Proeces longirostrum, Davis & Engel, 2007

Davis, S. R. & Engel, M. S., 2007, Cossonine weevils in Dominican amber (Coleoptera: Curculionidae), Linzer biologische Beiträge 39 (2), pp. 803-820 : 803-820

Proeces longirostrum nov.sp. ( Figs 25 , 36-38 )

H o l o t y p e: USNM 502728 (= Woodruff #5501), amber, Dominican Republic, Early Miocene (Burdigalian).

D i a g n o s i s Body distinctly dorso-ventrally compressed, less than 2.0 mm in height, with sparse setae scattered throughout ( Fig. 25 ). Compound eyes subcircular. Rostrum narrow, subequal in width along entire length, and elongate ( Figs 36, 38 ), longer than length of pronotum, rugose. Width of metepisternum less than width of antennal club, with one longitudinal row of minute punctures. Femora petiolate basally ( Fig. 37 ).

D e s c r i p t i o n: Total body length (including rostrum) ca. 2.67 mm; maximal width ca. 0.42 mm; elytral length ca. 1.29 mm. Integument black (as preserved). Body dorso-ventrally compressed. Compound eyes subcircular, length approximately equal to width; interocular distance approximately equal to width of rostrum at mid-length in dorsal view; interocular area with few elongate setae. Rostrum heavily rugose, with a few scattered elongate, fine setae apically, small scale-like setae scattered sparsely along rostrum; rostrum approximately 1.2✕ length of pronotum; ventral margin broadly and uniformly curved along entire length in lateral view ( Fig. 36 ); rostrum width narrow, subequal along length, widened very slightly apically in dorsal view. Antenna inserted slightly beyond basal one-third of rostrum; scrobe long, well-developed, extending just before compound eye; scape just reaching anterior margin of compound eye; scape approximately one-half length of rostrum; funicle 7-segmented, narrow, enlarging to a distinct, setose club. Vertex glabrous, heavily sculptured with irregular punctures and rugose. Pronotum with sparse covering of short, scale-like setae, length approximately 1.8✕ width; anterior portion narrower than posterior portion; heavily rugose and irregularly punctate; lateral margins broadly rounded. Prosternum not visible; however, procoxae obviously distanced equal to or more than one length of coxa. Scutellum ovoid. Elytra with sparse covering of short, fine setae; each elytron with approximately eight striae; punctures of elytral striae moderately deep, separated by distance approximately 0.5-1✕ puncture diameter; humeri subquadrate. Metepisternum narrower than width of antennal club, with a single, distinct, longitudinal row of minute punctures. Metasternum and abdominal ventrites not visible. Femora elongate, petiolate ( Fig. 37 ), expanding slightly apically and punctate; profemora markedly petiolate; tibiae slightly laterally expanded apically; apical tibial unci at outer angle small, approximately equal to or slightly longer than length of pretarsal claw; no other smaller denticles present apically.

E t y m o l o g y: The specific epithet is a combination of the Latin words longus (meaning "long") and rostrum (meaning "snout") and is a reference to the more elongate rostrum relative to modern species.

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Figures

Figs 23-28: Photomicrographs of Dominican amber cossonine weevils. (23) holotype of Caulophilus swensoni nov.sp. (USNM 502877); (24) paratype of C. swensoni (USNM 502666); (25) holotype of Proeces longirostrum nov.sp. (USNM 502728); (26) holotype of Stenotrupis breviscapus nov.sp. (USNM 505344); (27) holotype of Cossonus hinojosai nov.sp. (USNM 505580), dorsal aspect; (28) holotype of C. hinojosai, lateral aspect.

Figs 29-38: Two species of Dryotribini, Dryotribus amplioculus nov.sp. (holotype, USNM 505329) and Paralicus abnormis nov.sp. (holotype, USNM 505350), and one of Proecini, Proeces longirostrum nov.sp. (holotype, USNM 502728). (29) dorsal oblique aspect of head and anterior pronotum of D. amplioculus; (30) protibia, profemur, protarsus, and pro-pretarsus of D. amplioculus; (31) ventrolateral oblique view of prothorax of D. amplioculus depicting position of procoxae; (32) lateral aspect of head of P. abnormis; (33) dorsal aspect of head of P. abnormis; (34) protibia, profemur, protarsus, and pro-pretarsus of P. abnormis; (35) ventral aspect of prothorax of P. abnormis depicting position of procoxae; (36) Lateral aspect of head of P. longirostrum; (37) protibia, profemur, protarsus, and pro-pretarsus of P. longirostrum; (38) dorsal oblique aspect of head of P. longirostrum. All drawn as preserved.