Oides dimidiaticornis Jacoby
Creators: name: Lee, Chi-Feng
name: Beenen, Ron
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Chrysomelidae
Oides
Oides dimidiaticornis

description: Oides dimidiaticornis Jacoby
(Figs 26A–26C, 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) 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), 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), 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) 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) transverse, apical margin broadly rounded and slightly depressed at middle, with cluster of long setae near middle; spiculum long. Receptacle of spermatheca (Fig. 27F) 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.
description: Published as part of Lee, Chi-Feng & Beenen, Ron, 2017, Revision of the Palaearctic and Oriental species of the genus Oides Weber, 1801 (Coleoptera: Chrysomelidae: Galerucinae) in Zootaxa 4346 (1) on pages 39-41, DOI: 10.11646/zootaxa.4346.1.1, http://zenodo.org/record/1115692