Afroramhus yakovlevi, Legalov, 2024

Legalov, Andrei A., 2024, A new genus of the tribe Rhamphini (Coleoptera: Curculionidae) from Zimbabwe, Ecologica Montenegrina 72, pp. 136-140 : 137-140

Afroramhus yakovlevi sp. n. ( Fig. 1 )

https://zoobank.org/ urn:lsid:zoobank.org:act:71EAACA9-C3C3-44FE-B523-4053259D1D9E

Type material: Holotype, female, Zimbabwe, [Mashonaland] East Prov., 12 km E of Marondera, Gosho Park , 1635 m, 11.IV.2011, R. Yakovlev.

Description. Female: Body black, covered with adpressed pale narrow setae. Rostrum long and weakly curved, about 1.2 times as long as pronotum, about 4.7 times as long as wide at apex, about 3.7 times as long as wide at midlength, 4.0 times as long as wide at base, glabrous at apical half, parallel rugose at basal half. Forehead linear, about 0.2 times as narrow as rostrum base width, densely punctate. Eyes large, convex, finely faceted. Temples shorter than eyes. Vertex coarsely punctate. Antennal strobes lateral, directed to eye. Antennae geniculate, inserted laterally before basal third of rostrum. First antennomere long, 4.5 times as long as wide at apex, not reaching eyes. Second–sixth antennomeres obconical. Second antennomere about 3.3 times as long as wide at apex, about 0.6 times as long as and slightly narrower than first antennomere. Third to fifth antennomeres subequal in width. Third antennomere about 3.0 times as long as wide at apex, 0.6 times as long as and about 0.7 times as narrow as second antennomere. Fourth antennomere about 1.7 times as long as wide at apex, about 0.7 times as long as and 1.2 times as wide as third antennomere. Fifth antennomere about 1.3 times as long as wide at apex, about 0.8 times as long as and equal in width to fourth antennomere. Sixth antennomere subequal in length and width, equal in length to and about 1.3 times as wide as fifth antennomere. Seventh antennomere wide-conical, about 0.8 times as long as wide at apex, subequal in length to and about 1.3 times as wide as sixth antennomere. Antennal club quite compact. Eighth antennomere about 0.6 times as long as wide at apex, about 0.4 times as long as and about 1.8 times as wide as seventh antennomere. Ninth antennomere 0.5 times as long as wide at apex, equal in length to and about 1.1 times as long as eighth antennomere. Tenth antennomere about 1.4 times as long as wide at base, 2.5 times as long as and slightly narrower than ninth antennomere. Pronotum campanulate, about 1.1 times as long as wide at apex, about 0.7 times as narrow as midlength, about 0.6 times as long at pronotal base. Pronotal disk convex dorsally, densely punctate. Sides with long erect setae. Scutellar shield trapezoidal, subequal in length and width. Elytra about 1.5 times as long as wide at base, about 1.4 times as long as wide at midlength, about 1.6 times as long as wide at apical fourth, 3.0 times as long as pronotum. Humeri weakly convex. Elytral striae distinct. Interstriae weakly convex, rugose-punctate, 3.5-4.0 times as wide as striae. Prosternum punctate. Precoxal portion short, about 0.4 times as long as length of procoxal cavity. Procoxal cavities narrowly separated. Postcoxal portion slightly longer than precoxal portion. Mesocoxal cavities widely separated. Metanepisternum quite narrow, punctate. Metaventrite rather short, about 1.5 times as long as metacoxal cavity length, convex, densely punctate. Abdomen ventrally convex, densely punctate. First ventrite equal to metacoxal length. Second ventrite slightly shorter than first ventrite. Third ventrite about 0.7 times as long as second ventrite. Posterior margin of second-fourth ventrites distinctly curved posteriad on lateral sides. Fourth ventrite slightly shorter than third ventrite. Fifth ventrite 2.0 times as long as fourth ventrite. Procoxae conical. Metacoxae transverse. Femora with small tubercle, not 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) 2.4 mm. Length of rostrum 0.6 mm.

Etymology. Patronymic. In honour of Prof. Dr. Roman V. Yakovlev (Barnaul), who collected this specimen.

Localisation. Zimbabwe (Mashonaland East Prov.).

A list of species of the subtribe Rhamphina of sub-Saharan Africa

Afroramhus Legalov , gen. n. A. yakovlevi Legalov , sp. n. – Zimbabwe

Orchestes Illiger, 1798

O. africanus Hustache, 1929 – Kenia

O. camerunicus Hustache, 1938 – Cameroon, Democratic Republic of Congo O. coeruleus ( Voss, 1962) – Democratic Republic of Congo

O. flavonasis ( Voss, 1963) – Ethiopia

O. ruandae Marshall, 1955 – Ruanda

O. tristis ( Voss, 1962) – Democratic Republic of Congo

O. wittenus ( Voss, 1962) – Democratic Republic of Congo

Pseudorchestes Bedel, 1894 P. erinaceus Korotyaev, 1996 – Namibia

Rhamphus Clairville, 1798

Rh. tarsalis ( Voss, 1964) – Sudan

Rhynchaenus Clairville, 1798

Rh. mus Voss, 1964 – Sudan

Tachyerges Schoenherr, 1825

T. melancholicus Fahraeus, 1843 – South Africa

Acknowledgements

The author is grateful to Roman V. Yakovlev (Barnaul, Russia) for help with this research and to anonymous reviewers for improving the overall quality of the manuscript.

References

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Figures

Figure 1. Afroramhus yakovlevi sp. n., holotype, female: a – habitus, dorsal view; b – habitus, frontal view; c – abdomen. Scale bar = 1.0 mm.