Gynaecoserica gisionensis, Ahrens & Fabrizi, 2009
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publication ID |
https://doi.org/ 10.1080/00222930902968809 |
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persistent identifier |
https://treatment.plazi.org/id/0399C459-DB03-6F72-FE1A-FBA859B10F8E |
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treatment provided by |
Felipe |
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scientific name |
Gynaecoserica gisionensis |
| status |
sp. nov. |
Gynaecoserica gisionensis sp. nov.
( Figures 2S–U View Figure 2 , 7C View Figure 7 , 9B View Figure 9 )
Type material examined
Holotype. Ƌ “ Laos: Vientiane Prov., Gi Sion Vill., de Thang Ngone 2.I.1966 / Native Collector Bishop Museum / 539 Sericini Asia spec.” ( BPBM).
Description
Length 3.5 mm, length of elytra 2.5 mm, width 2.3 mm. Body oval, surface reddish brown, dorsal surface shiny and almost glabrous.
Labroclypeus distinctly wider than long, widest at base, lateral margins strongly curved and convergent to moderately rounded anterior angles, lateral border and ocular canthus producing a distinct blunt angle, margins weakly reflexed, anterior margin shallowly sinuate medially; surface weakly convex and shiny, finely and densely punctate, distance between punctures less than 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 1.5 times as wide as long; ocular canthus short and slender, smooth, only laterally sparsely punctate, with a fine terminal seta. Frons shiny, posteriorly not dull, with fine, dense punctures, glabrous except a few short setae beside eyes and behind frontoclypeal suture. Eyes moderately large, ratio of diameter: interocular width 0.6. Antenna yellow, with 10 antennomeres; club with five antennomeres, club as long as the remaining antennomeres combined, fourth antennomere transversely produced, lamella-like, one-fifth as long as the club. Mentum very weakly elevated and flattened anteriorly.
Pronotum moderately wide, widest at base, lateral margins in basal half straight 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 moderately convexly produced medially, with a distinct fine marginal line, basal margin without marginal line; surface with dense and moderately coarse punctures, glabrous; anterior and lateral borders sparsely setaceous; hypomeron distinctly margined at base but not ventrally produced. Scutellum long and triangular, with fine, dense punctures, medially widely smooth, microscopic setae not present in the punctures.
Elytra short and oval, widest at middle, striae weakly impressed vanishing on posterior portion of elytra, coarsely and densely punctate, intervals flat, with sparse, fine, evenly scattered punctures, glabrous, each puncture bears a minute seta, interior apical angle of elytra with a strong seta; epipleural edge fine ending at the weakly curved external apical angle of elytra, epipleura sparsely 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: 1.54. Pygidium moderately convex medially, coarsely and densely punctate, shiny, with a narrow smooth midline, at apex with a few fine long light setae.
Legs robust and short; femora dull, with two longitudinal rows of setae, finely and sparsely punctate; metafemur shiny and sparsely punctate, sharply margined anteriorly and without a submarginal serrate line, posterior margin weakly convex and glabrous, only weakly widened externally in apical half and not serrate, internally finely serrate, with short setae. Metatibia broad and short, medially convexly widened, widest at middle, ratio width: length 1: 3.2, dorsally weakly 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 very sparse and very fine punctures, glabrous; ventrally edged and serrate, with three strong, equally distant spines, internal face finely 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 one-third longer than the upper tibial spur. Protibia very short, bidentate, protarsal claws symmetrical.
Aedeagus shown in Figure 2 View Figure 2 (S–U).
Female unknown.
Diagnosis
Gynaecoserica gisionensis sp. nov. differs from all other Gynaecoserica species by the glabrous and shiny dorsal surface as well as by the thin lateral apophysis of the phallobase, which is hook-like and curved dorsally.
Etymology
Named according to the type locality Gi Sion.
| BPBM |
Bishop Museum |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.