Oides cyanella Jacoby

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) : 32

Oides cyanella Jacoby

( Figs 8G– 8I , 21 )

Oides cyanella Jacoby, 1886: 43 ( Indonesia: Ternate island); Weise, 1924: 3 (catalogue); Laboissière, 1932: 151 (diagnosis); Wilcox, 1971: 7 (catalogue); Kimoto, 1990: 218 (catalogue).

Types. Holotype ♀ ( MCSN, by monotypy), labeled: “ Ternate / X / Beccari 1875 [p, w] // Sp. n. [h, w] // Typus [p, w, red letters] // cyanella / Jac. [p, w] // Oides / cyanella Jac. [h, g]”.

Redescription. Length 10.1–12.4 mm, width 5.1–6.7 mm. General color ( Figs 8G– 8I ) yellow; antennae blackish but three basal antennomeres yellowish brown; elytra metallic blue, with narrow, yellow lateral margin. Antennae filiform in males ( Fig. 21A ), antennomeres IV longest, III–XI slender, VII apically broadened, length ratios of antennomeres I–XI 1.0: 0.6: 1.0: 1.3: 1.2: 1.1: 1.2: 1.0: 1.0: 0.9: 1.0, length to width ratios of antennomeres I–XI 2.9: 2.2: 3.3: 4.2: 3.5: 3.4: 3.1: 3.1: 2.9: 2.7: 3.4; similar in females ( Fig. 21B ), length ratios of antennomeres I–XI 1.0: 0.6: 0.9: 1.2: 1.1: 1.0: 1.1: 0.9: 0.9: 0.8: 0.9, length to width ratios of antennomeres I–XI 3.2: 2.3: 3.4: 4.5: 4.1: 3.6: 3.3: 3.1: 3.1: 2.9: 3.8. Pronotum transverse, 2.4 wider than long, disc convex, lateral margins flattened, with reticulate microsculpture and dense, coarse punctures; baso- and apico-lateral angles broadly rounded; lateral margin rounded; apical margin slightly concave. Elytra elongate oval, parallel-sided, 1.5x longer than wide; disc with reticulate microsculpture and dense, coarse punctures, slightly convex, epipleurae near lateral margins, located 9/10 distance between suture and lateral margins, wide from base to basal 1/5, apically narrowed and abbreviated at middle; humeral calli prominent. Penis ( Figs 21C–21E ) slender, 8.0x longer than wide; widest at apical 1/4, parallel-sided, apex of dorsal surface bifurcate at apical 1/4; tectum elongate, apically broadened, apex truncate; slightly curved in lateral view, apex narrowly hooked; ventral surface with extremely deep and basally narrowed notch from apex to basal 1/5; endophallic sclerite complex comprising one pair of elongate, basally and apically tapering sclerites. Apical margin of abdominal ventrite V in female truncate. Gonocoxae reduced. Ventrite VIII ( Fig. 21G ) transverse, apical margin broadly rounded and weakly depressed at middle, with extremely long setae along apical margin, spiculum reduced. Receptacle of spermatheca ( Fig. 21H ) as wide as pump, connected to pump; pump strongly curved; proximal spermathecal duct membranous, slender and short, sclerotized area at apex covered with minute setae.

Variation. Specimens from Bacan island have the hook-like apex of the penis more slender and the upper margin convex instead of straight as in the typical specimens ( Fig. 21F ).

Diagnosis. Adults of this species are similar to those of O. limbata Blanchard from New Guinea in possessing parallel-sided, metallic blue, densely punctate elytra, but differing by its more elongate elytra and narrower yellow lateral margin.

Other specimens examined. INDONESIA. Moluccas: 3 exs. ( JBCB), Bacan, Labuha, Hotel “Buana Lipu”, 0°39’00”N 127°29.6’E, 12.I.2006, leg. A. Weigel; 3 exs. ( NME), Bacan, 10km E Labahu, 0°38’07”N 127°34’46”E, 14.I.2006, leg. A. Weigel; Ternate: 1♂, 1♀ ( RMNH), leg. Bernstein.

Distribution. Indonesia: Ternate, Bacan ( 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 21. Diagnostic characters of Oides cyanella Jacoby. 21A. Antenna, male; 21B. Antenna, female; 21C. Penis, dorsal view; 21D.Penis,lateral view;21E.Penis,ventral view; 21F.Apexof penis, lateralview,from Becan; 21G.Abdominalventrite VIII; 21H. Spermatheca.

FIGURE8. Habitus of Oides apicalis Jacoby and O. cyanella Jacoby.8A. Typical form of O. apicalis, dorsal view; 8B. Same, ventral view; 8C. Same, lateral view; 8D. Color variation of O. apicalis, dorsal view; 8E. Color variation of O. apicalis, dorsal view; 8F. Coloration variation of O. apicalis (paralectotype of O. maculicollis Jacoby), dorsal view; 8G. O. cyanella, dorsal view; 8H. Same, ventral view; 8I. Same, lateral view.