Pocadius fusiformis Cline

Cline, Andrew R., 2008, Revision of the sap beetle genus Pocadius Erichson, 1843 (Coleoptera: Nitidulidae: Nitidulinae, Zootaxa 1799 (1), pp. 1-120: 70-71

publication ID

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

persistent identifier


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scientific name

Pocadius fusiformis Cline

new species

Pocadius fusiformis Cline   new species

(Figs. 22, 63, 106, 149, 191, 229)

Specimens examined. HOLOTYPE ♂ ( BMNH): INDONESIA; SULAWESI UTARA; Danau Mooat 1200m.; nr. Kotamobagu; 16 Feb. 1985 / Lower montane; forest; 1200–1400m / puffballs   / HOLOTYPE; Pocadius   ; fusiformis; A. Cline des. 2004. 1 PARATYPE ♂ ( ARCC): same data as holotype   . 3 PARATYPES ♀ (2 BMNH, 1 ARCC): INDONESIA; SULAWESI UTARA; Gng. Ambang F. R.; nr. Kotamobagu; Jan. 1985 / Lower montane; forest; 1200–1400m / in mature puffballs. All specimens have a label turned upside down under the other labels, prior to type labels with the following: R. Ent. Soc. Lond.; PROJECT WALLACE; B.M. 1985-10. One female paratype collected in January has an additional label: 2 examples in; Mus. Bogoriense   .

Diagnosis. Distinguished from other Old World species by: color pattern consisting of dark brown-black scutellum, pronotal disc, and elytra except for anterior-medial 0.25 with rest of body light tan-brown; short decumbent elytral pubescence; greatly enlarged terminal antennomere; swollen/thickened tarsomeres; anal sclerite with acute apical point; elongate narrow tegmen and median lobe; ejaculatory rods with convex distal region; ovipositor gonocoxites without apical tooth and broadly rounded baso-lateral angles.

Description. Length 4.1mm, Width 2.3mm, Depth 1.5mm. Body moderately convex, shining, dark brown/black with elytral humeri, lateral pronotal margins, anterior half of head, venter, and appendages lighter. Pronotal and elytral margins with short fimbriae. Dorsal and ventral pubescence short and fine, light yellow.

Head surface moderately deeply, irregularly punctate, punctures large on vertex with few interspersed smaller punctures, becoming smaller towards orbits and fronotclypeal region. Large punctures 3–4X diameter of eye facet, smaller punctures 2X diameter; interspaces smooth with some microreticulation present, shining. Pronotal surface with large punctures equal to large punctures on head, interspersed with few small punctures, equal to small ones on head; interspaces smooth with areas of fine microreticulation, 1–2 diameters apart. Scutellar surface with few, shallowly impressed small punctures, equal to small ones on vertex, interspaces smooth with fine microreticulate areas. Elytral surface with serial rows of smaller punctures equal to small ones on pronotum, large serial punctures 3X diameter of small ones. Small punctures giving rise to decumbent short setae, large punctures giving rise to short decumbent setae; interspaces broad between punctures of a row and between different rows. Within a row, small punctures separated by 2–3 diameters, and large punctures by 1 diameter. Large rows separated by 2 large diameters; interspaces shining but variable from smooth to finely microreticulate. Pygidium densely punctate, equal to large ones on pronotum; interspaces narrow, 0.25–0.5 diameter, shining, heavily microreticulate.

Venter with similar short pubescence as dorsum. Mentum with few large shallow punctures, equal to large ones on head, interspaces smooth to alutaceous and finely microreticulate. Prosternum and epimeron irregu- larly punctate, punctures moderately impressed, those on epimeron equal to large punctures on elytra and those on prosternum to small elytral punctures, interspaces alutaceous with microreticulate areas, prosternal punctures separated by 0.5 diameter, those on epimeron by 0.25 diameter. Mesoventrite with shallow punctures, 0.75 diameter of those on epimeron, interspaces alutaceous to somewhat granular, separated by 0.5–1 diameter, aggregated near metaventrite. Metaventrite densely irregularly punctate with faint punctures on disc similar to those on mesoventrite, interspaces granular on disc becoming microreticulate laterally, punctures separated by 0.5–1 diameter. Abdominal sternite 1 with large faint punctures equal to those on metasternal disc, interspaces granular with microreticulations, separated by 0.5–1 diameter. Hypopygidium with moderately deep punctures, similar to those on sternites 2–4, interspaces granular, separated by 0.25–0.5 diameter.

Head wider than long (L:W = 1:1.5). Antennal club compact, somewhat globular, asymmetrical with last antennomere longer than previous two combined. Antennomeres 4–8 compact, 7–8 disc-like and 4–6 trapezoidal. Antennal scape asymmetrical, somewhat hemispherical, 1.4X as long as pedicel. Pedicel subcylindrical. Antennal segment 3 subequal to pedicel. Antennal club large, 0.66 length of segments 1–8 combined. Lateral mental/submental ridge moderately prominent, at level of submentum, ridge with longitudinal microreticulations and the corresponding sulcus with minute punctures and granular sculpture. Mentum with anterior angles present, anterior margin angulate with acute apex, transversely pentagonal, convex in lateral view.

Pronotum widest near middle (L:W = 1:2), anterior margin vaguely trapezoidal, lateral margins slightly arcuate to anterior and posterior angles. Scutellum large, obtusely triangular, apex broadly rounded. Prosternal process in lateral view with posterior end prominent and slightly upturned, steeply convex medially; posterior apical wall prominent and perpendicular. Mesoventrite extending midway between mesocoxae, evenly concave for reception of metaventrite. Metaventrite wider than long (L:W = 1:2.9). Metepisternum with slight medial constriction, oblique line dividing anterior 0.125. 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 and part of 2 combined. Outer apical notch with 115° angle, notch depth shallow, equal to length of 0.5 tarsomere 1. Inner apical spine subequal to tarsomeres 1–2 combined. Mesotibia more heavily armed than protibia with more dense stiff setae and a row of numerous slender spines along entire lateral edge. Outer apical process moderate, subequal in length to that of protibia process. Inner apical spine equal in length to tarsomeres 1–2 combined. Metatibia with armature similar to that of mesotibia, but with inner apical spine equal to tarsomeres 1–2 and part of 3 combined.

Male genitalia well-sclerotized. Anal sclerite with apex sparsely fimbriate (Fig. 22). Spiculum gastrale with narrow lateral flanges curved apically, medial margins biconcave, moderately long stiff setae apically (Fig. 63). Tegmen evenly rounded (Fig. 106), much longer than wide (w:l = 1:3.7), lateral row of setae visible from median fossa to prior to apex, small shallow concavity in apical 0.33, inner row of setae incomplete not attaining apex. Median lobe elongate, 0.85 length of tegmen, apex rounded, apical opening well-developed (Fig. 149). Ejaculatory rods not fused to basal piece or each other but adjacent to one another along entire length, both rods swollen apically. Basal piece with two elongate apico-lateral extensions (Fig. 191).

Female genitalia moderately sclerotized. Paraprocts large with sclerotization along median line to apico-lateral angles. Gonocoxite with no basal lateral prominences. Gonocoxal apices with recurved “tooth” absent. Four long setae originate from small depressions at gonocoxal apices. Intragonocoxal invagination shallow, <0.25 length of gonocoxite (Fig. 229).

Variation. Elytral and pronotal margin sometimes lighter. Females slightly larger than males.

Seasonality/Habitat. Collected in January–February from montane forests.

Distribution. Known from type locality on northern peninsula of Sulawesi, Indonesia.

Notes. Host information recorded as “puffballs.”

Etymology. Specific epithet denotes overall fusiform body shape.


Departamento de Geologia, Universidad de Chile