Proctorus emarginatus Lewis & Anderson, 2022

Lewis, Jake H. & Anderson, Robert S., 2022, A revision of the North American genus Proctorus (Coleoptera, Curculionidae, Ellescini) with descriptions of two new species, ZooKeys 1131, pp. 135-153 : 135

Proctorus emarginatus Lewis & Anderson sp. nov.

Figs 2A-C , 6 , 7G, H

Material examined.

Holotype: Canada: British Columbia: Summit Lake (Alaska Highway - mi. 392), 25 June 1959, R.E. Leech, on Salix (1 male, CNCI), JHLRSA_PROC_325 . Paratypes: Canada: Alberta: Tp. 78, Rge. 15, 5 June 1984, B.F. & J.L. Carr (1, CMNC), JHLRSA_PROC_323 ; Northwest Territories: Highway 5 (49 km, east of junction with Highway 2), 16 June 1988, B.F. & J.L. Carr (1, CNCI), JHLRSA_PROC_324 .

Diagnosis.

Length 2.9-3.1 mm. Body (especially rostrum and femora) dark, although elytra often has orange stripe extending posteriorly from humerus. Protibiae of male not prominently dentate on inner edge. Elytra without clear, distinct x-pattern of white scales. Fifth ventrite of male with a single transverse ridge which peaks medially; without any baso-medial ventral projection. Apical tooth of metatibiae of male straight. Aedeagus with apex distinctly emarginate and with four prominent lobes (two on each side).

Etymology.

The specific name refers to the apically emarginate body of the penis.

Ecology.

One specimen was collected from Salix . However, nothing else is known of the natural history of this species.

Remarks.

This species is known only from northwestern North America (only Canada at present), and based on institutional collection records also represents one of the rarer weevils in Canada. The female of P. emarginatus is unknown.

Figures

Figure 2. A-C male Proctorus emarginatus fifth ventrite A slightly oblique view B oblique view C ventral (straight-on) view D-F male Proctorus decipiens fifth ventrite D slightly oblique view E oblique view F ventral (straight-on) view.

Figure 6. Proctorus emarginatus habitus (USI: JHLRSA _ PROC _ 325) A dorsal (♂) B lateral (♂).

Figure 7. Aedeagi of four Proctorus species. Proctorus decipiens (USI: JHLRSA _ PROC _ 035) A dorsal B lateral. Proctorus armatus (USI: JHLRSA _ PROC _ 316) C dorsal D lateral; Proctorus truncatus (USI: JHLRSA _ PROC _ 295) E dorsal F lateral; Proctorus emarginatus (USI: JHLRSA _ PROC _ 325) G dorsal H lateral.