Caenorhinus (Flavodeporaus) guskovae Legalov, 2021

Legalov, Andrei A., 2021, A new species of the genus Caenorhinus Thomson, 1859 (Coleoptera, Rhynchitidae) from Laos, Ecologica Montenegrina 41, pp. 6-9 : 7-9

Caenorhinus (Flavodeporaus) guskovae Legalov , sp. nov.

https://zoobank.org/ urn:lsid:zoobank.org:act:05775260-3F9A-4D23-9A9E-CEA6A07F22AA

( Fig. 1 )

Type material: Holotype, male ( NMNH), Laos centr., Bolikhamsai Province, 8 km NE of Ban Nape , 600 m, 18°21′ N, 105°08′, 1-18.V.2001, P. Pacholatko leg.

Description

Male. Body yellow, covered with decumbent light coloured hairs. Antennomeres 1-10, apex of rostrum, scutellum, base of elytra, tibiae, tarsomeres 1 and 5 black. Mandibles, antennomere 11, metaventrite, metanepisternum, femora near insertion of tibia dorsally, apex of tibiae, tarsomeres 2 and 3 dark-brown. Rostrum and head yellow-brown. Rostrum rather long, 0.9 times as long as pronotum, 2.4 times as long as wide at apex, 3.0 times as long as wide at middle and at base, slightly curved, slightly expanded to apex and weakly flattened. Mandibles rhinchitoid type (with external tooth). Eyes large, strongly convex, round, finely fused. Forehead flattened, 1.3 times as wide as width of rostrum basally, finely punctate. Temples long, 1.1 times as long as eye. Vertex convex, finely punctate. Head narrowed behind eyes. Neck well defined, transversely wrinkled. Antennae inserted subapically in rostrum, extend behind humeri. Antennomeres 1 and 2 long-oval. Antennomere 1 1.8 times as long as wide in apex. Antennomere 2 2.1 times as long as wide, 0.9 times as long as and 0.8 times as narrow as antennomere 1. Antennomeres 3-9 long-conical. Antennomere 3 4.0 times as long as wide, 1.6 times as long as and 0.9 times as narrow as antennomere 2. Antennomeres 3-6 subequal in wide. Antennomere 4 3.3 times as long as wide, 0.8 times as long as antennomere 3. Antennomere 5 4.0 times as long as wide, 1.2 times as long as antennomere 4. Antennomere 6 3.7 times as long as wide, 0.9 times as long as antennomere 5. Antennomere 7 3.4 times as long as wide, 1.1 times as long as and 1.2 times as wide as antennomere 6. Antennomere 8 2.3 times as long as wide, 0.8 times as long as and 1.1 times as wide as antennomere 7. Antennal club strongly not compact. Antennomere 9 3.3 times as long as wide, 2.0 times as long as and 1.4 times as narrow as antennomere 8. Antennomere 10 3.0 times as long as wide, equal in length and 1.1 times as narrow as antennomere 9. Antennomere 11 5.0 times as long as wide, 1.4 times as long as and 0.8 times as narrow as antennomere 10. Pronotum campanulate, 1.6 times as long as wide at apex, 1.0 times as long as wide in middle and slightly longer than wide at base. Disk weakly convex, densely punctate. Scutellum 1.3 times as long as wide at base, trapezoid, finely punctate. Elytra 1.4 times as long as wide at base, 1.3 times as long as wide at middle, 1.3 times as long as wide at apical fourth, 2.1 times as long as pronotum. Humeri slightly flattened. Elytral striae distinct. Scutellar striole absent. Stria 9 full, merging with stria 10 near metacoxa. Interstriae weakly convex, 2.0-2.5 times as wide as elytral stria, finely punctate. Prosternum finely punctate. Pre- and postcoxal portions of prosternum short. Procoxal cavities contiguous. Metanepisternum 4.5 times as long as wide, finely punctate. Metaventrite 1.5 times as long as length of metacoxa, weakly convex, punctate. Abdomen convex, punctate. Procoxae large, conical. Metacoxae transverse. Femora weakly thickened. Tibiae almost straight, flattened, with costate dorsal margin. Pro- and mesotibiae with mucro. Tarsi long. Tarsomere 1 long-conical. Tarsomere 2 conical. Tarsomere 3 bilobed. Tarsomere 5 elongate. Tarsal claws divergent and dentate. Protarsi: tarsomere 1 2.1 times as long as tarsomere 2; tarsomere 3 1.1 times as long as tarsomere 2; tarsomere 5 1.9 times as long as tarsomere 2. Mesotarsi: tarsomere 1 2.5 times as long as tarsomere 2; tarsomere 3 1.3 times as long as tarsomere 2; tarsomere 5 2.3 times as long as tarsomere 2. Metatarsi: tarsomere 1 2.3 times as long as tarsomere 2; tarsomere 3 1.1 times as long as tarsomere 2; tarsomere 5 2.1 times as long as tarsomere 2. Total body length (without rostrum) 4.5 mm. Length of rostrum 0.9 mm.

Differential diagnosis. The new species is similar to Caenorhinus (Flavodeporaus) nigrobasalis Legalov, 2003 from Vietnam ( Figs. 1-2 ) but differs from it in the densely punctate pronotum, antennae extend behind humeri, forehead without a black band, black protibiae, dark-brown metaventrite and metanepisternum, and narrower rostrum (3.0 times as long as wide at middle in C. guskovae sp. nov. and 2.0 times as long as wide at middle in C. nigrobasalis ).

Etymology. The species is named in late Dr. Elena V. Guskova ( Russia).

Localisation. Central Laos, Bolikhamsai ( Fig. 2 ).

Figures

Figure 1. Caenorhinus (Flavodeporaus), body, dorsally: a – C. (F.) guskovae sp. nov., male, holotype, b – C. (F.) nigrobasalis, male, paratype (ISEA), “Vietnam, Guang Nam Prov., Bang, 11.VI.1983, Medvedev”. Scale bar = 1.0 mm

Figure 2. Distribution: octagon – Caenorhinus (Flavodeporaus) guskovae sp. nov., circle – C. (F.) nigrobasalis.