35. Chaetocnema (Chaetocnema) sabahensis Ruan, Konstantinov & Yang, New Species (Fig. 56) Etymology: This species is named after the type locality. Specific epithet is a noun in apposition. Distribution: Malaysia, Singapore. Host plants: Unknown. Diagnosis: This species resembles C. hainanensis by the following characters: a distinct ridge present on each side of aedeagus on ventral side, in lateral view, aedeagus is strongly curved near apex and base, while straight at middle. However, they can be distinguished by the difference in shape of the body and aedeagus. This species also resembles C. luisiadae from Bagaman Islands in the Louisiade Archipelago [Papua New Guinea], however, it differs from the latter by narrower frontal ridge and sinuated base of pronotum. The female of Chaetocnema sabahensis is rather unique among the Oriental species of the genus in having a trilobed (usually simple in other species) last abdominal ventrite (Fig. 56 J). Description: Body length (excluding head): 1.85–2.10 mm, ... : Published as part of Ruan, Yongying, Yang, Xingke, Konstantinov, Alexander S., Prathapan, Kaniyarikkal D. & Zhang, Mengna, 2019, Revision of the Oriental Chaetocnema species (Coleoptera, Chrysomelidae, Galerucinae, Alticini), pp. 1-206 in Zootaxa 4699 (1) on pages 95-97, DOI: 10.11646/zootaxa.4699.1.1, http://zenodo.org/record/3543038 ...