Pocadius barclayi Cline, 2008

Cline, Andrew R., 2008, Revision of the sap beetle genus Pocadius Erichson, 1843 (Coleoptera: Nitidulidae: Nitidulinae, Zootaxa 1799 (1), pp. 1-120 : 33-36

Pocadius barclayi Cline new species

(Figs. 5, 46, 88, 131, 174, 213)

Specimens examined. HOLOTYPE ♂ ( BMNH): INDONESIA:; SULAWESI UTARA,; Dumoga-Bone N.P.; 25 February 1985. / Flight; interception; trap 1 / Plot A, ca 200m; Lowland forest / [upside down] R.Ent.Soc.Lond.; PROJECT WALLACE; B.M. 1985-10 / HOLOTYPE; Pocadius ; barclayi; A. R. Cline des. 2004. 1 PARATYPE ( BMNH) : same data labels as holotype but 24 February 1985, and also having a pink colored label with number 80.5. 1 PARATYPE ( BMNH) : same data labels as holotype but 26 February 1985. 1 PARATYPE ( ARCC) : same data labels as holotype but April 1985. 1 PARATYPE ( BMNH): INDONESIA:; SULAWESI UTARA,; Dumoga-Bone N.P.; 9-16 May 1985 / Lowland forest ; edge ca 200m / malaise; trap / [upside down] R.Ent.Soc.Lond.; PROJECT WALLACE; B.M. 1985-10. 2 PARATYPES (1 BMNH, 1 ARCC): INDONESIA; SULAWESI UTARA; Gng. Ambang F. R.; nr. Kotamobagu; Jan. 1985 / Lower montane; forest; 1200–1400m / in mature puffballs / [upside down] R.Ent.Soc.Lond.; PROJECT WALLACE; B.M. 1985-10 .

Diagnosis. Similar to P.martini from the Philippines but differs from it and others by: surface with granular sculpture; metaventrite with small densely distributed punctures on disc becoming greatly enlarged and more widely spaced laterally; terminal antennomere more than twice as long as previous two segments combined; mesoventrite distinctly carinate along midline; elevated region of mentum hemispherical; pronotum

with anterior margin broadly concave; scutellum comparatively large to body size; tarsomeres greatly thickened with relatively few setae; tegmen elongate; median lobe elongate with complex apical opening; internal sac with ejaculatory rods adjacent and large basal piece with small lunate lateral accessory pieces; ovipositor with sharp medial gonocoxal incision and numerous apical setae.

Description. Length 3.4mm, Width 2.0mm, Depth 1.4mm. Body moderately convex, surface shining, light brown to brown, elytral apices darker or body uniformly dark brown with legs lighter. Pronotal and elytral fimbriae short, setae subequal to antennal scape. Dorsal and ventral pubescence short and inconspicuous.

Head surface shallowly, irregularly punctate, large and small punctures interspersed. Large punctures 3– 4X diameter of eye facet, small punctures 2X diameter; interspaces alutaceous to granular. Pronotal surface with large and small interspersed punctures, equal to large and small punctures on vertex; interspaces alutaceous to granular, 0.5–1 diameter apart. Scutellar surface with few shallowly impressed punctures; interspaces granular. Elytral surface with serial rows of small punctures equal to larger ones on pronotum, serial larger punctures 1.5X diameter of small ones. Small punctures giving rise to semi-erect, oblique short setae, large punctures giving rise to decumbent short setae; interspaces narrow between punctures of a row and between different rows. Within a row, small punctures separated by 0.5 diameter, large punctures by 0.25 diameter. Large rows separated by 1 diameter; interspaces moderately shining, mostly granular. Pygidium densely punctate, punctures equal to larger ones on pronotum; interspaces narrow, 0.5 diameter apart, alutaceous to granular.

Venter with similar short sparse pubescence as dorsum. Mentum with moderately impressed punctures, equal to larger ones on vertex; interspaces alutaceous to granular with some microreticulation. Prosternum and epimeron with moderately impressed irregular punctures, punctures equal to those on mentum, interspaces granular with microreticulation, prosternal punctures separated by 0.25–0.5 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 1 diameter, most punctures aggregated near metasternal border. Metaventrite irregularly punctate, moderately impressed punctures on disc similar to those on mesoventrite, interspaces granular, punctures separated by 1 diameter, lateral punctures 3–3.5X diameter of those on metasternal disc. Abdominal sternite 1 with faint, obsolete punctures, punctures equal to those on metasternal disc, interspaces alutaceous to granular, separated by 1–2 diameters. Hypopygidium with moderately deep punctures, similar to those on sternites 2–4, interspaces mostly granular, separated by 1 diameter.

Head transverse, wider than long (W:L = 1.5:1). Antennal club compact, circular to oblong, asymmetrical, with terminal antennomere 2X length of 9–10 combined. Antennomeres 4–8 compact, 4–5 trapezoidal, and 6– 8 disc-like. Antennal scape asymmetrical, greatly hemispherical, 1.8X length of pedicel. Pedicel cylindrical. Antennal segment 3 equal to pedicel. Antennal club large, 0.65 length of segments 1–8 combined. Elevated region of mentum with anterior angles obsolete, broadly hemispherical, somewhat convex in lateral view.

Pronotum widest near middle (L:W = 1:1.83), anterior margin broadly shallowly concave, lateral margins less arcuate posteriorly. Scutellum large, oblong and broadly hemispherical, apex broadly rounded. Prosternal process in lateral view with anterior half steeply sloped, posterior half flattened into short shelf, and moderate convexity over procoxae; posterior face prominent, slightly oblique. Mesoventrite extending to midway between mesocoxae, deeply evenly concave for reception of metaventrite, distinct longitudinal median carina present. Metaventrite wider than long (W:L = 2.25:1). Metepisternum with medial constriction, oblique line separating anterior 0.2. Abdominal sternite 1 with broad process between metacoxae. First sternite 2X longer than sternite 2. Sternites 2–4 subequal. Hypopygidium subequal to sternite 1.

Protibia with apical tooth prominent, slightly longer than tarsomere 1. Outer apical notch with 100° angle, notch depth shallow, equal to 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 not prominent, subequal to protibial process. Inner apical spine equal to tarsomeres 1–2 and part of 3 combined. Metatibia with armature similar to mesotibia, apical spine more elongate and robust.

Male genitalia well-sclerotized. Anal sclerite distinctly prolonged; apex fimbriate (Fig. 5). Spiculum gastrale with broad lateral flanges, medial margins parallel, elongate setae originating from apex (Fig. 46). Tegmen narrowly rounded (Fig. 88), longer than wide (w:l = 1:3.85), lateral row of setae visible from median fossa to prior to apex, elongate oval concavity in apical 0.33, median fossa elongate. Median lobe elongate, equal to tegmen, apex acuminate, apical opening well-developed (Fig. 131). Ejaculatory rods not fused to basal piece, basal piece with small lateral projections and lunate baso-lateral accessory pieces (Fig. 174).

Female genitalia moderately sclerotized. Paraprocts large with sclerotization along median line. Gonocoxite with one basal lateral prominence, basal ridge with two elongate oblique baculi. Gonocoxal apices with recurved “tooth” absent. Four to five setae originate from small depressions on gonocoxal apices (Fig. 213).

Variation. Specimen collected in March smaller than others. Specimens collected from Ambang F.R. completely dark brown without darker elytral apices.

Seasonality/Habitat. Specimens were collected in lowland wet forests from January to mid-May.

Distribution. Known from Utara (northern) region of Sulawesi (a.k.a. Celebes).

Notes. Host data is listed as “mature puffballs” for Ambang F.R. specimens.

Etymology. Specific epithet honors Maxwell Barclay from the Natural History Museum, London, for his patience and generosity during this study.