Derelomini, Latreille, 1865

Haran, Julien, Benoit, Laure, Procheş, Şerban & Kergoat, Gael J., 2022, Ebenacobius Haran, a new southern African genus of flower weevils (Coleoptera: Curculioninae: Derelomini) associated with dicotyledonous plants, European Journal of Taxonomy 818 (1), pp. 1-54 : 6

publication ID	https://doi.org/ 10.5852/ejt.2022.818.1771
publication LSID	lsid:zoobank.org:pub:17950060-6B62-4479-BAF0-473767DC6ADB
DOI	https://doi.org/10.5281/zenodo.6536651
persistent identifier	https://treatment.plazi.org/id/03B087DC-FFF6-8B2F-5E8F-FB352616F84B
treatment provided by	Felipe
scientific name	Derelomini
status

Treatment

Key to genera of afrotropical continental Derelomini (sensu Franz 2006)

1. Eyes in dorsal view flat, not protruding over contour of head capsule in dorsal view. Larvae developing on Elaeis guineensis Jacq. (Arecaceae) View in CoL ......................................................................... 2

– Eyes in dorsal view convex ( Fig. 1B View Fig ), at least moderately exceeding the contour of head capsule in dorsal view ( Fig. 2F View Fig ). Larvae developing on other plants than Elaeis guineensis View in CoL ........................... 3

2. Integument black, deeply sculptured, without darker or paler markings on prothorax and elytra. Prothorax with a knob or tooth between procoxae and basal margin of prosternum ......................... ........................................................................................................................ Prosoestus Faust, 1899

– Integument yellow to reddish brown, shallowly sculptured, usually with dark markings on prothorax and elytra. Prothorax lacking knob or tooth behind procoxae, in some species males with a prosternal process between procoxae ................………………………..………… Elaeidobius Kuschel, 1952

3. Claws free ......................................................................................................................................... 4

– Claws connate. Central Africa ( Congo) ............................... Lomederus ghesquierei Marshall, 1932

4. Forehead flat, lacking a middle groove ( Fig. 1C View Fig ). Lateral carina of prothorax generally strangled before apex ( Fig. 1C View Fig ). Body of penis with a thickening near base, visible in lateral view. In males, stridulatory plate (tergite VII) basally indented on each side of the row of tubercles ........................ .............................................................................................................. Derelomus Schoenherr, 1825

– Forehead with a middle groove ( Fig. 1B View Fig ). Lateral carina of prothorax constricted before apex ( Fig. 1A View Fig ). Width of body of penis regular in lateral view ( Fig. 6 View Fig ). In males, stridulatory plate (tergite VII) with basal margin smooth, lacking indentation on each side of the row of tubercles ( Fig. 1J View Fig ) .. .............................................................................................................. Ebenacobius Haran gen. nov.

References

Figures

Fig. 1(see preceding page). A–M. Details of morphology and measurements of Ebenacobius Haran gen. nov. and Derelomus Schoenherr, 1825. A. Ebenacobius rhodesianus (Hesse, 1929) gen. et comb. nov. in dorsal view, with the white arrows showing where the measurements of width (w) and length (L) are made for the prothorax (top) and elytra (bottom). Black arrow showing the narrowing of prothorax near apical margin. B. Head in lateral view of E. rhodesianus with white arrow showing the groove on forehead and the black arrow showing the convexity of the eyes, exceeding the lateral curve of head. C. Head and apex of prothorax in dorsal view of Derelomus chamaeropsis Fabricius, 1798 with the white arrow showing flat forehead, lacking groove and black arrow showing the constriction on the prothorax near apical margin. D. Detail of the top-left part of the right elytron in E. rhodesianus showing the white scales on interstriae and with the well aligned punctures at base of stria 1 highlighted in white. E. Detail of the top-left part of the right elytron in E. costalis (Fåhraeus, 1844) gen. et comb. nov. showing the setae on interstriae and with the misaligned punctures at base of stria 1 highlighted in white. F. Protibia of males of E. rhodesianus, showing the apical acute mucro and the ante-apical brush of setae. G. Head and prothorax of E. rhodesianus in lateral view with the arrows showing where measurements of rostrum and prothorax length are made. H. Right maxilla of E. rhodesianus in dorsal view. I. Penis of E. costalis in dorsal view showing were measurements are made for the body of penis (white arrows: width; top right black arrows: length) and the length of apodemes (bottom right black arrows).J. Stridulatory plate (tergite VII) in male of E. rhodesianus in dorsal view, with the cuticular tubercles used for stridulation highlighted in white. K–M. Female genitalia. K. Ovipositor in E. rhodesianus. L. Sternite VIII, same species. M. Spermatheca, same species. N. Right mandible, same species. O. Labial prementum, same species. A–O: not to scale.