Caenorhinus (Flavodeporaus) belokobylskii Legalov, 2022

Legalov, A. A., 2022, A new species of the genus Caenorhinus Thomson, 1859 (Coleoptera: Rhynchitidae) from Vietnam, Far Eastern Entomologist 445, pp. 1-6 : 2-5

Caenorhinus (Flavodeporaus) belokobylskii Legalov , sp. n.

http://zoobank.org/NomenclaturalActs/ 9356A246-3CB8-4DBB-8D0C-7215F82BF380

Figs 1–6

TYPE MATERIAL. Holotype – ♂, Vietnam: Hòa Bình Province, Yên Th ủy

District, Đa Phúc, 20°18ʹ N, 105°35ʹ E, h= 100 m, 3–4.V 2002, S. Belokobylskij

( ZIN). Paratypes: the same label as holotype, 1♀, 1♂ ( ZIN); Hòa Bình Province ,

Yên Thủy District, Cuc Phuong National Park (VƯờn Quốc Gia Cúc PhƯƠng),

20°23ʹ N, 105°34ʹ E, h= 300 m, 5–6. V 2002, 1♂, S. Belokobylskij ( ISEA) .

DESCRIPTION. Body brownish-yellow, covered with decumbent light coloured hairs. Antennae dark-brown. Rostrum, head, sides of pronotum brown.

MALE. Body length (without rostrum) 3.8–4.3 mm. Rostrum length 0.8–0.9 mm.

Rostrum subequal in length or slightly shorter than pronotum, 2.5–2.6 times as long as wide at apex, 3.8–3.9 times as long as wide at middle and 2.9–3.0 times as long as wide at base, slightly curved, distinctly expanded to apex, weakly flattened, subglabrous in apical part, coarsely punctate in basal part. Eyes large, strongly convex,

suboval, finely faceted. Forehead weakly impressed, 1.2–1.4 times as wide as width of rostrum basally, finely punctate. Temples quite long, 0.6–0.7 times as long as eye.

Vertex convex, densely punctate. Head narrowed behind eyes. Neck well defined,

transversely wrinkled. Antennae slender, inserted behind middle of rostrum, extend middle of pronotum. Antennomeres 1 and 2 long-oval, equal in length. Antennomere

1 2.0 times as long as wide in apex. Antennomeres 2–8 subconical. Antennomeres 3–

5 equal in length. Antennomeres 3–8 subequal in width. Antennomere 3 2.8 times as long as wide, 1.2 times as long as and 0.8 times as narrow as antennomere 2.

Antennomere 6 2.6 times as long as wide, 0.9 times as long as antennomere 5.

Antennomeres 7 and 8 equal in length. Antennomere 7 2.4 times as long as wide,

0.9 times as long as antennomere 6. Antennal club strongly not compact, 0.6 times as long as antennomeres 2–8 combined. Antennomeres 9 and 10 equal in length.

Antennomere 9 1.8 times as long as wide, 1.5 times as long as and 2.0 times as narrow as antennomere 8.

holotype, male; 2 – paratype, female. Scale bar 1.0 mm.

Antennomere 10 1.5 times as long as wide, 1.2 times as wide as antennomere 9.

Antennomere 11 2.0 times as long as wide, 1.1 times as long as and 0.8 times as narrow as antennomere 10. Pronotum campanulate, 1.6–1.7 times as long as wide at apex, 1.1 times as long as wide in middle and subequal to wide at base. Disk weakly convex, densely punctate. Scutellum trapezoid, finely punctate. Elytra 1.5 times as long as wide at base, 1.3–1.5 times as long as wide at middle, 1.5–1.6 times as long as wide at apical fourth, 2.2–2.3 times as long as pronotum, without metallic lustre.

Humeri slightly flattened. Elytral striae distinct. Scutellar striole absent. Stria 9 full,

merging with stria 10 near metacoxa. Interstriae convex, 4.0–5.0 times as wide as elytral stria, finely punctate. Prosternum finely punctate. Pre- and postcoxal portions of prosternum short. Procoxal cavities contiguous. Metanepisternum 3.2 times as aedeagus; 4 – tegmen; 5 – tergite 8; 6 – armament of endophallus. Scale bar 1.0 mm for figs

3–5.

long as wide, finely punctate. Metaventrite about 1.3 times as long as length of metacoxa, weakly convex, finely punctate. Abdomen convex, punctate. Ventrites 1

and 2 fused. Ventrite 1 about 0.5 times as long as length of metacoxa. Ventrite 2 2.0

times as long as ventrite 1. Ventrite 3 0.8 times as long as ventrite 2. Ventrite 4 subequal to ventrite 3. Ventrite 5 1.4 times as long as ventrite 4, without depression and teeth on each side. Part of propygidium and pygidium exposed. Procoxae large,

conical. Metacoxae transverse, without tooth. Femora weakly thickened, with costate dorsal margin in apical one third. Tibiae almost straight, flattened, with costate dorsal margin. Protibiae with mucro. Tarsi long. Tarsomere 1 long-conical. Tarsomere 2 wide-conical. Tarsomere 3 bilobed. Tarsomere 5 elongate. Tarsal claws divergent and dentate.

Armament of endophallus sclerotized ( Fig. 6 ).

FEMALE. Body length (without rostrum) 3.8 mm. Rostrum length 1.2 mm. Rostrum curved in place of antennal attachment, about 1.2 times as long as pronotum,

3.2 times as long as wide at apex, 4.5 times as long as wide at middle and 4.2 times as long as wide at base, subglabrous from apex to place of antennal attachment.

Forehead 1.4 times as wide as width of rostrum basally. Temples subequal in length to eye. Antennae inserted before middle of rostrum. Antennal club 0.5 times as long as antennomeres 2–8 combined. Antennomere 9 2.3 times as long as wide, 1.3

times as long as and 1.4 times as narrow as antennomere 8. Antennomere 10 1.8

times as long as wide, 0.9 times as long as, 1.1 times as wide as antennomere 9.

Antennomere 11 2.4 times as long as wide, 1.2 times as long as and 0.9 times as narrow as antennomere 10. Pronotum 1.7 times as long as wide at apex, 1.1 times as long as wide in middle and subequal to wide at base. Elytra 1.5 times as long as wide at base, 1.4 times as long as wide at middle, 1.3 times as long as wide at apical fourth, 2.3 times as long as pronotum. Metaventrite about 1.6 times as long as length of metacoxa. Ventrite 1 0.6 times as long as length of metacoxa. Ventrite 2 1.5

times as long as ventrite 1. Ventrite 3 0.8 times as long as ventrite 2. Ventrite 4 0.6

times as long as ventrite 3. Ventrite 5 1.3 times as long as ventrite 4. Tibiae without mucro.

COMPARISION. The new species is similar to C. (F.) lobanovi Legalov, 2021

from Laos but differs from the latter in the protibiae of males with mucro, longer and thinner rostrum, slender antennae, densely punctate head and pronotum, convex elytral interstriae, brownish-yellow elytra, slightly tapered aedeagus, and armament of the endophallus.

DISTRIBUTION. NW Vietnam: Hòa Bình Province.

ETYMOLOGY. The species is named in honor of Dr. Sergey A. Belokobylskij

(Sankt-Petersburg), who collected this species.

Figures

Figs 1, 2. Caenorhinus (Flavodeporaus) belokobylskii sp. n., habitus, dorsal view: 1 –

Figs. 3–6. Caenorhinus (Flavodeporaus) belokobylskii sp. n., genitalia, dorsal view: 3 –