Oberea sylvia Pascoe, 1858

Li, Zhu, Cuccodoro, Giulio & Chen, Li, 2017, Some taxonomic notes on the genus Oberea Dejean, 1835 from Asia (Coleoptera, Cerambycidae, Lamiinae), ZooKeys 647, pp. 121-136 : 126-128

Oberea sylvia Pascoe, 1858 rest. stat. Figs 7, 8

Oberea sylvia Pascoe, 1858: 261. Type locality: "China, Borealis".

Redescription

(Fig. 7).Body 12.5-13.5 mm long and 2.3mm wide. Head black except for labrum yellowish brown to reddish brown, maxillary palpus and labial palpus pale yellowish brown; antennae reddish brown, scape dark brown. Prothorax, elytra and ventral surface (except for the abdominal segment V black) ochraceous; legs yellowish brown, apical half of hind tibia and tarsi darker brown. Body clothed with short golden pubescence and some erect hairs on pronotum, base of elytra and ventral surface of the basal antennal segments. Head short, with distinctly depressed vertex; eyes very large, inferior lobes 2 times as long as the gena in male. Antennae of males longer than body, antennomere III longer than pedicel and antennomere IV. Prothorax 1.2 times wider than long, slightly constricted basally and apically; pronotum with a tubercle in middle, finely and densely punctured. Scutellum squared, slightly emarginated. Elytra nearly three times as long as humeral width, and 3.6 times as long as head and prothorax combined, slightly narrowed from behind base to apical quarter, apex truncate; basal disc with large and deep punctures arranged in line, punctures becoming gradually finer and irregular towards apical quarter. Metepisternum and sides of abdominal surface finely punctate. Metafemora reaching posterior edge of abdominal segment I; metatibiae almost twice as long as tarsi. Abdominal sternite V with a shallow triangular concave in males.

Male terminalia. (Fig. 8) Tergite VIII broader than long, apex truncated and slightly emarginated, rounded at sides, densely clothed with long hairs and short setae (Fig. 8a); Tegmen curved and penis curved in profile, parameres mostly covered with long setae on the apical half; base of each lobe in ventral side transversely and obliquely ridged; the ridge with dense fine hairs (Fig. 8 b–e); penis 1.2 times as long as tegmen, dorsal plate slightly longer than ventral plate; the median struts 3/5 times as long as the whole median lobe in length; apex of the ventral plate rounded; median foramen rounded (Fig. 8f); apical endophallus with 2 pairs of baculiform rods, the long pair 2.8 times as long as short pair (Fig. 8g).

Type material examined.

Oberea sylvia Pascoe: Holotype, ♂, N. China (BMNH).

Additional material examined.

China: 1♂, Chine (MHNL); 4♂♂, Chine (BMNH).

Distribution.

East China.

Remarks.

Oberea sylvia was originally described by Pascoe 1858 and regarded as synonym of Oberea nigriceps (White, 1844) (Breuning, 1962). After comparing the types, Oberea sylvia , which distinctly differs from Oberea nigriceps in male genitalia (Fig. 8), is restored to specific rank.

The holotype probably was collected by Robert Fortune. According to his book "Three years wandering in the north provinces of China", the northern province of China included Shanghai, Zhejiang Province and Jiangsu Province; therefore "N. China" or "China borealis" might mean east China. Unfortunately, there is no detailed information about the location of the specimen that the first author examined.