Orthogonius gracililamella 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 : 59-60

publication ID

https://dx.doi.org/10.3897/zookeys.164.1992

persistent identifier

https://treatment.plazi.org/id/23CF10A4-691E-8744-D3AD-B9BE2C521E13

treatment provided by

ZooKeys by Pensoft

scientific name

Orthogonius gracililamella Tian, Deuve & Felix
status

sp. n.

Orthogonius gracililamella Tian, Deuve & Felix   ZBK sp. n. Figures 620

Diagnosis.

Moderate or small sized, member of the Orthogonius longicornis species group, eyes very large; mentum asetose; apex of elytra shortly and obliquely truncate at inner margin of the tip to form an obvious sutural angle between elytra; labrum slightly emarginate at frontal margin; prosternal process bordered at apex, base of elytra complete; hind tarsomere 4 slightly emarginate at apex, hind femur quite slender, with two setae posteriorly, all tarsal claws strongly pectinate; ventrite VII very slightly emarginate at apical margin; aedeagus with apical lamella long and parallel-sided.

Length: 12.0-13.0 mm; width: 5.0-5.5 mm. Habitus as in Figure 6.

Description.

Light dark brown (HT) to black (PT), palps, antennae, lateral expanded margin of pronotum, tibiae, femora and trochanters lighter.

Wrinkles and punctures: surface impunctate except elytral intervals 3, 5 and 7 with tiny, and sparse punctures arranged as a row, head wrinkled, pronotum faintly striate.

Microsculptural meshes isodiametric on elytra, head and pronotum.

Head as long as wide, eyes very large, strongly prominent; frons and vertex convex, frontal impressions faint, clypeus bisetose, even; labrum quadrate, sexsetose, frontal margin slightly emarginate at frontal margin; mandibles well developed; ligula small and narrow, bisetose at apex; palpi slender, subcylindrical, maxillary palpomere 3 as long as 4, glabrous; labial palpomere 2 longer than 3, 2-setose in inner margin; labial palpomere 3 sparsely pubescent; palpiger asetose, mentum asetose, and submentum with one pair of setae; mentum without median tooth. Antennae extended to near basal 1/4 of elytra; pubescent after basal 1/4 of antennomere 4, antennomeres 4-5, slightly dilated, antennomere 3 shorter than 4 (about 0.7 times as its length).

Pronotum strongly transverse, PW/PL=1.56, moderately convex; sides evenly rounded, widest at about middle, both basal and fore margins beaded, lateral expanded margins well defined, uneven, slightly reflexed; fore and hind angles rounded; fore transverse impression unclear, hind one distinct, basal foveae small, but well marked, middle line clear.

Elytra ovate, EL/EW=1.60, convex, basal border complete, sides slightly expanded, not parallel at middle, striae deep, intervals convex, intervals subequal in width in middle; apex roundly truncate, but shortly and obliquely truncate at inner margin of the tip to form an obvious sutural angle between elytra; interval 3 with three setae, all are well marked; interval 7 not carinate, without seta.

Middle coxa glabrous in median portion; hind coxa with two setae. Legs moderate, fore tiba with outer angle rectangular, serrate on outer margins, apical margin oblique; middle tibia straight in middle, abruptly dilated at apex; hind tibiae slender, slightly dilated only at apex; hind tibial spurs very long and sharp; tarsomere 4 much longer than tarsomere 3 (almost 1.25 times as long), tarsomere 4 very shallowly emarginate at apex; hind femora rather slender, with two setae posteriorly; all tarsal claws strongly pectinate.

Prosternal process well bordered at apex. Apical margin of abdominal ventrite VII very shallowly and slightly emarginate.

Male genitalia (Figure 20): Moderately elongate, ventral margin more or less sinuate ventrally, apex pointed in lateral view; in dorsal view, apical lamella very long and nearly parallel-sided.

Female. Unknown.

Remarks.

The apical portion of the aedeagus is very elongate, a little more twisted in the holotype than in the paratype, and the apical lamella is slender and parallel-sided, with the apex broadly rounded.

Material examined.

Holotype: male, "Thailand: Loei: Phu Kradueng NP, Huay Lao Kao, 16° 52.442N, 101° 50.706E, 280 m, Malaise trap, 29-30.viii.2006, Sutin Khonglassae leg. T490", in QSBG.

Paratype: 1 male, "Thailand: Chaiyaphum: Tat Tone NP, water supply station at Taad Fah waterfall, 15° 56.468N, 102° 05.855E, 245 m, Malaise trap, 5-12.ix.2006, Tawit Jaruphan & Orawan Budsawong leg., T686", in QSBG.

Etymology.

The name refers to the long and narrow apical lamella of aedeagus.

Distribution.

Thailand. Known only from the type locality.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Carabidae

Genus

Orthogonius