Oides quadrivittata Gahan

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) : 97-98

Oides quadrivittata Gahan

( Figs 5D , 61 )

Oides quadrivittata Gahan, 1891: 453 ( Indonesia: Gilolo); Wilcox, 1971: 14 (catalogue).

Types. Lectotype ♂ (BMNH), here designated, labeled: “[aedeagus glued on the card] // Type [p, w, circle label with red border] // Kai. [h, w, circle label] // Baly Coll. [p, w] // Oides / quadrivittata / Type Gahan [h, w] // SYN- / TYPE [p, w, circle label with blue border] // vidit III-1975. [h] / A. VACHON—det. [p, w]”. Paralectotype. 1♀ (BMNH): “Gil [h, w, circle label] // Baly Coll. [p, w] // SYN- / TYPE [p, w, circle label with blue border]”.

Type locality. Both types were collected from Gilolo island by Wallace ( Gahan 1891). This island is called Halmahera at present.

Redescription. Length 7.4–7.9 mm, width 4.5–4.7 mm. General color ( Fig. 5D ) yellow except antennomeres III–XI and metasternum darker; two pairs of longitudinal, wide, black stripes on elytra, one pair near scutellum from near base to apical 1/3, the other pair near lateral margin from base to suture, two pairs not apically connected. Antennae filiform in males ( Fig. 61A ), antennomeres IV longest, IV–XI elongate, length ratios of antennomeres I– X (XI lost) 1.0: 0.6: 0.8: 1.2: 1.1: 1.0: 1.0: 0.8: 0.8: 0.7, length to width ratios of antennomeres I–X 3.6: 2.2: 2.9: 4.4: 4.6: 4.4: 4.4: 4.0: 4.1: 3.6; shorter in female ( Fig. 61B ), length ratios of antennomeres I–X (XI lost) 1.0: 0.6: 0.7: 1.0: 1.0: 1.0: 1.0: 0.8: 0.7: 0.6, length to width ratios of antennomeres I–X 3.3: 2.1: 2.7: 3.8: 3.8: 3.8: 3.8: 3.4: 2.9: 2.7. Pronotum transverse, 2.3x wider than long, disc convex, with reticulate microsculpture and fine punctures, baso-lateral angles broadly rounded, apico-lateral angles rectanguar, lateral margins rounded, apical margin moderately concave. Elytra elongate oval, parallel-sided, 1.4x longer than wide, disc with reticulate microsculpture and with dense, fine punctures; slightly convex, epipleurae located 2/3 distance between suture and lateral margins; humeral calli visible, with adjacent curved depressions. Penis elongate, 9.4 longer than wide; parallel-sided; apically bifurcate at apical 1/5, apico-lateral apices well separated; tectum elongate, apically narrowed; slightly curved near base in lateral view, apices angular; ventral surface with deep and basally narrowed notch from apex to apical 1/3; endophallic sac without sclerites. Apical margin of abdominal ventrite V in female subtruncate. Gonocoxae reduced. Ventrite VIII ( Fig. 61F ) transverse and well sclerotized, apical margin rounded, depressed medially, with short setae along apical margin, medially denser; spiculum long and slender. Receptacle of spermatheca ( Fig. 61G ) as wide as pump, connected to pump; pump strongly curved; proximal spermathecal duct long with with sparse teeth at apical area.

Diagnosis. This species is similar to Oides fryi (Clark, 1864) from Australis, but the latter has the black stripes on the elytra apically connected ( Fig. 5 E ), whereas they are separate in O. quadrivittata ( Fig. 5D ). In addition in O. fryi the penis is wider.

Distribution. Indonesia: Halmahera ( Fig. 7 ).

Figures

FIGURE 7. Distribution map of Oides antennata (pink dots), O. apicalis (red dots), O. cyanella (green dots), O. femoralis (blue dots), and O. quadrivittata (yellow dots).

FIGURE 61. Diagnostic characters of Oides quadrivittata Gahan. 61A. Antenna, male; 61B. Antenna, female; 61C. Penis, dorsal view; 61D. Penis, lateral view; 61E. Penis, ventral view; 61F. Abdominalventrite VIII; 61G.Spermatheca.

FIGURE5. Habitusof Oides species.5A.O. antennata Duvivier, dorsal view;5B.Same,ventral view;5C.Same,lateral view; 5D.O. quadrivittata Gahan (lectotype), dorsal view; 5E. O. fryi (Clark), dorsal view.