Guineorhinotia

Legalov, Andrei A., 2024, A new species of the genus Orthorhynchoides Legalov, 2007 (Coleoptera: Belidae) from the Solomon Islands, Ecologica Montenegrina 77, pp. 113-116 : 114-116

Subgenus: Guineorhinotia Legalov, 2007

Type species: Belus viridimetallicus Heller, 1903

Orthorhynchoides (Guineorhinotia) solomonensis sp. n. ( Fig. 1 )

https://zoobank.org/ urn:lsid:zoobank.org:act:FEA6D98A-BB8F-48C5-8312-41B52A13096E

Type material: Holotype, female, “Solomon Is., Guadalcanal, Popomanaseu [ Mount Popomanaseu ], 4.800', 9.VII.1962, 277, P. Greenslade ”, “Solomon Is.: Pres. P.J.M. Greenslade, B.M. 1966-477”.

Description. Female: Body black with metallic lustre, covered with adpressed pale setae. Coxae and femora brownish. Yellowish setae forming four small spots on each elytron, stripe under each eye, condense on procoxal portion of prosternum, mesepimeron, underside of metepisternum, along outer edge of ventrites one to five. Head weakly widened posterior to eye. Labrum fused with rostrum. Mandible small. Rostrum long, weakly curved, about 1.2 times as long as length of pronotum, 4.3 times as long as wide across apex, about 4.6 times as long as wide across middle, about 2.5 times as long as wide across base, first three quarters of rostrum finely punctate dorsally, coarsely punctate in basal quarter. Eye large, strongly convex in lateral aspect and rounded, finely faceted. Forehead convex in dorsal aspect, densely rugose-punctate, slightly narrower than rostrum base. Vertex flattened, punctate. Temples short, about 0.6 times as long as eye length. Head ventrally transversely rugose. Gular suture double. Antennae long, antennal insertion at basal third of rostrum, extending towards elytral base when directed posteriad. First antennomere elongate-conical and flattened, about 3.1 times as long as wide at apex, not reaching eyes when directed posteriad. Second to fifth antennomeres elongate conical. Second antennomere about 1.7 times as long as wide at apex, half as long and about 0.9 times as wide as antennomere one. Third antennomere about 2.2 times as long as wide at apex, slightly longer and about 0.8 times as wide as antennomere two. Fourth antennomere 2.6 times as long as wide at apex, slightly longer and about 0.9 times as wide as antennomere three. Fifth antennomere 2.7 times as long as wide at apex, slightly longer and of same width as antennomere four. Antennal club poorly defined, consists of conical antennomeres six to eleven. Sixth to tenth antennomeres conical. Sixth antennomere about 2.3 times as long as wide at apex, slightly longer and 1.2 times as wide as antennomere five. Seventh antennomere 1.4 times as long as wide at apex, equal in length and about 1.7 times as wide as antennomere six. Eighth to tenth antennomeres of the same length. Eighth antennomere 1.6 times as long as wide at apex, about 1.1 times as long as and of same width as antennomere seven. Ninth antennomere about 1.5 times as long as wide at apex, 1.1 times as wide as antennomere eight. Tenth antennomere equal in length and width to antennomere nine. Eleventh antennomere about 2.7 times as long as wide at base, about 1.9 times as long as antennomere ten. Pronotum almost campanulate, about 1.2 times as long as wide across apex, about 0.9 times as long as wide across middle and base. Lateral margins slightly narrowed anteriad and posteriad to middle. Disk weakly convex, coarsely punctate and granulate, with median distinct furrow. Scutellum pentagonal, 0.5 times as long as wide. Elytra about 3.9 times as long as wide across base, 3.4 times as long as wide across middle, about 3.5 times as long as wide across apical fourth, 5.1 times as long as pronotum, with indistinct humeri. Elytral striae indistinct. Elytral densely sculptured by punctures and transverse wrinkles. Epipleura absent. Apex of elytra weakly prolonged. Pre- and postcoxal portions of prosternum very short. Procoxal cavities contiguous. Mesocoxal cavities narrowly separated, closed. Metaventrite weakly convex, finely rugose-punctate, about 3.1 times as long as length of mesocoxal cavity. Metepisternum about 4.8 times as long as its median width, sparsely punctate. Abdomen convex. First ventrite about 2.1 times as long as metacoxal cavity. Second ventrite slightly longer than first ventrite. Third ventrite about 0.8 times as long as ventrite two. Fourth ventrite about 0.8 times as long as third ventrite. Fifth ventrite about 0.7 times as long as ventrite four. Procoxae large, conical. Metacoxae transverse. Femora thickened, dentate: profemora clavate, bidentate, meso- and metafemora unidentate. Tibiae nearly straight. Protibiae with mucro, serrate on inner edge. Meso- and metatibiae with two apical spurs, without mucro. Tarsi long, quite narrow. Third tarsomere bilobed. Fifth tarsomere elongate. Claws free, without teeth. Total body length (without rostrum) 12.2 mm. Length of rostrum 2.3 mm.

Etymology. Named after the Solomon Islands archipelago. Comparison. The new species appears similar to Orthorhynchoides (Guineorhinotia) telnovi Legalov, 2003 from Indonesian New Guinea but differs in the brownish coxae and femora, the yellowish-setose underside of the metepisternum, the coarsely sculptured and densely punctate elytra. Distribution. So far known from Guadalcanal Island, Solomon Islands.

Acknowledgements

The author thanks Dr. Dmitry Telnov (Natural History Museum, London, United Kingdom), for the opportunity to study the material from Solomon Islands discussed herein, and anonymous reviewers for the valuable comments that improved the manuscript.

References

Lawrence, J.F., Beutel, R.G., Leschen, R.A.B., Slipinsky, S.A. (2010). Chapter 2. Glossary of Morphological Terms. Handbook of Zoology. Arthropoda: Insecta. Tb. 40: Coleoptera (Beetles). Vol. 2: Morphology and Systematic (Elateroidea, Bostrichformia, Cucujiformia partim), P. 9–20.

Legalov, A.A. (2003) New synonym in the genus Rhinotia Kirby (Coleoptera: Curculionoidea, Belidae). Euroasian Entomological Journal, 1 (2), 218. (in Russian).

Legalov, A.A. (2009) Annotated checklist of fossil and recent species of the family Belidae (Coleoptera) from the world fauna. Amurskii Zoologicheskii Zhurnal, 1 (4), 296–324, V–XIV.

Legalov, A.A. (2018) Annotated key to weevils of the world. Part 1. Families Nemonychidae, Anthribidae, Belidae, Ithyceridae, Rhynchitidae, Brachyceridae and Brentidae. Ukrainian Journal of Ecology, 8 (1), 780–831. https://doi.org/10.15421/2018_280

Legalov, A.A. (2023 a) Descriptions of new weevil taxa (Coleoptera, Curculionoidea). Euroasian Entomological Journal, 22 (1), 20–32. https://doi.org/10.15298/euroasentj.22.01.5

Legalov, A.A. (2023 b) First record of the genus Orthorhynchus Kirby, 1819 (Coleoptera, Belidae) from Papuan Region. Ecologica Montenegrina, 68, 1–5. https://dx.doi.org/10.37828/em.2023.68.1

Legalov, A.A. (2024) A new species of the genus Homalocerus Schoenherr, 1839 (Coleoptera: Belidae) from south-eastern Brazil. Ecologica Montenegrina, 71, 240–244.

https://dx.doi.org/10.37828/em.2024.71.25

Zimmerman, E.C. (1994) Australian weevils (Coleoptera: Curculionoidea). 1. Melbourne: CSIRO Australia, 563–637.

Figures

Figure 1. Orthorhynchoides (Guineorhinotia) solomonensis sp. n., holotype, female: a – habitus, dorsal view; b – habitus, ventral view; c – rostrum, head, pronotum and fore legs, dorso-lateral view; d – habitus, left lateral view; e – habitus, right lateral view. Scale bar = 1.0 mm.