Eocorythoderus new genus

(Figs. 1–7)

Type species. Eocorythoderus incredibilis new species, here designated.

Etymology. A combination of Eos, the Greek goddess of the dawn, and Corythoderus, the type genus of Corythoderini, in reference to the new taxon having the eastern-most distribution of the genera in the tribe. Gender: masculine.

Diagnosis. The combination of the following character states diagnose Eocorythoderus: (1) body distinctly panduriform; (2) clypeal margin rounded; (3) eyes small, dorsally invisible; (4) pronotum with a pair of shallow depressions medially, (5) pronotum without median sulcus; (6) pronotum without trichome; (7) elytron with base of first and second intervals strongly elevated, to form a large median dorsal projection (Fig. 2: arrow); (8) elytron with basal knob-shaped protrusion; (9) elytron with 5 striae; (10) mesocoxal cavities widely separated; (11) mesolegs distinctly longer than others; (12, 13) mesofemora and metafemora broad, oval; (14, 15) mesotibiae and metatibiae narrowed apically.

Description. Body (Figs. 1–7) short, distinctly panduriform. Head (Figs. 1–3) slightly convex above; clypeus with gently broadened lateral margins; anterior margin rounded, slightly reflexed along anterior margin; eyes (Fig. 4) small, dorsally invisible. Pronotum (Figs. 1–3) strongly convex above, much higher than length; posterior impression shallow, short, extending from middle to base of median lobe; with a pair or shallow depressions medially; median lobe triangular, with dense setiferous punctures except for mesal area. Elytra (Figs. 1, 2) short, oval, strongly convex dorsally, but lower than pronotum; disc with 5 striae; each elytron with large basal elevation on intervals I and II to form median projection, which is densely covered with small trichomes at apex; base of intervals III-V with two rather low tubercles to form basal knob-shaped protrusion. Mesoventrite (Fig. 4) with intercoxal area broad, distinctly margined laterally. Metaventrite (Fig. 4) short, much shorter than mesoventrite. Proleg (Fig. 4) short; femur oblong oval; tibia short, bidentate near apex; tarsus slightly dilated apicad. Mesoleg (Fig. 4) stout, long, longer than metaleg; femur oval, broad, flattened, with posterior sulcus to hold tibia; tibia dilated apicad; tarsus narrowed apicad. Metaleg (Fig. 4) similar in shape to mesoleg, but shorter; femur slightly constricted near base. Pygidium (Fig. 4) with a pair of shallow depressions (perhaps this character is sexual dimorphic).