Cossonine weevils in Dominican amber (Coleoptera: Curculionidae) Author Davis, S. R. Author Engel, M. S. text Linzer biologische Beiträge 2007 2007-12-18 39 2 803 820 journal article 10.5281/zenodo.13135896 0253-116X 13135896 Dryotribus amplioculus nov.sp. ( Figs 29-31 ) H o l o t y p e: USNM 505329 (= Woodruff #9778), amber, Dominican Republic , Early Miocene (Burdigalian). D i a g n o s i s Head distinctly constricted behind compound eyes; compound eyes situated at base of rostrum, bulging and subcircular ( Fig. 29 ). Vertex with a shallow, rounded groove ( Fig. 29 ). Pronotum with large, deep punctures; smaller and more sparse punctures anteriorly. Elytra with approximately 10 striae, with elytral striae small, shallow, and sparsely distanced. Venter heavily punctate. Profemora enlarged; tibiae bearing a large uncus on outer angle ( Fig. 30 ); opposite of uncus at inner angle a smaller, less conspicuous denticle. D e s c r i p t i o n: Total body length (including rostrum) ca. 1.88 mm ; maximal width ca. 0.52 mm ; elytral length ca. 0.71 mm (as preserved, apex of abdomen missing). Integument dark brown to black (as preserved). Compound eyes bulging and subcircular ( Fig. 29 ), length approximately equal to width; positioned at base of rostrum; interocular distance approximately equal to width of rostrum in dorsal view. Rostrum puncticulate and slightly longer than length of pronotum; ventral margin moderately curved in lateral view ( Fig. 29 ), with curvature mostly at basal half; rostrum width widened along apical half in dorsal view. Antenna inserted at mid-length of rostrum, scrobe shallow; scape reaching middle of compound eye; scape more or less one-third length of rostrum; funicle narrow, enlarging to a distinct club. Vertex smooth and glabrous, with a shallow depression. Pronotum glabrous, length approximately 1.3✕ width; anterior portion narrower than posterior portion; large, deep punctures present, punctures separated by distance 1-4✕ puncture diameter; punctures smaller and sparser anteriorly; lateral margins broadly rounded. Prosternum without shallow depression between procoxae; large, deep punctures present, punctures separated by distance 0.5-1✕ puncture diameter; coxal positions as in figure 31. Scutellum triangular, small, length slightly less than anterior basal width. Elytra each with approximately 9-10 striae; punctures of elytral striae small and shallow, separated by distance approximately 2-4✕ puncture diameter; humeri rounded. Abdominal ventrites with large, deep punctures present, punctures separated by distance 0.5-1✕ puncture diameterx. Femora clavate and puncticulate; profemora enlarged ( Fig. 30 ); tibiae laterally expanded apically; apical tibial unci at outer angle large, approximately equal or slightly longer than length of tarsomere IV; a small denticle present on opposite side of uncus on inner angle, length equal to or slightly less than pretarsal claw length. E t y m o l o g y: The specific epithet is a combination of the Latin terms amplio (meaning "enlarge") and oculus (meaning "eye") and is a reference to the large, bulging compound eyes. C o m m e n t s: This species is differentiated from extant congeners by the shallow depression on the vertex of the head; the relatively large, bulging compound eyes; the distance separating the pronotal punctures; the number of elytral striae; and the distance 809 separating the elytral striae. Other species of Dryotribus have a heavily punctate integument; however, the distance separating the punctures varies between species.