Orthorhynchus (Australobelus) dmitrii Legalov, 2023

Legalov, Andrei A., 2023, First record of the genus Orthorhynchus Kirby, 1819 (Coleoptera, Belidae) from Papuan Region, Ecologica Montenegrina 68, pp. 1-5 : 3-4

Orthorhynchus (Australobelus) dmitrii Legalov , sp. nov.

https://zoobank.org/ urn:lsid:zoobank.org:act:4401F249-806A-46C1-9F39-D7C20A30DCD3

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Type material: Holotype, female ( NME), INDONESIA: New Guinea, Papua Prov., Star Mountains , N Oksibil, 4°54’01”S, 140°38’48”E, 1350-1380 m, gardens & secondary lower montane rainforest on limestone, 10.III.2018, D. Telnov.

Description. Female: Body black, covered with curved setae. Meso- and metafemora brown. Sparse light hairs on body forming a row of spots near suture and several spots in apical half of elytral side, and also short median longitudinal stripe on pronotum in front of the scutellum. Yellowish hairs forming stripe on sides of pronotum and spots on mesepisternum and mesepimeron, on base and apex of metepisternum and on sides of abdominal ventrites. Head weakly widened behind eye. Labrum fused. Mandibles small. Rostrum long, curved, about 1.6 times as long as length of pronotum, 5.6 times as long as wide at apex, about 6.2 times as long as wide in middle, 4.7 times as long as wide at base, finely punctate in apical third, densely punctate in second and basal thirds. Eyes large, strongly convex and rounded, finely faceted. Forehead convex, densely rugose-punctate, subequal in width to rostrum base width. Vertex densely punctate. Temples short. Head ventrally transverse-rugose. Gular suture double, conniving at apex. Antennae long, inserted before middle of rostrum, extending towards elytral base. First and second antennomeres elongate-conical and flattened. First antennomere 4.0 times as long as wide at apex, not reaching eyes. Second antennomere about 2.4 times as long as wide at apex, 0.5 times as long as and about 0.85 times as narrow as first antennomere. Third – fifth antennomeres long-conical. Third antennomere conical, 3.1 times as long as wide at apex, slightly longer and about 0.8 times as narrow as second antennomere. Fourth antennomere about 3.3 times as long as wide at apex, slightly shorter and about 0.9 times as narrow as third antennomere. Fifth antennomere 3.0 times as long as wide at apex, slightly shorter and equal in width to fourth antennomere. Sixth-tenth antennomeres conical. Sixth antennomere about 1.9 times as long as wide at apex, equal in length and about 1.6 times as wide as fifth antennomere. Seventh antennomere about 1.7 times as long as wide at apex, slightly longer and about 1.2 times as wide as sixth antennomere. Eighth antennomere about 1.5 times as long as wide at apex, slightly longer and about 1.1 times as wide as seventh antennomere. Antennal club indistinct. Ninth antennomere 1.4 times as long as wide at apex, slightly longer and about 1.2 times as wide as eighth antennomere. Tenth antennomere about 1.3 times as long as wide at apex, subequal in length and 1.1 times as wide as ninth antennomere. Eleventh antennomere 3.5 times as long as wide at base, 2.0 times as long as and about 0.7 times as narrow as tenth antennomere. Pronotum almost bell-shaped, about 1.1 times as long as wide at apex, about 0.9 times as long as wide in middle and 0.95 times as long as wide at base. Sides weakly narrowed to apex and to base. Disk weakly convex, densely punctate and finely granulate near median weak furrow. Scutellum rectangular, 0.4 times as long as wide. Elytra about 3.8 times as long as wide at base, about 3.6 times as long as wide in middle, about 3.5 times as long as wide at apical fourth, about 4.8 times as long as pronotum, with slightly flattened humeri. Elytral striae indistinct. Elytral delicately sculptured by punctures and transverse wrinkles. Epipleura absent. Apex of elytra weak elongate. Pre- and postcoxal portions of prosternum very short. Procoxal cavities contiguous. Mesocoxal cavities narrowly separated, closed. Metaventrite weakly convex, finely punctate, about 3.9 times as long as length of mesocoxal cavity. Metepisternum about 1.7 times as long as wide in middle, finely punctate. Abdomen convex. First ventrite about 2.8 times as long as metacoxal cavity. Second ventrite 1.3 times as long as first ventrite. Third ventrite about 0.7 times as long as second ventrite. Fourth ventrite about 0.7 times as long as third ventrite. Fifth ventrite about 0.9 times as long as fourth ventrite. Procoxae large, conical. Metacoxae transverse. Femora thickened, without teeth. Profemora clavate. Tibiae almost straight. Protibiae with mucro, serrate at inner edge, with spur. Meso- and metatibiae with two apical spurs, without mucro. Tarsi long, quite narrow. First and second tarsomeres. Third tarsomere bilobed. Fifth tarsomere elongate. Claws free, without teeth. Total body length (without rostrum) 11.0 mm. Length of rostrum 3.8 mm.

Differential diagnosis. The new species is similar to Orthorhynchus (Australobelus) villosus (Lea, 1917) from Western Australia but differs in a more convex forehead, more delicately sculptured pronotum and elytra, sparse light hairs on the body forming a row of spots near the suture and several spots in the apical half of the side of the elytra, and also a short median longitudinal stripe on the pronotum in front of the scutellum, yellowish hairs forming a stripe on the sides of the pronotum and spots on the mesepisternum and mesepimeron, on the base and apex of the metepisternum and on the sides of the abdominal ventrites.

Etymology. Patronymic. In honour of Dmitry Telnov (Natural History Museum, London, United Kingdom), who studies the biodiversity of New Guinea beetles.

Localisation. New Guinea: Star Mountains.

Figures

Figure 2. Orthorhynchus (Australobelus) dmitrii Legalov, sp. nov., holotype, habitus: A –dorsal view; B – lateral view, right; C – lateral view, left. Scale bar = 1.0 mm.