Taxonomic review of weevils of the tribe Celeuthetini, mainly from Sundaland, Sulawesi and the Lesser Sunda Islands (Coleoptera, Curculionidae, Entiminae) Author Riedel, Alexander text Zootaxa 2024 2024-06-10 5464 1 1 75 http://dx.doi.org/10.11646/zootaxa.5464.1.1 journal article 10.11646/zootaxa.5464.1.1 1175-5334 11612810 D59F17A0-5576-4EE6-B055-C1E94BE4BE1A Parasyntrophus Riedel gen. n. http://zoobank.org/ urn:lsid:zoobank.org:act: 9602EA39-6C44-427D-AF85-DB6431E7DE5C Type species: Idiopsis radiatifrons Heller, 1914 , by present designation. Description . Integument covered with appressed, microgranulate scales; elytra at least on declivity with rows of long erect clavate scales. Head with angulate or curved transverse sulcus separating rostral base; vertex with radial furrows sometimes more or less obscured by scales. Eyes protruding, asymmetrically convex, drawn posteriad; separated from apex of prothorax by ca. length of eye. Profile ( Fig. 40d ) anteriorly with marked constriction. Rostrum with dorsum between antennal scrobes narrow; posteriorly with distinct glabrous costa; apical declivity with sunk-in scales, weakly impressed; dorsal profile convex to subangulate. Antenna. Scape stout; in cross-section subrotund; with appressed scales and with interspersed long, curved, suberect scales. Funicle with article 2 subequal or longer (1.0–1.5 X) than article 1. Pronotum as long as, or slightly longer than wide; coarsely punctate. Metanepisternum narrow, sometimes concealed by scales. Elytra subovate, with 10 striae. Legs. Protibia ventrally simple, not denticulate. Venter. Procoxae approximate, separated by 0.15 X procoxal diameter; distance to apex 0.5 X distance to base of prothorax. Mesoventral process elongate, ca. 1.50 X as long as posterior width. Abdomen. Female ventrites 3–5 exposed, laterally half as long (0.5 X) as ventrites 1–2. Genitalia. Penis ( Figs. 26b , 27b , 28b ). Apodeme firmly attached to body. Transfer apparatus flagelliform, ca. 2–3 X as long as body of penis, subapically extremely thin. Etymology. The name is a combination of the Greek prefix para- (next to, near by) and the genus name Syntrophus . The gender is masculine. Notes . This group of species from Bali plus one undescribed species from Lombok is related to Syntrophus Marshall , but differs by its 10 elytral striae, more asymmetrically shaped eyes, and an elongate mesoventral process. Furthermore, the genus Apirocalodes Voss , is the closest relative of Syntrophus Marshall according to our latest molecular phylogenetic reconstructions. Idiopsodes Thompson , a replacement name of the genus to which these species were originally assigned to is completely unrelated and deeply nested in a clade of genera from New Guinea . The description of a new genus is the best solution to resolve these issues. Key to the species of Parasyntrophus gen. n. 1 Elytra dorsally flattened; interval 6 with lateral ridge, bearing fringe of long erect scales. Penis apically simple, not widened. Fig. 27a ............................................................ Parasyntrophus radiatifrons ( Heller, 1914 ) 1´Elytra dorsally convex. Penis subapically widened........................................................... 2 2 (1´) Elytra from base to apex with long, erect, subclavate scales. Fig. 26a ............... Parasyntrophus gitgitus ( Heller, 1914 ) 2´Elytra with long, erect scales limited to apical declivity. Fig. 28a ................ Parasyntrophus setosapex ( Heller, 1914 )