Gynaecoserica alma, 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 : 1511-1522

publication ID	https://doi.org/ 10.1080/00222930902968809
persistent identifier	https://treatment.plazi.org/id/0399C459-DB2C-6F4A-FDBD-FC0859C40DAE
treatment provided by	Felipe
scientific name	Gynaecoserica alma
status	sp. nov.

Treatment

Gynaecoserica alma sp. nov.

( Figures 1A–C View Figure 1 , 6A View Figure 6 , 10A View Figure 10 )

Type material examined

Holotype. Ƌ “China-Yunnan 14.–21.6. 100 km W Baoshan , 1993 Gaoligongshan Nat. Res. E. Jendek & O. Šauša ” ( TICB) . Paratypes. 2 ♀♀ same data as holotype ( TICB, CA) .

Description

Length 5.8 mm, length of elytra 3.8 mm, width 3.1 mm. Body oblong, dorsal surface dark brown, antenna yellowish brown, dorsal surface dull, very sparsely setose.

Labroclypeus subrectangular, widest at base, lateral margins subparallel, anterior angles strongly rounded, lateral border and ocular canthus producing a distinct blunt angle, margins weakly reflexed, anterior margin very 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 anterior margin bearing long, erect setae; frontoclypeal suture feebly incised and slightly elevated, medially moderately curved; smooth area in front of eye approximately as wide as long; ocular canthus short and moderately slender, finely and densely punctate, without terminal seta. Frons shiny, only posteriorly dull, with fine, dense punctures, glabrous. Eyes moderately large, ratio of diameter: interocular width 0.52. Antenna yellow, with 10 antennomeres; club dark, with five antennomeres, 1.5 times as long as the remaining antennomeres combined. Mentum weakly elevated and flattened anteriorly.

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

Elytra moderately long, widest in apical third, striae feebly impressed and finely and densely punctate, intervals almost flat, with fine, sparsely scattered punctures concentrated along the striae, punctures with a few long fine white setae, interior apical angle of elytra without strong seta; epipleural edge fine ending at the strongly 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 with a few strong adjacent setae laterally only; 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 border, which is one sixth as long as sternite, last sternite medially almost as long as penultimate one. Mesosternum between mesocoxae as wide as mesofemur, with irregularly scattered very strong setae. Ratio of length of metepisternum: metacoxa 1: 1.4. Pygidium strongly convex at apex, coarsely and moderately densely punctate, with moderately broad smooth midline, surface dull, with a few long setae.

Legs slender and moderately long; femora dull, with two longitudinal rows of setae, finely and sparsely punctate; metafemur dull, 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 very finely serrate, with a few long setae. Metatibia slender and moderately long; uniformly widened toward apex, ratio width: length: 1: 3.4, dorsally longitudinally convex, only at apex indistinctly edged; with two groups of spines, basal group at one-third, apical group at three-quarters of metatibial length; basally with a few single, fine spines in the punctures; external face longitudinally convex, with sparse, fine punctures, glabrous; ventrally edged and serrate, with three strong equidistant spines, internal face finely sparsely 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 little shorter than the following two tarsomeres combined and twice as long as the upper tibial spur. Protibia moderately long, bidentate, protarsal claws lacking in holotype.

Aedeagus shown in Figure 1 View Figure 1 (A–C).

Diagnosis

Gynaecoserica alma sp. nov. in external shape is very similar to G. lohitensis sp. nov.; it may be differentiated from that species by the antennal club, having only five antennomeres, and by the apically broader aedeagus, of which the phallobase and the parameres (including their basal appendages) are much more strongly curved.

Etymology

Name derived from the Latin adjective, almus, fertile.