Oides dimidiaticornis 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) : 39-41

publication ID	https://doi.org/ 10.11646/zootaxa.4346.1.1
publication LSID	lsid:zoobank.org:pub:688F9A37-C1B5-4FBC-9CAC-90DE1D81E410
DOI	https://doi.org/10.5281/zenodo.6028892
persistent identifier	https://treatment.plazi.org/id/B820AC1F-FFFD-FFA6-3DA0-FCA80C2C477F
treatment provided by	Plazi
scientific name	Oides dimidiaticornis Jacoby
status

Treatment

( Figs 26A–26C View FIGURE 26 , 27 View FIGURE 27 )

Oides dimidiaticornis Jacoby, 1894: 299 ( Indonesia: Sulawesi); Weise, 1924: 3 (catalogue); Wilcox, 1971: 8 (catalogue); Kimoto, 1990: 218 (catalogue).

Types. Holotype ♂ ( MCZC, by monotypy), labeled: “ Celebes [h, w] // Oides / dimidiaticornis / Jac. [h, g] // Type [p] / 17338 [h, w]”.

Redescription. Length 11.3–12.7 mm, width 6.8–7.3 mm. General color ( Figs 26A–26C View FIGURE 26 ) yellowish; antenna blackish brown but antennomeres I–III, X–XI yellow with apical 1/4 of XI black; elytra metallic blue. Antenna filiform in males ( Fig. 27A View FIGURE 27 ), antennomeres IV longest, VI–XI slender, length ratios of antennomeres I–IX (X & XI lost) 1.0: 0.7: 1.8: 1.9: 1.4: 1.3: 1.3: 1.1: 1.1, length to width ratios of antennomeres I–IX 2.5: 2.0: 4.4: 5.2: 4.2: 4.1: 3.7: 3.6: 3.6; shorter in female ( Fig. 27B View FIGURE 27 ), length ratios of antennomeres I–XI 1.0: 0.5: 1.9: 1.7: 1.3: 1.2: 1.3: 1.1: 1.1: 1.0: 1.4, length to width ratios of antennomeres I–XI 2.3: 1.5: 5.4: 4.9: 4.1: 4.0: 4.3: 3.8: 4.0: 3.7: 5.2. Pronotum transverse, 2.1x wider than long, disc convex but flattened at sides, without reticulate microsculpture and but with dense, coarse punctures; baso- and apico-lateral angles boradly rounded; lateral margin rounded; apical margin slightly concave. Elytra elongate oval, widest at middle, 1.4–1.5x longer than wide; disc shining and 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 apical 1/4; humeral calli prominent, with depression posterior to calli. Penis ( Figs 27C–27D View FIGURE 27 ) slender, 7.7x longer than wide; parallel-sided, apically tapering from middle, forming extremely slender and parallel-sided apex from apical 1/7; tectum extremely elongate, apically reaching apex of penis, base wide; slightly curved in lateral view, recurved at apical 1/7, apex anterior and posterior angular; ventral surface well sclerotized, internal sac without sclerites. Apical margin of abdominal ventrite V in female truncate or slightly concave. Gonocoxae reduced. Ventrite VIII ( Fig. 27E View FIGURE 27 ) transverse, apical margin broadly rounded and slightly depressed at middle, with cluster of long setae near middle; spiculum long. Receptacle of spermatheca ( Fig. 27F View FIGURE 27 ) as wide as pump, connected to pump; pump strongly curved, apically swollen; proximal spermathecal duct elongate.

Diagnosis. This species belongs to the Oides celebensis species group. Members of the species are easily distinguished by the characteristic color pattern of the antennae and coarse punctures on the elytra. Aedeagi of male O. dimidiaticornis are similar to those of O. bezdeki sp. nov., O. takizawai sp. nov. and O. wangi sp. nov. in possessing an elongate tectum and apically narrowed penis. However, males of O. dimidiaticornis are similar to those of O. bezdeki sp. nov. in possessing a slender and angular apex of the penis. They differ in possessing an apically tapering tectum and apex of the penis (apically broadened tectum and the truncate apex of penis in O. dimidiaticornis ).

Other specimens examined. INDONESIA. Sulawesi: 1♀ ( NMHB), Assumpatu-Tai, leg. Sarasin; 2♀♀ ( NMHB), Bantimurung, leg. Sarasin; 1♀ ( TCHU), same locality, 26.IV.2008, leg. 1♂ ( RMNH), Patuhuang, I.1896, leg. H. Fruhstorfer.

Distribution. Indonesia: Sulawesi.