Pocadius bicolor Cline, 2008

Cline, Andrew R., 2008, Revision of the sap beetle genus Pocadius Erichson, 1843 (Coleoptera: Nitidulidae: Nitidulinae, Zootaxa 1799 (1), pp. 1-120 : 40-41

Pocadius bicolor Cline new species

(Fig. 215)

Specimens examined. HOLOTYPE ♀ ( CMN): BRAZIL: Para; Carajas, Serra; Norte , III-1985; 6 15’S 50 25’W; N. Degallier; FIT, carrion, dung.

Diagnosis. The bicolored habitus with pronotum distinctly lighter than body is unique.

Description. Length 2.7mm, Width 2.1mm, Depth 1.35mm. Body moderately convex, shining, pronotum and legs lighter than rest of body, pubescence light gold, pronotal and elytral fimbriae short and sparsely distributed along margins. Pygidium and hypopygidium densely deeply punctate.

Head surface densely irregularly punctate with small and large punctures, interspaces smooth to granular, 0.5 diameter apart. Large punctures 4X eye facet diameter, small punctures 0.5 diameter of large puncture. Pronotal surface with large and small punctures interspersed, similar to large and small punctures on head; interspaces 1–2 diameters apart, alutaceous to granular. Scutellar surface faintly punctate, similar to small punctures on pronotum, interspaces granular to finely microreticulate, separated by 1–1.5 diameter. Serial large punctures on elytra 1.5X diameter of large punctures on head, giving rise to decumbent setae. Small punctures 0.5 diameter of large punctures, giving rise to erect setae; interspaces alutaceous to finely microreticulate, large punctures separated by 1 diameter, small punctures separated by 1–2 diameters. Large and small puncture rows separated by 1 small puncture diameter. Pygidium densely irregularly punctate, subequal to small punctures on elytra, interspaces rugose with microreticulation, separated by 0.25–0.5 diameter.

Venter less pubescent than dorsum, except abdominal segments. Mentum with few faintly impressed minute punctures, subequal to small punctures on vertex, interspaces smooth to faintly alutaceous, 1 diameter apart. Prosternum and epimeron deeply impressed with large punctures, punctures similar to large ones on pronotum, interspaces alutaceous with microreticulation, 0.25–0.5 diameter apart. Mesoventrite with punctures dispersed, 0.5–0.75 diameter of prosternal punctures, interspaces alutaceous to rugose. Metasternal disc faintly punctate with small punctures, 0.5 diameter of prosternal punctures, interspaces smooth to alutaceous, more rugose laterally. Abdominal sternite 1 with moderately impressed punctures, 1.5–2 diameter of those on metasternal disc, interspaces alutaceous to rugose, separated by 1 diameter, abdominal process with microreticulation. Hypopygidium densely deeply punctate, punctures equal to those on metasternal disc, interspaces rugose with faint microreticulation, separated by 0.5 diameter.

Head wider than long (W:L = 1.5:1). Antennal club compact, large, ovate, asymmetrical with terminal antennomere longer than 9–10 combined, club subequal to antennomeres 1–8 combined. Terminal antenno- mere with distinct depressed U-shaped region extending across apex. Antennomeres 6–8 flattened, combined length slightly longer than antennomere 9. Antennal scape asymmetrical, broadly hemispherical, 1.2X longer than pedicel. Pedicel cylindrical. Antennomere 3 subequal to pedicel, narrowed proximally. Segment 4 cuboidal, 5 trapezoidal. Elevated region of mentum pentagonal, convex in lateral view.

Prosternal process in lateral view evenly rounded over procoxae with flattened posterior declivity; posterior face oblique. Mesoventrite extending to anterior 0.33 of mesocoxae with broadly concave apex. Metaventrite wider than long (W:L = 3.33:1). Metepisternum rather broad and well-developed, moderately concave medially, axillary space impunctate 0.15 length of entire structure. First abdominal sternite with narrowly rounded process between metacoxae, 2X longer than sternite 2. Sternites 2–4 subequal. Hypopygidium subequal to sternite 1.

Protibia with apical tooth as long as tarsomeres 1–2 combined. Outer apical notch with 85° angle. Inner apical spine subequal to tarsomeres 1–2 combined. Mesotibia armed with slender spines along lateral edge, spines 0.75 length of lateral setae on mesotibia; apical border armed with 2–3 short spines, 0.5 length of lateral spine; outer apical process robust, subequal to length of inner apical spine; inner apical spine equal to tarsomeres 1–2.5 combined. Metatibia more heavily armed than mesotibia, lateral spines more elongate and numerous.

Ovipositor moderately sclerotized. Gonocoxite with well-sclerotized basal border with two lateral prominences. Gonocoxal apices narrowly separated with intragonocoxal invagination acute basally, gonocoxal tips broadly rounded at apex, each apex with lateral recurved “tooth” absent, apical pits with 2 elongate setae (Fig. 215).

Etymology. Specific epithet denotes the distinctive bicolored habitus.

Variation. Known from the holotype.

Seasonality/Habitat. Holotype collected in March in equatorial Brazil.

Distribution. Known from the type locality.

Notes. No fungal host data available.