95-117 : 103-107

Taxon classification Animalia Coleoptera Carabidae

Orthogonius aberlenci sp. n. Figs 3e, 8, 18, 31-32

Holotype.

Male, label: "Laos: Province de Khammouane, rivière Hin Boun, Ban Nathan, campe de l’Agame, 17°59.773'N / 104°49.395'E, V. 2012, Piège Lumineux, IBCFL, Opération Canopée, H.-P. Aberlenc leg.", in MNHN.

Paratypes.

1 male & 3 females, in MNHN, SCAU and CIRAD (Montpellier).

Diagnosis.

A medium-sized and stout species, with a shiny, smooth, and glabrous body which is brownish in general, and having an edentate mentum, a well bordered prosternal process and setose midcoxae.

Description.

Length: 15.0-16.5 mm; width: 6.0-6.5 mm. Habitus as in Fig. 8.

Middle sized, stout, strongly shiny, smooth and glabrous. Head black; palps, pronotum, elytra, the 1 st– 3rd antennomeres, legs and ventral surface brownish; labrum, clypeus, the 4th to 11th antennomeres dark brown. Head and pronotum impunctate, elytral odd intervals with a few fine and feeble punctures. Microsculptural engraved meshes isodiametric on elytra, indistinct on head and pronotum.

Head as long as wide, eyes moderate and prominent, frons and vertex convex, frontal impressions large and deep, extending posteriorly to the level of anterior supraorbital pores; clypeus bisetose, basal portion decorated by three short, longitudinal furrows which crossing base of clypeus and joining frontal impressions on either sides, and against frons medially; labrum sex-setose, moderately emarginate at apical margin; palps stout, subcylindrical, the 3rd maxillary palpomere slightly shorter than the 4th, glabrous on the 4th, the 3rd with three short setae at apex; the 2nd labial palpomere slightly longer than the 3rd, bisetose on inner margin, with several additional setae at subapex and apex, the 3rd labial palpomere with a few setae at basal part; ligula small, bisetose at apex; mentum edentate; each of mentum and submentum bisetose, setae subequal in length, palpiger asetose. Antennae moderately long, extending over base of elytra; pubescent from basal 1/3 of the 4th antennomere, where evidently expanded; the 3rd antennomere almost as long as the 4th, the 1st with a long seta at subapex.

Pronotum strongly transverse, PW/PL = 1.65, disc quite flat, apical and basal margins well beaded, sides evenly expanded, widest at middle; base wider than apex, bisinuate on base, slightly and widely concave on apical margin; lateral expanded margins well defined, narrow, evenly and distinctly reflexed; fore transversal impression faint, hind one distinct, basal foveae small but deep.

Elytra elongate, EL/EW = 1.70-1.75; widest at about middle, almost parallel-sided at middle, basal border complete, apex widely and nearly obliquely truncated on outer margin, then reversely truncated nearly the tip, inner angle nearly rectangular, not denticulate (Fig. 18); striae moderately deep, intervals convex, intervals subequal in width in middle, the 3rd interval with three setiferous pores; the 7th interval normal.

Legs moderately long, hind femora moderately expanded, with three posterior setae in male and four or five in female; fore tibiae expanded at apex, with outer angle shortly protruded, outer margin sub-serrate; middle coxae glabrous in holotype, but with one to three setae in median portion in other specimens, hind coxae smooth and glabrous; middle tibiae not modified in male, quite straight, serrate, gradually expanded towards apex; hind tibiae slightly expanded at apex, apical spurs very long and sharp, the 1st hind tarsomere distinctly longer than the 2nd, the 3rd as long as the 4th which deeply and symmetrically bilobed at apex; all tarsal claws weakly pectinate.

Prosternal process bordered at apex. Abdominal ventrite VII of male complete, with two pairs of setae on either side of apical margin in both male and female.

Male genitalia (Fig. 31-32): Short and stout, dorsal opening wide and long, somewhat expanded medially, gently bisinuate ventrally towards apex, which short and blunt in lateral view; apical lamella short and small, not parallel-sided, wider than long, apex broad.

Remarks.

It is probably allied to Orthogonius limbourgi sp. n. as they have similar structure of aedeagus. But it is easily separated from Orthogonius limbourgi and Orthogonius politior sp. n. by its short and more convex body, and short apical lamella of the aedeagus.

Etymology.

The name of this new species is in honor of the collector, Henri-Pierre Aberlenc (CIRAD, Montpellier), an excellent entomologist and a friend of the second author.

Distribution.

Laos (Fig. 3e).