Orchestoides Roelofs, 1875

Legalov, Andrei A., 2024, Two new species of genus Imachra Pascoe, 1874 (Coleoptera: Curculionidae) from Vietnam, Ecologica Montenegrina 73, pp. 39-45 : 40-45

Subgenus: Orchestoides Roelofs, 1875

Type species: Orchestoides decipiens Roelofs, 1875

Imachra (Orchestoides) zinchenkoi sp. n. ( Fig. 1 )

https://zoobank.org/ urn:lsid:zoobank.org:act:B9756C47-FFAB-466A-9905-0973E5BAE03C

Type material: Holotype, female, Vietnam, Hòa Bình Province, Yên Th ủy District, Yen Thuy , Lac Thinh , Cúc PhƯƠng National Park , 1-2.V.2002, V. K. Zinchenko.

Description. Female: Body black, covered with adpressed pale narrow scales. Apex of rostrum, antennae and tarsi red-brown. Rostrum robust and straight, about 1.2 times as long as pronotum, about 3.7 times as long as wide at apex, about 3.0 times as long as wide at midlength, about 3.3 times as long as wide at base, subglabrous apically, punctate in middle and basally. Forehead linear, 0.05 times as narrow as rostrum base width. Eyes large, convex, finely faceted. Temples slightly shorter than eyes. Vertex coarsely punctate. Antennal strobes lateral, directed obliquely toward beneath the base of rostrum. Antennae geniculate, inserted laterally near middle of rostrum. First antennomere long, about 4.2 times as long as wide at apex, not reaching eyes. Second–third antennomeres long-conical. Second antennomere about 2.3 times as long as wide at apex, about 0.6 times as long as and about 0.6 times as narrow as first antennomere. Third antennomere about 2.1 times as long as wide at apex, about 0.6 times as long as and about 0.6 times as narrow as second antennomere. Fourth–eighth antennomers obconical. Fourth antennomere about 1.7 times as long as wide at apex, about 0.7 times as long as and about 0.9 times as narrow as third antennomere. Fifth antennomere equal to fourth antennomere. Sixth antennomere about 1.3 times as long as wide at apex, about 0.8 times as long as and equal in width to fifth antennomere. Seventh antennomere about 0.9 times as long as wide at apex, slightly shorter and about 1.3 times as wide as sixth antennomere. Eighth antennomere about 0.7 times as long as wide at apex, subequal in length to and about 1.3 times as wide as seventh antennomere. Antennal club quite compact and long, about 4.0 times as long as wide in middle, slightly shorter than second–eighth antennomeres combined. Pronotum campanulate, equal in length and width at apex, about 0.7 times as long as midlength, about 0.6 times as long at pronotal base. Pronotal disk convex dorsally, coarsely punctate. Sides without erect setae. Scutellar shield convex, subequal in length and width. Elytra suboval, about 1.5 times as long as wide at base and at apical fourth, about 1.2 times as long as wide at midlength, about 3.4 times as long as pronotum. Humeri weakly convex. Elytral striae distinct. Interstriae weakly convex, densely rugose-punctate, 1.5-2.8 times as wide as striae. Prosternum punctate emarginate at anterior margin, depressed before coxae with carinate lateral borders. Precoxal portion short, about 0.4 times as long as length of procoxal cavity. Procoxal cavities quite widely separated. Postcoxal portion 1.2 times as long as precoxal portion. Mesocoxal cavities widely separated. Metanepisternum narrow, about 7.1 times as long as wide in middle, punctate. Metaventrite rather short, 1.4 times as long as metacoxal cavity length, convex, densely punctate. Abdomen ventrally convex, densely punctate. First ventrite 0.7 times as long as metacoxal length. Second ventrite about 0.9 times as long as first ventrite. Third ventrite equal to second ventrite. Posterior margin of second-fourth ventrites distinctly curved posteriad on lateral sides. Fourth ventrite about 0.9 times as long as third ventrite. Fifth ventrite about 2.7 times as long as fourth ventrite. Procoxae conical. Metacoxae transverse. Femora unarmed, sulcate for receiving tibiae. Pro- and mesofemora weakly clavate. Metafomora dilated. Tibiae unarmed. Metatibiae simple. Tarsi long. First tarsomere long-conical. Second tarsomere conical. Third tarsomere bilobed. Fifth tarsomere elongate. Tarsal claws divergent and dentate. Total body length (without rostrum) 2.6 mm. Length of rostrum 0.7 mm.

Comparison. The new species is similar to Imachra (Orchestoides) shirozui ( Morimoto, 1964) but differs in broad pronotum, more robust elytra, black tibiae, femora and rostrum, densely punctate elytral interstriae, pronotum without three stripes of scales, elytra without postscutellar patch and subbasal patches of scales.

Etymology. Patronymic. In honour of Dr. Vadim K. Zinchenko (Novosibirsk), who collected this specimen.

Localisation. Vietnam (Hòa Bình Province).

Imachra (Orchestoides) colonnellii sp. n. ( Fig. 2 )

https://zoobank.org/ urn:lsid:zoobank.org:act:58036D6F-5257-4F7F-AB98-05FA4333AA8E

Type material: Holotype, male, Vietnam, Hòa Bình Province, Yên Th ủy District, Yen Thuy , Lac Thinh , Cúc PhƯƠng National Park , 1-2.V.2002, V. K. Zinchenko.

Description. Male: Body black, covered with curved pale setae. Apex of rostrum, antennae and tarsi red-brown. Rostrum robust and weakly curved, slightly shorter than pronotum, about 3.7 times as long as wide at apex, about 3.4 times as long as wide at midlength, 3.1 times as long as wide at base, finely punctate. Forehead linear, about 0.2 times as narrow as rostrum base width. Eyes large, convex, finely faceted. Temples slightly shorter than eyes. Vertex densely punctate. Antennal strobes lateral, directed obliquely toward beneath the base of rostrum. Antennae geniculate, inserted laterally behind middle of rostrum. First antennomere long, 6.0 times as long as wide at apex, not reaching eyes. Second– third antennomeres long-conical. Second antennomere 2.2 times as long as wide at apex, about 0.4 times as long as and subequal in width to first antennomere. Third antennomere about 2.7 times as long as wide at apex, about 0.7 times as long as and 0.6 times as narrow as second antennomere. Fourth–eighth antennomers obconical. Fourth antennomere about 1.9 times as long as wide at apex, about 0.9 times as long as and 1.2 times as wide as third antennomere. Fifth antennomere 1.1 times as long as wide at apex, about 0.6 times as long as and about 1.1 times as wide as fourth antennomere. Sixth antennomere equal in length and width, about 0.9 times as long as and equal in width to fifth antennomere. Seventh antennomere about 0.7 times as long as wide at apex, subequal in length to and about 1.4 times as wide as sixth antennomere. Eighth antennomere 0.5 times as long as wide at apex, about 0.8 times as long as and about 1.1 times as wide as seventh antennomere. Antennal club quite compact and long, about 0.7 times as long as second–eighth antennomeres combined. Ninth antennomere about 1.1 times as long as wide, about 2.7 times as long as and about 1.2 times as wide as eighth antennomere. Ninth antennomere subequal in length and width, about 0.9 times as long as and equal in width to ninth antennomere. Eleventh antennomere about 2.2 times as long as wide, about 1.9 times as long as and about 0.9 times as narrow as tenth antennomere. Pronotum campanulate, about 1.2 times as long as width at apex, about 0.8 times as long as midlength and at pronotal base. Pronotal disk convex dorsally, densely punctate. Sides without erect setae. Scutellar shield rhomboidal, convex, subequal in length and width. Elytra suboval, about 1.5 times as long as wide at base, about 1.4 times as long as wide at midlength, about 1.7 times as long as wide at apical fourth, about 2.9 times as long as pronotum. Humeri weakly convex. Elytral striae distinct. Interstriae weakly convex, finely punctate, 1.5-1.8 times as wide as striae. Prosternum punctate emarginate at anterior margin, depressed before coxae with carinate lateral borders. Pre- and postcoxal portions short. Procoxal cavities quite widely separated. Mesocoxal cavities widely separated. Metanepisternum narrow, finely punctate. Metaventrite short, about 1.3 times as long as metacoxal cavity length, convex, punctate. Abdomen ventrally convex, densely punctate. First ventrite 0.7 times as long as metacoxal length. Second ventrite about 0.8 times as long as first ventrite. Third ventrite about 0.9 times as long as second ventrite. Posterior margin of second-fourth ventrites distinctly curved posteriad on lateral sides. Fourth ventrite equal to third ventrite. Fifth ventrite about 2.2 times as long as fourth ventrite. Procoxae conical. Metacoxae transverse. Femora unarmed, sulcate for receiving tibiae. Pro- and mesofemora weakly clavate. Metafomora dilated. Tibiae unarmed. Metatibiae simple. Tarsi long. First tarsomere long-conical. Second tarsomere conical. Third tarsomere bilobed. Fifth tarsomere elongate. Tarsal claws divergent and dentate. Total body length (without rostrum) 2.8 mm. Length of rostrum 0.7 mm.

Comparison. The new species is similar to Imachra (Orchestoides) nipponica ( Morimoto, 1964) but differs in the black body, pronotum and elytra without patches and stripes of scales, longer rostrum and a distinctly laterally curved apex of the aedeagus.

Etymology. Patronymic. In honour of Dr. Enzo Colonnelli (Rome), who helps me with the literature.

Localisation. Vietnam (Hòa Bình Province).

Acknowledgements

The author is grateful to Vadim K. Zinchenko (Novosibirsk, Russia) and Enzo Colonnelli (Roma, Italy) for help with this research and to anonymous reviewers for improving the overall quality of the manuscript.

References

Alonso-Zarazaga, M.A. & Lyal, C.H.C. (1999) A world catalogue of families and genera Curculionoidea (Insecta: Coleoptera) (excepting Scolytidae and Platypodidae). Barcelona: Entomopraxis. 315 pp.

Alonso-Zarazaga, M.A., Barrios, H., Borovec, R., Bouchard, P., Caldara, R., Colonnelli, E., Gültekin, L., Hlaváč, P., Korotyaev, B., Lyal, C.H.C., Machado, A., Meregalli, M., Pierotti, H., Ren, L., Sánchez- Ruiz, M., Sforzi, A., Silfverberg, H., Skuhrovec, J., Trýzna, M., Velázquez de Castro, A.J., Yunakov, N.N. (2023) Cooperative catalogue of Palaearctic Coleoptera Curculionoidea. 2nd Edition. Monografías electrónicas, 14, 780 p.

Kojima, H. & Morimoto, K. (1996) Systematics of the flea weevils of the tribe Ramphini (Coleoptera, Curculionidae) from East Asia. II. Phylogenetic analysis and higher classification. Esakia, 36, 97–134.

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, Coleoptera, beetles, Vol. 2: Morphology and systematics (Elateroidea, Bostrichiformia, Cucujiformia partim). Leschen, R.A.B, Beutel, R.G., Lawrence J.F. (Eds.). Walter de Gruyter, Berlin and New York, 9–20.

Legalov, A.A. (2016) New weevils (Curculionidae) in Baltic amber. Paleontological Journal, 50 (9), 970–985. https://doi.org/10.1134/S0031030116090057

Legalov, A.A. (2020 a) A review of the Curculionoidea (Coleoptera) from European Eocene ambers. Geosciences, 10, 1 (16), 1–74. https://doi.org/10.3390/geosciences10010016

Legalov, A.A. (2020 b) A new species of the genus Orchestes Illiger, 1798 (Coleoptera, Curculionidae) from New Guinea. Baltic Journal of Coleopterology, 20 (1), 19–22.

Legalov, A.A. (2023) New weevils (Coleoptera: Curculionidae) from Baltic amber. Paleontological Journal, 57 (7), 784–804. https://doi.org/10.1134/S0031030123070067

Legalov, A.A. (2024 a) A new genus of the tribe Rhamphini (Coleoptera: Curculionidae) from the Philippines. Ecologica Montenegrina, 72, 1–5. https://dx.doi.org/10.37828/em.2024.72.1

Legalov, A.A. (2024 b) A new species of the genus Ixalma Pascoe, 1871 (Coleoptera: Curculionidae) from the Philippines. Ecologica Montenegrina, 72, 6–10.

https://dx.doi.org/10.37828/em.2024.72.2

Legalov, A.A. (2024 c) A new genus of the tribe Rhamphini (Coleoptera: Curculionidae) from Zimbabwe. Ecologica Montenegrina, 72, 136–140. https://dx.doi.org/10.37828/em.2024.72.12

Legalov, A.A. (2024 d) A new species of the genus Orchestes Illiger, 1798 (Coleoptera, Curculionidae) from Mindanao island, the Philippines. Euroasian Entomological Journal, 23 (2), 102–104.

https://dx.doi.org/10.15298/euroasentj.23.02.05

Marshall, G.A.K. (1948) Entomological results from the Swedish expedition 1934 to Burma and British India. Coleoptera: Curculionidae. Novitates Zoologicae, 42 (3), 397–473.

Marshall, G.A.K. (1953) New Curculionidae (Col.) from Indo-China. The Entomologist’s Monthly Magazine, 89 (4), 90–93.

Morimoto, K. & Miyakawa, S. (1996) Systematics of the flea weevils of the tribe Ramphini (Coleoptera, Curculionidae) from East Asia II. Phylogenetic analysis and higher classification. Esakia, 36, 97–134.

Morimoto, K. (1964) Key and illustrations for the identification of the curculionid-beetles of Japan and the Ryukyus. II. Subfamily Rhynchaeninae. Kontyû, 32, 449–456.

Morimoto, K. (1984) The family Curculionidae of Japan. IV. Subfamily Rhynchaeninae. Esakia, 22, 5– 76.

Pascoe, F.P. (1874) Contributions towards a knowledge of the Curculionidae. Part IV. Journal of the Linnean Society of London, Zoology, 12, 1–99, pls. I–IV.

Roelofs, W. (1875) Curculionides recueillis au Japon par M. G. Lewis. Troisième et dernière partie. Annales de la Société Entomologique du Belgique, 18 (2), 149–194, pls. I–III.

Voss, E. (1940) Über Rüsselkäfer der indomalayischen Subregion, vorwiegend von Java (Col, Cure). I. Teil. (82. Beitrag zur Kenntnis der Curculioniden). Tijdschrift voor Entomologie, 83, 17–93.

Voss, E. (1953) Über einige in Fukien (China) gesammelte Rüssler. IV. (Col, Curc.). (114. Beitrag zur Kenntnis der Curculioniden). Entomologische Blätter, 49 (2), 65–82.

Voss, E. (1958) Ein Beitrag zur Kenntnis der Curculioniden im Grenzgebiet der orientalischen und paläarktischen Region (Col, Curc.). Die von J. Klapperich und Tschung Sen in der Provinz Fukien gesammelten Rüsselkäfer. (132. Beitrag zur Kenntnis der Curculioniden). Decheniana (Beihefte), 5, 1–140.

Figures

Figure 1. Imachra zinchenkoi sp. n., holotype, female, habitus: a – dorsal view; b – frontal view; c – lateral view. Scale bar = 1.0 mm.

Figure 2. Imachra colonnellii sp. n., holotype, male: a – habitus, lateral view; b – aedeagus, dorsal view; c – aedeagus, lateral view; d – habitus, dorsal view. Scale bar = 1.0 mm for a, d, 0.2 mm for b, c.