Doryscus niger Medvedev & Sprecher-Uebersax, 1998

Lee, Chi-Feng, 2017, Revision of the genus Doryscus Jacoby (Coleoptera: Chrysomelidae: Galerucinae), Zootaxa 4269 (1), pp. 1-43 : 23-25

Doryscus niger Medvedev & Sprecher-Uebersax, 1998

( Figs 9 F, 12)

Doryscus niger Medvedev & Sprecher-Uebersax, 1998: 34 .

Types (n= 3). Holotype ♂ ( NMHB), labeled: “ Pothana 1900- / Landrung 1600m / 7.V.1984 [p, w] // W-Nepal / C. Holzschuh [p, w] // HOLOTYPUS [p] / Doryscus / niger m. [h] / L.N.Medvedev det.95 [p, r] . Paratypes: 1♂ ( NHMB), labeled: “Landrung- 1600- / Pothana 1900m / 6.VI.1984 [p, w] // W-Nepal / Modi Khola / C. Holzschuh [p, w] // PARATYPUS / L.N.Medvedev det.95 [p, r]” ; 1♀ ( NMHB), labeled: “ Gangjwal / 2500m 6–7.V.89 / M. Brancucci [p, w] // Nepal Bagmati / Sindhupalchok [p, w] // Doryscus / niger / Medvedev [h, w] // PARATYPUS / L.N.Medvedev det.95 [p, r]”.

Redescription. Length 3.7–4.3 mm, width 1.4–1.8 mm. General color black, but mouth parts, antennae, apices of femora, bases of tibiae, and tarsi paler ( Fig. 9 F). Antennomere I slightly swollen in males ( Fig. 12 A), length ratios of antennomeres I–XI 1.0: 0.4: 0.6: 0.6: 0.6: 0.6: 0.7: 0.7: 0.6: 0.6: 0.7, length to width ratios of antennomeres I–XI 3.0: 1.5: 2.5: 2.5: 2.6: 2.6: 2.9: 2.9: 3.0: 2.7: 3.8; antennomere I more slender in females ( Fig. 12 B), length ratios of antennomeres I–XI 1.0: 0.4: 0.6: 0.6: 0.7: 0.7: 0.7: 0.7: 0.6: 0.6: 0.8, length to width ratios of antennomeres I–XI 3.7: 1.8: 2.7: 2.8: 2.9: 2.7: 2.7: 2.8: 2.9: 2.7: 3.6. Elytra 1.8x longer than wide, surface with erect, pale, dense, and elongate setae; and fine punctures. Apical margin of last abdominal ventrites with two shallow incisions in males ( Fig. 12 G); but widely rounded in females ( Fig. 12 H). Penis ( Figs 12 C–12D) slender, 6.1 x longer than wide, gradually narrowed towards apex; apex of dorsal surface with deep notch; apex of ventral surface with shallow notch; almost straight in lateral view, apex with deep notch between dorsal and ventral surface; ventral surface smooth. Endophallic spiculae long, about 0.6 x as long as penis, apex trilobed, median lobe medially swollen, with dense lateral setae subapically, lateral lobes slender; eight pairs basal horn-like spiculae, basal pair longest, apically shortened. Gonocoxae ( Fig. 12 E) extremely slender, 6.2 x longer than wide, sides narrowed at apical 1/10 and 3/10; apices narrowly rounded; inner margins approximate from apex to midpoint, apex with nine setae; extremely slender from half to midpoint but abruptly widened at base. Ventrite VIII ( Fig. 12 F) well sclerotized; spiculum elongate; apex square, apical margin truncate, with dense short setae; disc with several long setae at sides. Receptacle of spermatheca ( Fig. 12 I) moderately swollen, narrowly separated from pump; pump strongly curved but not apically narrowed; proximal spermathecal duct slender, shallowly projecting into receptaculum.

Differential diagnosis. See diagnosis of Doryscus nepalensis sp. nov.

Distribution. Only known from type specimens from Nepal.

Figures

FIGURE 9. Habitus of Doryscus species, dorsal view. 9 A. D. testaceus Jacoby; 9 B. D. testaceus Jacoby, color variation; 9 C. D. nepalensis Lee, sp. nov.; 9 D. D. nepalensis Lee, sp. nov., color variation; 9 E. D. nepalensis Lee, sp. nov., color variation; 9 F. D. niger Medvedev & Sprecher-Uebersax.

FIGURE 12. Diagnostic characters of niger Medvedev & Sprecher-Uebersax. 12 A. Antenna, male; 12 B. Antenna, female; 12 C. Penis, dorsal view; 12 D. Penis, lateral view; 12 E. Gonocoxae; 12 F. Abdominal ventrite VIII. 12 G. Apical margin of abdominal ventrite V, male; 12 H. Apical margin of abdominal ventrite V, female; 12 I. Spermatheca.