Oides quadriguttata Duvivier

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) : 94-97

Oides quadriguttata Duvivier

( Figs 59A–59D , 60 )

Oides quadriguttata Duvivier, 1884c: 139 ( Philippines: Luzon); Weise, 1924: 5 (catalogue); Wilcox, 1971: 14 (catalogue); Vachon, 1980b: 203 (diagnosis); Kimoto, 1990: 221 (catalogue).

Oides sternalis Weise, 1913: 221 ( Philippines: Luzon); Weise, 1924: 6 (catalogue); Wilcox, 1971: 15 (catalogue); Kimoto, 1990: 221 (catalogue). New synonymy

Types. Oides quadriguttata . Holotype ♀ (IRSB, by monotypy), labeled: “ ♀ [p, w] // Luzon / Semper [p, w] // Coll. Chapuis [p, w] [both labels glued on the following label] // Coll. R. I. Sc. N. B. / Philippines [p, y] // Adorium / 4- guttatum / Luzon Chp. [h, w] [glued on the following label] // A. Duvivier det. [p] 1884 [h, w] // TYPE [p, pink label] // cf. Ann. Soc. Ent. Belg. / C. R. p. CXXXIX, 28, 1884. [h, w] // V. Laboissière vid, 1939: [p] / Oides / quadriguttata / Type Duv [h, w] // A. VACHON—[p] vidit V-1976. [h, w]”.

Oides sternalis . Holotype ♂ (MNHUB, by monotypy), labeled: “Luzon / Worcester [h, w] // Collected by / D. C. Worcester [p, w] // Acc. No. [p] 11825 [h] / Lot / Bu. Of Sci., P.I. [p, w] // Oides / sternalis m [h, w] // ex Coll. / J. Weise [p, w] // Type [p, r] // HOLOTYPUS / Oides / sternalis Weise, 1913 / labelled by MNHUB 2016 [p, r]”.

Redescription. Length 8.9–9.4 mm, width 5.5–6.2 mm. General color ( Figs 59A–59D ) yellow; antennomeres IX–XI and metasternum black; two pairs of black lateral spots at basal and apical 1/3 of elytra, respectively. Antennae filiform in males ( Fig. 60A ), antennomeres IV longest, III–X elongate, length ratios of antennomeres I– XI 1.0: 0.7: 1.2: 1.4: 1.3: 1.2: 1.2: 1.0: 1.0: 0.8: 1.1, length to width ratios of antennomeres I–XI 2.5: 2.2: 3.5: 4.7: 4.5: 4.2: 4.3: 3.6: 3.8: 3.4: 4.8; longer in female ( Fig. 60B ), length ratios of antennomeres I–XI 1.0: 0.6: 1.3: 1.3: 1.3: 1.2: 1.2: 1.0: 1.0: 0.9: 1.1, length to width ratios of antennomeres I–XI 2.6: 2.3: 4.9: 5.0: 5.1: 4.8: 4.3: 4.3: 4.0: 3.6: 5.1. Pronotum transverse, 2.1x wider than long, disc slightly convex, with reticulate microsculpture and sparse, fine punctures, punctures reduced medially, baso- and apico-lateral angles rectangular, apical margin slightly concave. Elytra oblong, widest at middle, 1.3–1.4x longer than wide, disc with reticulate microsculpture and dense punctures; moderately convex, epipleurae near lateral margins, located 9/10 distance between suture and lateral margins. Penis ( Figs 60C–60E ) elongate and comparatively wide; 5.0x longer than wide, parallel-sided, apically tapering from apical 1/5, bifurcate at apical 1/10, lateral apices connected; tectum reduced; slightly curved near base in lateral view, apices widely rounded; ventral surface with shallow and narrow notch at apex, inside apex membranous; endophallic sac without sclerites. Apical margin of abdominal ventrite V in female truncate. Gonocoxae reduced. Ventrite VIII ( Fig. 60F ) transverse and well sclerotized; apical margin rounded, depressed medially, with several long setae along apical margin; one median longitudinal internal ridge from apical 1/7 to base 1/3; spiculum long and wide. Receptacle of spermatheca ( Fig. 60G ) as wide as pump, connected to pump, basally narrowed; pump strongly curved; proximal spermathecal duct extremely elongate.

Variation. Some specimens possess reduced posterior spots on the elytra and those were described as O. sternalis ( Figs 59B–59D ).

Diagnosis. Members of this species are similar to Oides flava (Olivier) but differ in possessing one or two pairs of small black spots near the lateral margins of the elytra, and more slender antennae. In males, the aedeagi of O. quadriguttata differ from those of O. flava in lacking a tectum (possessing elongate and apically bifurcate tectum in O. flava ) and wider lateral processes (slender lateral processes in O. flava ).

Other specimens examined. PHILIPPINES. Luzon: 2♂♂ ( MNHUB), Balbalan, I.1917, leg. J. Dactiha; 1♂, 1♀ ( MNHUB), same but with “ III.1918 ”.

Distribution. Philippines.

Figures

FIGURE 59. Habitus of Oides quadriguttata Duvivier and O. vexilla Duvivier.59A. O. quadriguttata, holotype, dorsal view; 59B. Colora variation (O. sternalis), dorsal view; 59C. Same, ventral view; 59D. Same, lateral view; 59E. O. vexilla, dorsal view; 59F.Same, ventral view; 59G. Same, lateral view.

FIGURE 60. Diagnostic characters of Oides quadriguttata Duvivier. 60A. Antenna, male; 60B. Antenna, female; 60C. Penis, dorsal view; 60D. Penis, lateral view; 60E. Penis, ventral view; 60F. Abdominalventrite VIII; 60G.Spermatheca.