Orientogeochus antonkozlovi Legalov, 2024

Legalov, Andrei A., 2024, A new species of the genus Orientogeochus Legalov, 2021 (Coleoptera, Curculionidae) from the Philippines, Baltic Journal of Coleopterology (WPA) 24 (1), pp. 91-94 : 92-93

Orientogeochus antonkozlovi Legalov , sp. nov.

( Fig. 1 )

Type material: Holotype. Male ( ISEA), Philippines, Eastern Luzon, Isabela Prov., Cabagan , X.2019.

92

Description. Male: Body red-brown, almost glabrous. Antennae, spots on elytra and tarsi yellowish. Rostrum long, curved,

widened to apex, about 2.2 times as long as wide at apex, about 3.4 times as long as wide in middle and at base, about 1.1 times as long as pronotum, flattened at apex, sparse punctate, lacking carina. Mandibles large, almost straight at outer edge. Eyes large, rounded, coarsely faceted, weakly protruding from contour of head. Forehead flat, quite narrow, about 0.6 times as long as rostrum base width. Antennal scrobes dorsally, visible dorso-laterally at apex. Antennae long, inserted at apical third of rostrum, dorso-laterally. Antennomere 1 long, not reaching eyes, 7.0 times as long as wide at apex. Antennomere 2 suboval, about 2.3 times as long as wide, 0.2 times as long as and 0.6 times as narrow as antennomere 1. Antennomeres 3-4 longconical. Antennomere 3 about 6.7 times as long as wide, about 1.4 times as long as and 0.5 times as narrow as antennomere 2. Antennomeres 5-7 conical. Antennomere 4 3.0 times as long as wide, about 0.5 times as long as and equal in length to antennomere 3. Antennomere 5 1.5 times as long as wide, about 0.7 times as long as and about 1.3 times as wide as antennomere 4. Antennomere 6 equal to antennomere 5. Antennomere 7 about 1.3 times as long as wide, about 1.2 times as long as and 1.4 times as narrow as antennomere 6. Antennal club compact, 2.0 times as long as wide in middle, about 0.5 times as long as antennomeres 2-7 combined, tomentose. Pronotum bell-shaped, 1.4 times as long as wide at apex, about 0.8 times as long as wide in middle, about 0.7 times as long as wide at base. Disk convex, coarsely punctate. Base of pronotum with scales. Scutellum absent. Elytra about 1.5 times as long as wide at base, about 1.1 times as long as wide in middle, about 1.9 times as long as wide at apex, about 2.5 times as long as pronotum, narrowed to apical fourth. Humeri smooth. Elytral striae distinct, with large punctation. Interstriae wider than width of elytral striae. Prosternum without postocular lobes. Pre- and postcoxal portions of prosternum short. Postcoxal portion longer than precoxal portion. Procoxal cavities distinctly separated. Mesocoxal cavities widely separated. Metaventrite flat, finely punctate, subequal to length of metacoxal cavity. Abdomen flattened, finely punctate. Ventrites 1 and 2 quite long. Ventrite 1 about 1.1 times as long as length of metacoxal cavity. Ventrite 2 about 0.8 times as long as ventrite 1. Ventrites 3 and 4 short, equal in length. Ventrite 3 about 0.6 times as long as ventrite 2. Ventrite 5 about 2.9 times as long as ventrite 4. Procoxae large, subconical. Meso- and metacoxae subspherical. Femora and tibiae densely punctate. Femora thickened, with small teeth on middle. Tibiae curved at basal fourth, without uncus and mucro. Tarsi quite wide. Tarsomere 1 conical. Tarsomere 2 wide-conical, wider and shorter than tarsomere 1. Tarsomere 3 wide-bilobed, with pulvilli on lower surface. Tarsomere 5 elongate. Tarsal claws free, strongly divergent, without teeth. Total body length (without rostrum) 1.75 mm. Length of rostrum 0.5 mm.

Diagnosis. The new species is close to Orientogeochus rheinheimeri Legalov, 2021 , but differs in wider elytral interstriae, a longer rostrum, and more strongly constricted elytra towards the apex.

Etymology. Patronymic. In honour of Anton Kozlov (Moscow), who helped me with the study.

Distribution. Philippines: Isabela Prov.

Figures

Fig. 1. Orientogeochus antonkozlovi sp. nov., holotype, male: a – habitus, dorsally; b – aedeagus, dorsally; c – habitus, ventrally; – aedeagus, laterally. Scale bar = 0.5 mm for a, c and 0.2 mm for b, d.