Pocadius cochabambus Cline

Cline, Andrew R., 2008, Revision of the sap beetle genus Pocadius Erichson, 1843 (Coleoptera: Nitidulidae: Nitidulinae, Zootaxa 1799 (1), pp. 1-120: 46-47

publication ID

http://doi.org/ 10.11646/zootaxa.1799.1.1



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scientific name

Pocadius cochabambus Cline

new species

Pocadius cochabambus Cline   new species

(Figs. 10, 51, 93, 136, 179)

Specimens examined. HOLOTYPE ♂ ( CMN): BOLIVIA: Cochabamba; Cochabamba, 67.5km NE Est. Biol.; Valle del Sajita, Univ. De San Simon ; 300m, 17°6’33”S 64°47’52”W; 7-9-II-1999, R. Hanley, ex. flight; intercept trap, BOL1H99 057 GoogleMaps   / HOLOTYPE; Pocadius   ; cochabambus; A. R. Cline des. 2004   .

Diagnosis. Similar to P. ashei   , but differs from it and other species by: antennal club greatly widened with large oblong depressed region on terminal antennomere; habitus dull, surface entirely alutaceous to granular; tibial spines elongate; elytral fimbria elongate; densely punctured pronotum; serial row of small punctures on elytra sometimes with multiple punctures not just single row; high W:L ratio (3.2:1) of metaventrite; tegmen with incomplete row of inner setae; basal piece of internal sac sclerites with U-shaped curved structure and median section with elongate blunt process.

Description. Length 3.45mm, Width 2.25mm, Depth 1.05mm. Body moderately convex, dull, light brown. Pronotum and elytra margins with elongate fimbriae. Dorsal and ventral pubescence elongate, golden.

Head surface deeply, densely, irregularly punctate with large and small punctures, becoming smaller towards orbits, occiput and fronotclypeal region. Large punctures 4–5X diameter of eye facet, small punctures 1–2X diameter; interspaces alutaceous to granular. Pronotal surface with large punctures equal to large ones on head, interspersed with small punctures, 0.5 diameter large ones; interspaces alutaceous, 0.25–0.5 large diameter apart. Scutellar surface with shallow punctures equal to small ones on pronotum, interspaces granular. Elytral surface with serial rows of small punctures equal to smaller ones on pronotum, serial large punctures 2–2.5X diameter small ones. Small serial punctures giving rise to elongate erect long setae, large serial punctures giving rise to decumbent/adpressed moderately long setae that are shorter than serial small puncture setae; interspaces broad between punctures of a given row and different rows. Within a row, small punctures separated by 2 diameters, large punctures by 1 diameter. Large rows separated by 2 diameters; interspaces alutaceous to granular. Pygidium densely punctate, punctures equal to small ones on pronotum, interspaces narrow, <0.5 diameter apart, granular.

Venter with similar long pubescence as dorsum. Mentum with shallow punctures, equal to small ones on vertex, interspaces granular. Prosternum and epimeron moderately impressed with irregular punctures, punctures 2X larger than those on mentum with epimeron punctures larger than those on prosternum, interspaces granular with microreticulation, prosternal punctures separated by 0.5 diameter, those on epimeron by 0.25– 0.5 diameter. Mesoventrite with shallow punctures, subequal to those on prosternum, interspaces alutaceous to granular, separated by 0.5 diameter. Metaventrite irregularly punctate with moderately impressed punctures on disc similar to those on mesoventrite, interspaces granular on disc becoming microreticulate laterally, punctures separated by 1–2 diameters. Metepisternum deeply punctate with large irregular punctures, 2X larger than those on metasternal disc. Abdominal sternite 1 with faint punctures, equal to those on metasternal disc, interspaces alutaceous to granular, separated by 1 diameter. Hypopygidium with moderately deep punctures, similar to those on sternites 2–4, interspaces granular with microreticulation, punctures separated by 0.5 diameter.

Head wider than long (W:L = 1.26:1). Antennal club compact, greatly widened apically, asymmetrical with terminal antennomere longer than 9–10 combined. Antennomeres 4–8 compact, 6–8 disc-like, 4–5 cuboidal to trapezoidal. Antennal scape asymmetrical, hemispherical, 1.8X length of pedicel. Pedicel subcylindrical. Antennal segment 3 elongate, 0.85 length of pedicel. Antennal club large, 0.75 length of segments 1–8 combined. Mentum with anterior angles visible, anterior margin angulate, overall pentagonal, slightly convex in lateral view.

Pronotum widest near posterior angles (L:W = 1:2), anterior margin broadly concave, lateral margins not distinctly arcuate. Scutellum large, obtusely triangular, apex rounded. Prosternal process in lateral view with even convexity over procoxae; posterior face prominent and oblique. Metaventrite much wider than long (W:L = 3.2:1). Metepisternum with slight medial constriction, oblique line dividing anterior 0.18. First abdominal sternite with broad process between metacoxae. First sternite 2X longer than sternite 2. Sternites 2–3 subequal, 4 slightly larger than 2 or 3. Hypopygidium subequal to sternite 1.

Protibia with apical tooth prominent, slightly longer than tarsomere 1. Outer apical notch with 135° angle, notch depth shallow, equal to 0.33 of tarsomere 1. Inner apical spine subequal to tarsomeres 1–2 combined. Mesotibia more heavily armed than protibia with dense stiff setae and slender spines along lateral edge. Outer apical process robust, equal to protibial process. Inner apical spine equal to tarsomeres 1–2 and part of 3 combined. Metatibia with armature similar to mesotibia, apical spine equal to tarsomeres 1–2 combined.

Male genitalia well-sclerotized. Anal sclerite with elongate dense fimbriae (Fig. 10). Spiculum gastrale with wide lateral flanges, moderately long stiff setae at apex (Fig. 51). Tegmen broadly rounded (Fig. 93), longer than wide (w:l = 1:3), lateral row of setae visible from median fossa to prior to apex, inner row of setae incomplete, small shallow concavity in apical 0.33. Median lobe large and robust, 0.66 length of tegmen, rounded, apical opening well-developed (Fig. 136). Ejaculatory rods not fused to basal piece or each other, curved inward and expanded outward (Fig. 179).

Variation. No variation observed.

Seasonality/Habitat. Collected in early February from lowland forest.

Distribution. Known from type locality in western Bolivia.

Notes. No host data available.

Etymology. Specific epithet is a derivative of the type locality, i.e. Cochabamba, Bolivia.


Canadian Museum of Nature


Departamento de Geologia, Universidad de Chile