Gynaecoserica compacta, 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 : 1533-1535

publication ID	https://doi.org/ 10.1080/00222930902968809
persistent identifier	https://treatment.plazi.org/id/0399C459-DB36-6F47-FE53-FCBD5A340C6E
treatment provided by	Felipe
scientific name	Gynaecoserica compacta
status	sp. nov.

Treatment

Gynaecoserica compacta sp. nov.

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

Type material examined

Holotype. Ƌ “NE India, Meghalaya state West Garo Hills reg., Tura 5.–7.V.1996 alt 700+ 100 m, GPS N 25°30.7 ¢ E 90°13.9 ¢ ( WGS 84 ) E. Jendek & O. Šauša leg./ 58 Sericini Asia spec.” ( TICB) GoogleMaps . Paratypes. 1 Ƌ “NE India; Meghalaya; 1999 3 km E of Tura ; 1150 m; 25°30¢ N 90°14 ¢E; 18.iv. Dembický & Pacholátko leg.” ( TICB) , 1 Ƌ “NE India; Meghalaya; 1999 3 km E of Tura ; 1150 m; 25°30¢ N 90°14 ¢E; 4.v. Dembický & Pacholátko leg.” ( TICB) , 2 ƋƋ, 1 ♀ “NE India Meghalaya 1400 m, Nokrek n.p., 3 km S Daribokgiri 25°27¢ N 90°19 ¢E, 26.iv.1999 Dembický & Pacholátko” ( CA, TICB) .

Description

Length 6.3 mm, length of elytra 3.9 mm, width 3.3 mm. Body oblong oval, surface dark reddish brown, dorsal surface shiny and sparsely setose.

Labroclypeus subrectangular, widest at base, lateral margins basally subparallel, anteriorly very strongly curved and convergent to strongly rounded anterior angles, lateral border and ocular canthus producing a distinct blunt angle, margins weakly reflexed, anterior margin medially feebly sinuate; surface medially weakly convex, finely and very densely punctate, distance between punctures less than their diameter, with a few coarse punctures immediately behind anterior margin bearing short fine setae; frontoclypeal suture very indistinctly incised and medially weakly curved; smooth area in front of eye approximately 1.5 times as wide as long; ocular canthus short and slender, sparsely punctate, with a fine terminal seta. Frons shiny, with fine, moderately dense punctures, with a few setae beside the eyes. Eyes moderately large, ratio of diameter: interocular width 0.6. Antenna yellow, with 10 antennomeres; club with four antennomeres, club as long as the remaining antennomeres combined, sixth antennomere not transversely produced. Mentum weakly elevated and flattened anteriorly.

Pronotum moderately wide, widest at base, lateral margins in basal half straight and weakly convergent anteriorly, in anterior half moderately curved and more strongly convergent anteriorly towards the strongly produced and sharp anterior angles, posterior angles blunt, anterior margin strongly convexly produced medially, with a broad smooth marginal line, basal margin without marginal line; surface with dense and coarse punctures, without microscopic setae in punctures; anterior and lateral borders setaceous; hypomeron distinctly margined at base but not ventrally produced. Scutellum narrowly triangular, with fine, dense punctures, microscopic setae not present in the punctures.

Elytra moderately long and oval, widest at middle, striae feebly impressed, coarsely and densely punctate, even intervals almost flat, odd ones weakly convex, with coarse and moderately dense punctures concentrated along the striae, punctures with fine microscopic setae, additionally odd intervals with single coarse punctures each bearing a robust white erect seta, interior apical angle of elytra with a strong 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 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 chitinous border, which is one-sixth as long as sternite, last sternite medially half 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: 1.62. Pygidium moderately convex medially, coarsely and densely punctate, without smooth midline, with moderately dense robust light setae.

Legs robust and short; femora dull, with two longitudinal rows of setae, finely and sparsely punctate; metafemur 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 finely serrate, with short setae. Metatibia slender and moderately long, widest at apex, ratio width: length: 1: 3.7, dorsally sharply edged, 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 dense and coarse punctures, glabrous; ventrally edged and serrate, with three strong, not equally distant spines, internal face very sparsely punctate, 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 as long as the following two tarsomeres combined and slightly less than twice as long as the upper tibial spur. Protibia moderately long, bidentate, protarsal claws symmetrical.

Aedeagus shown in Figure 2 View Figure 2 (D–F).

Variation

Length 6.0– 6.3 mm, length of elytra 3.7–3.9 mm, width 3.3 mm. Coloration variable, in some specimens uniformly dark brown. Female: antennal club with three antennomeres

and a little shorter than the remaining antennomeres combined, pygidium almost flat.

Diagnosis

Gynaecoserica compacta sp. nov. is externally similar to the species of Leuroserica as well as to G. barclayi sp. nov. by the habitus and the shiny dorsal surface. On the base of these characters it may be differentiated from all other known Gynaecoserica species. However, the large flattened lateral process on the left-side preapical phallobase common to all Leuroserica species is absent. It differs from G. barclayi by the monochrome elytra being reddish brown or blackish.

Etymology

Name derived from the Latin word compactus, stout, with reference to the stout body shape.