Gynaecoserica lubosi, 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 : 1559-1561

publication ID	https://doi.org/ 10.1080/00222930902968809
persistent identifier	https://treatment.plazi.org/id/0399C459-DB1C-6F61-FDB8-FB355FBC0D3E
treatment provided by	Felipe
scientific name	Gynaecoserica lubosi
status	sp. nov.

Treatment

Gynaecoserica lubosi sp. nov.

( Figures 4A–C View Figure 4 , 7G View Figure 7 , 9B View Figure 9 )

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./ 23/04” ( TICB) . Paratypes. 6 ƋƋ, 10 ♀♀ same data as holotype ( CA, TICB) .

Description

Length 8 mm, length of elytra 3.8 mm, width 2.9 mm. Body oblong, dorsal surface yellowish brown with numerous dark brown dots on pronotum and elytra, antenna and legs yellowish brown, dorsal surface dull, moderately setose.

Labroclypeus subrectangular, widest at base, lateral margins subparallel, anterior angles strongly rounded, lateral border and ocular canthus producing a distinct blunt angle, margins moderately reflexed, anterior margin shallowly sinuate medially; surface weakly convex medially and shiny, finely and densely punctate, distance between punctures less than their diameter, with a few coarser punctures behind the anterior margin each bearing a long, erect seta; frontoclypeal suture feebly incised and slightly elevated, strongly curved; smooth area in front of eye approximately as wide as long; ocular canthus moderately long and slender, finely and densely punctate, with a short terminal seta. Frons anteriorly shiny, in posterior half dull; on anterior half with coarse and dense punctures, behind frontoclypeal suture with a few setae, posteriorly punctures finer and sparser. Eyes moderately large, ratio of diameter: interocular width 0.6. Antenna yellow, with 10 antennomeres; club dark, with six antennomeres, 1.5 times as long as the remaining antennomeres combined, antennomere IV distinctly longer than antennomere III, longitudinally slightly flattened. Mentum weakly elevated and flattened anteriorly.

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

Elytra moderately long, widest at middle, striae feebly impressed and finely densely punctate, intervals almost flat, with fine, sparsely scattered punctures concentrated along the striae, punctures with microscopic setae, odd intervals with numerous white robust setae being partly erect or adjacent; interior apical angle of elytra with a robust seta; epipleural edge fine, 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 robust setae; each abdominal sternite with indistinct transverse row of coarse punctures bearing short setae between fine, dense punctation. Pygidium strongly convex, densely punctate, with a broad smooth midline, with numerous robust, long white setae. Mesosternum between mesocoxae as wide as mesofemur, with irregularly scattered very strong setae. Ratio of length of metepisternum: metacoxa: 1: 1.3.

Legs slender and moderately long; femora dull, with two longitudinal rows of setae, finely and sparsely punctate; metafemur moderately shiny, sharply margined anteriorly and without a submarginal serrate line, posterior margin weakly convex and glabrous, ventrally only weakly widened in apical half and not serrate, dorsally very finely serrate, with a few long setae. Metatibia slender and moderately long, widest at apex, ratio width: length: 1: 3.3, dorsally longitudinally convex at base but in apical half finely carinate, with two groups of spines, basal one at one-third, apical one at two-thirds of metatibial length, basally with a few single, fine spines in the punctures; external face longitudinally convex, with moderately dense and coarse punctures, glabrous; ventrally edged and serrate, with three strong equidistant spines; medially 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, first metatarsomere twice as long as the upper tibial spur, metatarsomere III–V lacking in the holotype. Protibia moderately long, bidentate, protarsal claws asymmetrical, basal tooth of internal claw bluntly truncated.

Aedeagus shown in Figure 4 View Figure 4 (A–C).

Female unknown.

Variation

Length 5.8–6.0 mm, length of elytra 3.8–3.9 mm, width 2.9–3.0 mm. Female: antennal club with three antennomeres, as long as the remaining antennomeres combined.

Diagnosis

Gynaecoserica lubosi sp. nov. is very similar to G. arunachalensis sp. nov. in habitus and aedeagal shape. It may be differentiated from the latter by the ventral apical spine of the metatibia not being hooked and by the basal extension of the right paramere being small and sharply pointed.

Etymology

The new species is named after one of its collectors, my friend Luboš Dembický (Brno).