Oides boreri, Lee & Beenen, 2017

Lee, Chi-Feng & Beenen, Ron, 2017, Revision of the Palaearctic and Oriental species of the genus Oides Weber, 1801 (Coleoptera: Chrysomelidae: Galerucinae), Zootaxa 4346 (1) : 20-23

Oides boreri sp. nov.

( Figs 12A–12C , 13 )

Oides laticlava: Samoderzhenkov, 1992: 108 ( Vietnam) . Misidentification

Types. Holotype ♂ (NHMB): “LAOS-NE, Houa Pan prov., / 20°12–13.5’N 103°59.5’–104°01E, / Ban Saluei→Phou Pane Mt., / 1340–1870m, 10.v.–16.vi.2009, M. Brancucci & local coll. leg. [p, w] // NHMB Basel, NMPC Prague / Laos 2009 Expedition: / M. Brancucci, M. Geiser, / Z. Kraus, D. Hauck, V. Kubáň [p, w]”. Paratypes. LAOS. 3♂♂ (NHMB), same data as holotype; 4 exs. (NHMB): “LAOS-NE, Houa Pan prov., / ~ 20°13’N 104°00’E, / PHOU PANE Mt., / 1.–16.vi.2009, 1350– 1500 m, / M. Brancucci leg. [p, w] // NHMB Basel, NMPC Prague / Laos 2009 Expedition: / M. Brancucci, M. Geiser, / Z. Kraus, D. Hauck, V. Kubáň [p, w]”; 1♂, 1♀ (TCHU): “Nong Het 1200–1400m / Xieng Khuang Prov. / III–IV. 2006 / Native Collector”;

Description. Length 12.3–12.8 mm, width 10.6–11.0 mm. General color ( Figs 12A–12C ) yellow; antennae yellow, but antennomeres V–XI black; meso- and metathoracic, and abdominal ventrites black; legs yellow but tarsi black. Antennae filiform in males ( Fig. 13A ), antennomeres IV longest, IV and V slightly serrate, VI–XI elongate, length ratios of antennomeres I–XI 1.0: 0.5: 0.9: 1.0: 0.9: 0.9: 0.9: 0.8: 0.8: 0.7: 0.9, length to width ratios of antennomeres I–XI 2.9: 2.0: 3.5: 4.2: 3.6: 3.0: 2.7: 2.6: 2.7: 2.7: 3.8; similar in females ( Fig. 13B ), length ratios of antennomeres I–XI 1.0: 0.5: 1.0: 1.2: 0.9: 0.9: 0.8: 0.8: 0.8: 0.7: 0.8, length to width ratios of antennomeres I–XI 2.9: 2.0: 4.0: 4.6: 3.4: 3.2: 3.0: 3.3: 3.0: 2.8: 3.6. Pronotum extremely transverse, 2.5x wider than long, disc convex, with lateral depressions, sides flattened, without reticulate microsculpture but with sparse, coarse punctures; baso-lateral angles rounded, apico-lateral angles narrowly rounded; lateral margin rounded; apical margin slightly concave. Elytra oval, widest at middle, as long as wide, disc without reticulate microsculpture but with dense punctures reduced; extremely convex, epipleurae located at 3/5 distance between suture and lateral margins; humeral calli visible, surrounded by curved depression. Penis ( Figs 13C–13E ) extremely elongate, 9.7x longer than wide; parallel-sided; apex of dorsal surface deeply bifurcate at apical 1/5, apices narrowly rounded; tectum reduced, small and rounded; slightly curved in lateral view, apex of dorsal surface rounded with an angular process; ventral surface with extremely deep and subapically broadened notch from apex to basal 1/3; endophallic sclerite complex comprising one apical, square sclerite, with erect process near middle of apical margin; triangular in lateral view. Apical margin of abdominal ventrite V in females concave. Gonocoxae reduced. Ventrite VIII ( Fig. 13F ) longitudinal, medial area of apical margin projecting anterior, well sclerotized, depressed at middle, with dense, long setae along apical margin; spiculum elongate. Receptacle of spermatheca ( Fig. 13G ) as wide as pump, connected to pump, basally narrowed; pump strongly curved; proximal spermathecal duct long and broadened apically.

Diagnosis. Adults of this new species and those of O. epipleuralis , O. coccinelloides , and O. laticlava are easily recognized by the strongly convex elytra (epipleurae located at 3/5 distance between suture and lateral margins), but adults of O. boreri sp. nov. differ in possessing entirely yellow elytra (with several pairs of small black spots in O. coccinelloides ; one pair of longitudinal black stripes in O. laticlava ), and black venter (entirely yellow venter in O. epipleuralis and O. laticlava ; black metasternum, and one pair of black spots at sides of each abdominal ventrite in O. coccinelloides ), and black tarsi (yellowish brown tarsi in others). Some specimens of O. epipleuralis with darker abdomens may be confused with O. boreri sp. nov., but their aedeagi differ in morphological details. The aedeagi of O. boreri sp. nov. differ from others in the more elongate penis, 9.7x longer than wide (less elongate in others, less than 8.0x longer than wide), extremely deep notch at ventral surface (moderately deep notch in O. coccinelloides ; shallow notch in O. epipleuralis and O. laticlava ). Moreover, the species are allopatric: O. boreri is restricted to Laos, O. coccinelloides is restricted to west China, India, and Myanmar, O. epipleuralis is endemic to Taiwan, and O. laticlava is restricted to other parts of China ( Fig. 14 ).

Remarks. Specimens of Vietnam identified as Oides laticlava by Samoderzhenkov (1992) probably refer to this new species.

Etymology. This new species is dedicated to Matthias Borer (Curator, NHMB), who encouraged the first author to focus his research on leaf beetles.

Distribution. Laos ( Fig. 14 ).

Figures

FIGURE 12. Habitus of Oides boreri Lee & Beenen, sp. nov. and O. epipleuralis Laboissière. 12A. O. boreri dorsal view; 12B. Same, ventral view; 12C. Same, lateral view; 12D. O. epipleuralis, dorsal view; 12E. Same, ventral view; 12F. Same, lateral view.

FIGURE 13. Diagnostic characters of Oides boreri Lee & Beenen, sp. nov. 13A. Antenna, male; 13B. Antenna, female; 13C. Penis, dorsal view; 13D.Penis, lateral view; 13E.Penis, ventral view; 13F. Abdominal ventrite VIII; 13G. Spermatheca.

FIGURE 14. Distribution map of Oides boreri (yellow dots), O. coccinelloides (blue dots), O. epipleuralis (pink dots), and O. laticlava (red dots).