Gynaecoserica lomsakensis, 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 : 1557-1559

publication ID	https://doi.org/ 10.1080/00222930902968809
persistent identifier	https://treatment.plazi.org/id/0399C459-DB1E-6F6F-FE46-FA5D58C10A96
treatment provided by	Felipe
scientific name	Gynaecoserica lomsakensis
status	sp. nov.

Treatment

Gynaecoserica lomsakensis sp. nov.

( Figures 3P–R View Figure 3 , 7F View Figure 7 , 9A View Figure 9 )

Type material examined

Holotype. Ƌ “Thai 17–19.V.1993 Lom Sak - Dan Sai Pacholatko & Dembicky leg./ TS 131/ 64 Sericini Asia spec.” ( TICB) . Paratypes. 88 ƋƋ, 89 ♀♀ same data as

holotype ( TICB, CA), 9 ƋƋ, 12 ♀♀ “ Thai 11–15. V .1993 NAN-PHA-KHAB Pacholatko & Dembicky leg.” ( TICB, CA), 38 ƋƋ, 34 ♀♀ “ THAI , NE, Loei prov. , 6.–9.iv.1999; Phu Rua N.P., 1100 m; 17°30¢N, 101°21¢E; M. Riha leg.” ( TICB, CA), 256 ƋƋ, 135 ♀♀ “ THAI , NE, Loei prov. , 6.–9.iv.1999; Phu Rua N.P., 1100 m; 17°30¢N, 101°21¢E; D. Hauck leg.” ( BNMH, CA, TICB) .

Description

Length 4.4 mm, length of elytra 2.7 mm, width 2.4 mm. Body oval, surface uniformly yellowish brown, abdomen inclusive pygidium blackish, dorsal surface except head dull and almost glabrous.

Labroclypeus almost semicircular, distinctly wider than long, widest at base, lateral margins strongly curved and strongly convergent to moderately rounded anterior angles, lateral border and ocular canthus producing a blunt angle, margins weakly reflexed, anterior margin shallowly sinuate medially; surface almost flat and moderately shiny, finely and densely punctate, distance between punctures equal their diameter, with a few coarse punctures behind anterior margin each bearing a long, erect seta; frontoclypeal suture 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, smooth, without a fine terminal seta. Frons moderately shiny, only posteriorly dull, with fine, moderately dense punctures, glabrous. Eyes small, ratio of diameter: interocular width 0.52. Antenna yellow, with 10 antennomeres; club with five antennomeres, club as long as the remaining antennomeres combined, first antennomere of club only half as long as the club, fifth antennomere not transversely lamella-like. Mentum weakly elevated and flattened anteriorly.

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

Elytra short and oval, widest at middle, striae distinctly impressed, finely and densely punctate, intervals moderately convex, with very fine and moderately dense punctures concentrated along the striae, punctures with fine microscopic setae, first and third interval with a few single coarse punctures bearing a short robust white 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 sclerotized bor- der, which is one-sixth as long as sternite, last sternite medially a little shorter than the penultimate one. Mesosternum between mesocoxae as wide as mesofemur, with irregularly scattered very strong setae. Ratio of length of metepisternum: metacoxa 1: 1.68. Pygidium moderately convex medially, finely and moderately densely punctate, without smooth midline, with microscopic setae or moderately dense robust light setae in the punctures.

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 broad and short, medially convexly widened, widest at middle, ratio width: length: 1: 2.78, dorsally longitudinally convex, 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 four strong, equally distant spines, internal face not punctate and smooth, 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 distinctly shorter than the following two tarsomeres combined and slightly less than twice as long as the upper tibial spur. Protibia short, bidentate, protarsal claws symmetrical.

Aedeagus shown in Figure 3 View Figure 3 (P–R).

Diagnosis

Gynaecoserica lomsakensis sp. nov. is externally similar to G. nahangensis sp. nov. It may be differentiated from G. nahangensis by the semicircular shape of the labroclypeus, the narrower parameres, the shorter antennal club with only five antennomeres, and the shape of the apophysis of the phallobase.

Etymology

Named according to the village of Lom Sak, close to the type locality.