Pocadius femoralis Cline, 2008

Cline, Andrew R., 2008, Revision of the sap beetle genus Pocadius Erichson, 1843 (Coleoptera: Nitidulidae: Nitidulinae, Zootaxa 1799 (1), pp. 1-120 : 63-64

Pocadius femoralis Cline new species

(Figs. 225, 257)

Specimens examined. HOLOTYPE ♀ ( SNEC): VIETNAM: Dong Nai; Cat Tien National Park , near Park Hqtrs.; 11°2f5’23”N, 107°25’41”E, 120m; 27–31 MAY 1999, B. Hubley, N. Tatmic; VIET1 H95-99 039, ex. malaise trap / SM0189129 ; KUNHM-ENT [bar code label] / HOLOTYPE; Pocadius ; femoralis; A. R. Cline des. 2004 .

Diagnosis. Similar to P. decoratus and P. martini from SE Asia; diagnosed by: small compact body; femora and tibia dark brown-black; integument dull; scutellum hemispherical; abdominal process broad; metasternal disc with few minute punctures; outer protibial notch deep; prosternal process expanded laterally posterior to procoxae; ovipositor with greatly reduced gonocoxal extensions.

Description. Length 3.0mm, Width 2.0mm, Depth 1.2mm. Body moderately convex; faintly shining; head, prosternum, sides of pronotum, elytral apices and legs dark brown/black with rest of body light redbrown. Pronotal and elytral margins with short fimbriae. Dorsal and ventral pubescence golden, moderately long and fine.

Head surface densely, deeply, irregularly punctate, punctures larger on vertex, becoming smaller towards orbits and fronotclypeal region, small punctures not on vertex. Large punctures 4–5X diameter of eye facet, small punctures 2X diameter; interspaces smooth to finely alutaceous. Pronotal surface with large punctures equal to large punctures on head, interspersed with few small punctures, 0.33 diameter large ones, small punctures in close proximity to anterior margin of large ones; interspaces alutaceous, 1–1.5 diameters apart. Scutellar surface with few shallowly impressed small punctures, equal to small ones on pronotum, interspaces alutaceous to granular. Elytral surface with serial rows of smaller punctures equal to small ones on pronotum, large punctures 2.5X diameter of small ones. Small punctures giving rise to erect long setae, large punctures to shorter decumbent setae; interspaces narrow between punctures of a row and between different rows. Within a row, small punctures separated by 1 diameter, large punctures by 0.25 diameter. Large rows separated by 0.75–1 diameter; interspaces alutaceous to granular with fine microreticulation. Pygidium densely punctate, punctures equal to large ones on pronotum; interspaces narrow, 0.25 diameter apart, granular.

Venter with similar pubescence as dorsum. Mentum with minute shallow punctures, equal to small ones on head, interspaces granular. Prosternum and epimeron deeply irregularly punctate, punctures equal to large ones on head, punctures on epimeron smaller than on prosternum, interspaces alutaceous to granular with some microreticulation, prosternal punctures 0.5–1 diameter apart, those on epimeron by 0.25 diameter. Mesoventrite with shallow punctures aggregated near metaventrite, equal to larger ones on vertex, interspaces alutaceous to granular, separated by 0.5 diameter. Metaventrite with faint irregular punctures on disc similar to small ones on head, interspaces smooth on disc becoming microreticulate and granular laterally, punctures separated by 1–2 diameters on disc and more densely aggregated laterally. Abdominal sternite 1 with large faint punctures, equal to large ones on head, interspaces alutaceous with microreticulate regions, 1 diameter apart. 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 (W:L = 1.5:1). Antennal club compact, oval, slightly asymmetrical with terminal antennomere slightly longer than 9–10 combined. Antennomeres 4–8 compact, 7–8 disc-like, 4–6 trapezoidal. Antennal scape asymmetrical, hemispherical, 1.5X length of pedicel. Pedicel barrel-like. Antennal segment 3 equal to pedicel. Antennal club large, 0.9 length of segments 1–8 combined. Elevated region of mentum with anterior angles obsolete, anterior margin broadly rounded, overall transversely hemispherical, convex in lateral view.

Pronotum widest near posterior angles (L:W = 1:2), anterior margin broadly shallowly concave, lateral margins slightly arcuate to anterior angles. Scutellum large, obtusely hemispherical, apical angle obsolete. Prosternal process widely expanded posterior to procoxal cavities, in lateral view flattened with slight convexity over procoxae; posterior face perpendicular. Mesoventrite extending to midway between mesocoxae, evenly convex for reception of metaventrite. Metaventrite wider than long (W:L = 3.2:1). Metepisternum with slight medial constriction, oblique line dividing anterior 0.1. 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 85° angle, notch depth deep, equal to tarsomeres 1–2 combined. Inner apical spine short, subequal to tarsomere 1. Mesotibia more heavily armed than protibia with dense stiff setae and slender spines along lateral edge. Outer apical process elongate robust, larger than protibial process. Inner apical spine equal to tarsomeres 1–2 combined. Metatibia similar to mesotibia, outer apical process and inner apical spine longer and more robust.

Female genitalia moderately sclerotized (Fig. 225). Paraprocts elongate with sclerotization along median line, not extending to baso-lateral angles. Gonocoxite with one basal lateral prominence, basal ridge well-sclerotized with two short oblique baculi. Gonocoxal apices reduced, narrowly separated by concavity. Two elongate setae originate from small depressions near gonocoxal apices.

Variation. No variation observed.

Seasonality/Habitat. Collected from late May in forested region.

Distribution. Known from type locality in southern Vietnam.

Notes. No fungal host data available.

Etymology. Specific epithet denotes distinctive darkened femora.