Gynaecoserica bomdilana, Ahrens & Fabrizi, 2009

Ahrens, Dirk & Fabrizi, Silvia, 2009, A review of the genus Gynaecoserica Brenske, 1896 (Coleoptera, Scarabaeidae, Sericini), Journal of Natural History 43 (25 - 26), pp. 1505-1584 : 1531-1533

publication ID	https://doi.org/ 10.1080/00222930902968809
persistent identifier	https://treatment.plazi.org/id/0399C459-DB30-6F45-FE5F-FBCD5A4E0CFE
treatment provided by	Felipe
scientific name	Gynaecoserica bomdilana
status	sp. nov.

Treatment

Gynaecoserica bomdilana sp. nov.

( Figures 2A–C View Figure 2 , 6F View Figure 6 , 10A View Figure 10 )

Type material examined

Holotype. Ƌ “NE India, W.-Arunachal Pr. W of Bomdila ; 2600 m, 27°16¢N, 92°24¢E, 17.v.2005 L. Dembický leg.” ( TICB) . Paratypes. 1 Ƌ, 3 ♀♀ “NE India, W.-Arunachal Pr. W of Bomdila ; 2600 m, 27°16¢N, 92°24¢E, 17.v.2005 L. Dembický leg.” ( TICB, CA) .

Description

Length 6.8 mm, length of elytra 4.7 mm, width 3.7 mm. Body oblong, dorsal surface dark brown with numerous yellowish spots on elytra, antenna yellowish, dorsal surface dull, head shiny, entire surface sparsely setose.

Labroclypeus subtrapezoidal, widest at base, lateral margins distinctly curved, evenly convergent to the moderately rounded anterior angles, margins weakly reflexed, lateral border and ocular canthus producing a distinct blunt angle, anterior margin shallowly sinuate medially; surface distinctly convex medially, finely and very densely punctate, punctures touching each other, with a few coarser punctures behind anterior margin bearing long, erect setae; frontoclypeal suture feebly incised and medially moderately curved; smooth area in front of eye approximately as wide as long; ocular canthus short and slender, finely and densely punctate, with a fine terminal seta. Frons entirely shiny, with fine and moderately dense punctures, glabrous except some erect setae behind frontoclypeal beside eyes. Eyes moderately large, ratio of diameter: interocular width 0.56. Antenna yellow, with 10 antennomeres; club with four antennomeres, 1.2 times as long as the remaining antennomeres combined, antennomere VI transverse but not produced. Mentum weakly elevated and flattened anteriorly.

Pronotum widest at base, lateral margins straight and subparallel in basal half, in anterior half weakly curved and convergent anteriorly, anterior angles strongly produced and moderately sharp, posterior angles blunt, anterior margin convexly produced medially, with a distinct fine marginal line, basal margin without marginal line; surface with moderately dense, fine punctures, with minute setae in the punctures; anterior and lateral borders thinly setose; hypomeron distinctly margined at base but not ventrally produced. Scutellum long and narrow, triangular, with fine and very dense punctures, at base medially smooth, microscopic setae present in the punctures.

Elytra moderately long, widest shortly behind the middle, striae feebly impressed and finely and densely punctate, intervals weakly convex, with fine and moderately dense punctures mostly concentrated along the striae, some punctures with minute setae, odd intervals with single coarse punctures each bearing a strong white seta being erect or adjacent, interior apical angle of elytra with a strong seta; epipleural edge moderately robust, ending at the strongly curved external apical angle of elytra, epipleura densely setaceous, apical border without short microtrichomes.

Ventral surface dull, with fine and moderately dense punctures, sparsely setose, metacoxa only laterally with a few strong adjacent setae; each abdominal sternite with indistinct transverse row of coarse punctures bearing short setae between fine, dense punctation, penultimate sternite apically with a shiny smooth sclerotized bor- der, which is one-sixth as long as sternite, last sternite medially twice as long as the penultimate one. Mesosternum between mesocoxae as wide as mesofemur, with irregularly scattered very strong setae. Ratio of length of metepisternum: metacoxa: 1: 1.42. Pygidium strongly convex, coarsely and densely punctate, with broad smooth midline, surface dull, with numerous long yellowish setae.

Legs slender and moderately long; femora dull, with two longitudinal rows of setae, finely and sparsely punctate; metafemur sharply margined anteriorly and without a submarginal serrate line, posterior margin weakly convex and glabrous, its external part only weakly widened in apical half and not serrate, internally finely serrate, with short setae. Metatibia slender and moderately long, evenly widened toward apex, ratio width: length: 1: 3.3, dorsally distinctly carinate over the entire length, with two groups of spines, basal one at one-third, apical one at three-quarters of metatibial length, basally with a few single, fine spines in the punctures; external face slightly longitudinally concave, with sparse, fine punctures, glabrous; ventrally edged and serrate, with four equally distant, strong spines; medial face impunctate, apex interiorly near tarsal articulation sharply and deeply truncate. Tarsomeres dorsally glabrous and impunctate, ventrally with sparse, short setae; metatarsomeres ventrally with a strongly serrate ridge, beside which is a fine longitudinal carina, laterally slightly carinate (in cross-section 90° displaced from ventral ridge), first metatarsomere distinctly shorter than the following two tarsomeres combined and more than twice as long as the upper tibial spur. Protibia moderately long, bidentate, protarsal claws symmetrical.

Aedeagus shown in Figure 2 View Figure 2 (A–C).

Variation

Length 6.8–6.9 mm, length of elytra 4.7–4.8 mm, width 3.7–3.8 mm. Female: antennal club with three antennomeres, distinctly shorter than the remaining antennomeres combined, eyes as large as in male; pygidium flattened on disc, before apex medially with a sharp triangular elevation arising from the central flat pygidial surface.

Diagnosis

The new species is similar to G. variipennis ( Moser, 1916) and G. gogonaica Ahrens, 2004 but it differs by the short parameres being one-third as long as phallobase.

Etymology

The new species is named according to the village Bomdila in close vicinity to the type locality .