Oides geiseri, 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) : 61-62

Oides geiseri sp. nov.

( Figs 39 )

Types. Holotype ♂ (NHMB): “ NEPAL: Kosi - #11 / Num 27°33’N / / 87°17’E, 1550m, / 8/ 11.vi.01 [p, w] // NHMB Basel / expedition to / Nepal, 2001 [p, w]”. Paratypes. “ INDIA. 1♂ (BMNH): “Khasi Hills. / Assam. / 1000–3000 ft. [p, blue label] // 1373 [h, blue label] // Andrewes / Bequest. / B.M. 1922-221. [p, w] // Oides thibetana (sic!) Jacoby / 1900 [h] / A. VACHON—det. [p] IV.1976 [h, w]”; 1♂ (MNHUB): “Kohima / Assam / Duthon [h, w] // ex. coll. / J. Weise [p, w]”; 1♀ (KMNH): “Darjeeling Distr. / India, Bhakta B. [p, w] // {BM; Comp. Id.} / Oides / maculata / (Olivier) [h] / Det. S. Kimoto, 19 [p] 80 [h, w] // {BM; Comp. Id.} / Oides / maculata Oliv. / Det. S. Kimoto, 19 [p, w]”; 1♂ (BMNH): “Lord Carmichael’s / Collection / Darjeeling dist. / Ghumti / 4000 ft / July 1912. [p, w] // Pres by / Comm Inst Ent / B.M. 1989-1 [p, w]”; 1♂: “Mungphu [p, w] // Oides / maculata Ol. / Mus. f. Naturkunde Berlin [p, w]”; 1♂ (BMNH): “Shillong 5000 ft / 27 Aug.—3 Sept. 1928 / Dutt coll [p, w] // Pres. By / Imp. Bur. Ent. / Brit. Mus. / 1927-448. [p, w]”; 2♂♂ (MNHUB): “Himalaya / Sikkim [p, w] // Oides / Indica Baly / wo [h, w] // Oides / maculata Ol. / Mus. f. Naturkunde Berlin [p, w]” 1♂ (MNHUB): “ Sikkim / India [p, w] // Oides / maculata Ol. / Mus. f. Naturkunde Berlin [p, w]”; MYANMAR. 1♂ (NMPC): “TENASSERIM, Birmania / coll. J.V.Helfer / National Museum Prague [p, w]”; NEPAL. 1♀ (SMNS): “614 NEPAL: Dolakha Distr. / Khare Khola / 1900– 1200m, 3.VI.2000 / leg. W. SCHAWALLER [p, w] // Oides / maculata Ol. [h] / L. Medvedev det. [p, w]”; 1♂ (KMNH): “Godavari 1500– / 1700m [p] 21.5. [h, w] // Nepal, 1977 / Wittmer, Brancucci [p, w] // Oides / maculata / (Olivier) [p] / det. S. Kimoto, 19 [p] 81 [h, w]”; 1♂ (NMW): “ NEPAL, Kathmandu Vall. / Godavai, 25.–26.5. / 1500–1700m, 1998 / leg. Lebisch & Probst [p, w]”; 1 ex. (NMW): “E-NEPAL: Arun Val. / Mongmaya-Sultiburi / 400–500m, 2.6.88 / leg. Lebisch & Probst [p, w]”; 2 exs. (NME): “ NEPAL, Janakpur / Dolakha, Tama Koshi / valley, Gonga Khola / to Suri Doban, 1300– / 1000mNN, 04.VI.2000 / leg. J. Schmit [p, w] // Oides Hope / scutellata [h] // L. Medvedev det. [p, w]”; 1 ex. (NME): “ NEPAL Tama Koshi / vall. Below Dolakha / 900–1000m, 5.6.0 0 / leg. J. Schmit [p, w] // Oides / scutellata Hope / L. Medvedev det. [p, w]”.

Description. Length 11.9–13.3 mm, width 9.7–10.6 mm. General color yellow; antennomeres IX–XI, meso- and metathoracic, and abdominal ventrites black except medial longitudinal area. Antennae filiform in males ( Fig. 39A ), antennomeres III longest, III–VI slightly serrate, VII–XI elongate, length ratios of antennomeres I–XI 1.0: 0.5: 1.2: 1.1: 1.0: 1.0: 1.0: 0.9: 0.8: 0.7: 0.9, length to width ratios of antennomeres I–XI 2.6: 1.8: 3.7: 3.4: 3.2: 3.1: 3.4: 2.8: 2.5: 2.4: 3.2; shorter in female ( Fig. 39B ), length ratios of antennomeres I–XI 1.0: 0.6: 1.0: 1.1: 0.9: 0.9: 1.0: 0.8: 0.8: 0.7: 0.8, length to width ratios of antennomeres I–XI 2.5: 1.8: 3.3: 3.3: 3.4: 3.0: 3.0: 2.4: 2.2: 2.1: 2.8. Pronotum transverse, 2.2x wider than long, disc convex and with lateral longitudinal depressions, sides flattened, with reticulate microsculpture and sparse, fine punctures, baso-lateral angles rounded, apico-lateral angles rectangular, apical margin moderately concave. Elytra oval, widest near base, 1.1x longer than wide; disc without reticulate microsculpture but with dense, fine punctures; moderately convex, epipleurae located 7/10 distance between suture and lateral margins. Penis ( Figs 39C–39F ) elongate, 8.2x longer than wide; parallelsided, widest at apical 1/6; apically bifurcate, apices approximate; tectum small but transverse, apex truncate; slightly curved in lateral view, apex narrowly rounded; ventral surface with extremely deep, narrow but subapically broadened notch from apex to base; endophallic sclerite complex comprising one pair of lateral sclerites, well developed and horn-like, base connected with dorsal surface of penis. Apical margin of abdominal ventrite V in female truncate or slightly rounded. Gonocoxae reduced. Ventrite VIII ( Fig. 39G ) transverse, medial area projecting anteriorly, apical margin depressed at middle, with dense, long setae along apical margin, spiculum short and broad. Receptacle of spermatheca ( Fig. 39H ) as wide as pump, connected to pump, basally narrowed; pump strongly curved; proximal spermathecal duct short and widened near apex.

Diagnosis. This new species belongs to the O. tarsata species group which contains O. geiseri sp. nov., O. tarsata (Baly) , O. thibettana Jacoby , O. tibiella Wilcox , and O. ustulaticia Laboissière. Adults of this group are characterized by the yellow elytra, epipleurae located 7/10 to 3/4 of the distance between suture and lateral margins, and elongate antennae with antennomeres VIII–X more than 2.0x longer than wide. Members of the species group cannot be distinguished externally, only by gentalic characters. However, they are largely allopatric. Oides geiseri sp. nov. occurs in India and Myanmar, O. tarsata in most regions of China, O. thibettana in Tibet, Sichuan ( China), and Myanmar, O. tibiella in Laos, Thailand, and Vietnam, O. ustulaticia in Yunnan and Guizhou ( China). The distribution of O. thibettana and O. geiseri in Myanmar requires further investigation. They also can be identified by the combination of the following characters of the penis: widened at apical 1/6 ( O. geiseri , O. tarsata , and O. thibettana ) or parallel-sided ( O. tibiella and O. ustulaticia ), endophallic sclerites laterally flattened ( O. tarsata ), dorso-ventrally flattened ( O. tibiella and O. ustulaticia ), or well developed ( O. geiseri and O. thibettana ); strongly curved near base ( O. ustulaticia ) or weakly curved (others). Morphology of the genitalic endophallic sclerites of O. geiseri and O. thibettana are very different when the internal sac is not everted. The endophallic sclerites of O. thibettana are kidney-shaped and triangular in O. geiseri .

Etymology. This new species is dedicated to Michael Geiser (Curator, BMNH), who assisted this study in various ways.

Distribution. India, Nepal, Myanmar ( Fig. 40 ).

Figures

FIGURE 39. Diagnostic characters of Oides geiseri Lee & Beenen sp. nov. 39A.Antenna, male; 39B. Antenna, female; 39C. Penis, dorsal view; 39D. Penis, lateral view; 39E. Penis, ventral view; 39F. Apex of penis, before internal sac pulled out; 39G. Abdominal ventrite VIII; 39H. Spermatheca.

FIGURE 40. Distribution map of Oides geiseri (pink dots), and O. tarsata (red dots), O. thibettana (orange dots), O. tibiella (blue dots), and O. ustulaticia (green dots).