Pocadius crypsis Cline, 2008

Cline, Andrew R., 2008, Revision of the sap beetle genus Pocadius Erichson, 1843 (Coleoptera: Nitidulidae: Nitidulinae, Zootaxa 1799 (1), pp. 1-120 : 49-51

Pocadius crypsis Cline new species

(Figs. 12, 53, 95, 138, 181, 219, 253)

Specimens examined. HOLOTYPE ♂ ( SNEC): GUYANA: Region 8; Iwokrama Forest , Turtle Mt. Base; camp, 4°43’5”N 58°43’5”W, 50m; 1 JUN 2001, R. Brooks, Z. Falin; GUY1BF01 104, ex. in puffballs / SM0226858 ; KUNHM-ENT [barcode label] / HOLOTYPE; Pocadius ; crypsis; A. R. Cline des. 2004. 51 PARATYPES (36, 15 ARCC) with the same data label as the holotype but with PARATYPE designation labels and the following barcode numbers: SM0226877 , SM0226898 , SM0226847 , SM0386268 , SM0386267 , SM0226864 , SM0226855 , SM0226856 , SM0386265 , SM0226857 , SM0226853 , SM0226852 , SM0226851 , SM0226850 , SM0226849 , SM0226848 , SM0226861 , SM0226862 , SM0226863 , SM0226864 , SM0226865 , SM0226867 , SM0226866 , SM0226869 , SM0226897 , SM0226878 , SM0226876 , SM0226875 , SM0226896 , SM0226895 , SM 022688, SM0226884 , SM0226886 , SM0226882 , SM0226881 , SM0226879 , SM0226891 , SM0226892 , SM0226893 , SM0226860 , SM0226870 , SM0226871 , SM0226872 , SM0226873 , SM0226874 , SM0226868 , SM0226889 , SM0226894 , SM0226890 , SM0226887 , SM0226859 . 1 PARATYPE ( SNEC): GUYANA: Region 8; Iwokrama Forest, 1km W Kurupukari; Iwokrama Field Stn., 60m; 4°40’19”N 58°41’4”W, 28–29 MAY 2001; R. Brooks, Z. Falin, GUY1BF01 064; ex. flight intercept trap / SM0565301 ; KUNHM-ENT [barcode label] / PARATYPE; Pocadius ; crypsis; A. R. Cline des. 2004. 1 PARATYPE ( SNEC): GUYANA: Region 8; Iwokrama Forest, 1km W Kurupukari; Iwokrama Field Stn., 60m; 4°40’19”N 58°41’4”W, 21 MAY 2001; R. Brooks, Z. Falin, GUY1BF01 005; ex. Acromyrmex hystrix refuse pile / SM0568734 ; KUNHM-ENT [barcode label] / PARATYPE; Pocadius ; crypsis; A. R. Cline des. 2004. 1 PARATYPE ( SNEC): GUYANA: Region 8; Iwokrama Forest, Pakatau Hills; 70m, 4°44’54”N 59°1’36”W; 25–29 MAY 2001, R. Brooks; Z. Falin, GUY1BF01 061; ex. flight intercept trap / SM0569499 ; KUNHM- ENT [barcode label] / PARATYPE; Pocadius ; crypsis; A. R. Cline des. 2004 .

Diagnosis. Similar to P. coxus , but distinguished from it and other species by: deep distinct protibial notch and heavily armed tibiae; elevated region of mentum transversely hemispherical; alternating rows of erect and semi-erect setae on elytra; metasternal disc with minute faintly impressed punctures, appearing glabrous; body uniformly light tan; terminal antennomere enlarged with small circular depressed region; elytral fimbriae elongate; epimeron with two rows of large punctures; mentum with numerous large punctures; habitus shining; each ejaculatory rod split into two adjacent rods; basal piece of internal sac sclerites with two short lateral arms and simple medial section; anal sclerite with elongate fimbria; tegmen with inner row of setae

complete.

Description. Length 3.75mm, Width 2.25mm, Depth 1.35mm. Body moderately convex, shining, light brown. Pronotal and elytral margins with elongate fimbriae, elytral fimbria longer than pronotal fimbria. Dorsal and ventral pubescence elongate, red-brown.

Head surface deeply, densely, irregularly punctate, punctures larger on vertex, becoming smaller towards orbits and fronotclypeal region. Large punctures 4–5X diameter of eye facet, small punctures 2X diameter; interspaces shining with microreticulation. Pronotal surface with large punctures equal to large punctures on head, interspersed with few small punctures, 0.5 diameter large ones; interspaces smooth with fine microreticulation, 0.5–1 diameter apart. Scutellar surface with shallowly impressed small punctures, equal to small ones on pronotum, interspaces smooth to finely alutaceous. Elytral surface with serial rows of small punctures equal to those on pronotum, large serial punctures 2–2.5X diameter of small ones. Small serial punctures giving rise to erect long setae, large serial punctures giving rise to semi-erect long setae; interspaces broad between punctures of a row and between rows. Within a row, small punctures separated by 2–2.5 diameters, and large punctures by 0.75–1 diameter. Large rows separated by 1–1.5 large puncture diameters; interspaces shining, smooth to finely alutaceous. Pygidium densely punctate, punctures equal to large ones on pronotum, interspaces narrow, 0.25–0.5 diameter, smooth to finely alutaceous and faint areas of microreticulation.

Venter with similar long pubescence as dorsum. Mentum with large deeply impressed punctures, equal to larger ones on head, interspaces smooth with microreticulate areas. Prosternum and epimeron deeply punctate, punctures on epimeron larger than those on mentum, those on prosternum smaller than mental punctures, interspaces alutaceous with microreticulation, prosternal punctures separated by 0.5–1 diameter, those on epimeron by 0.25–0.5 diameter and organized into two rows. Mesoventrite with shallow punctures aggregated near metaventrite, equal to those on mentum, interspaces smooth to alutaceous, separated by 0.5–1 diameter. Metaventrite irregularly punctate, faint minute punctures on disc similar to small ones on head, lateral punctures on metaventrite 2–3X diameter of those on disc, interspaces smooth to alutaceous on disc, granular laterally, punctures separated by 2–3 diameters on disc. Abdominal sternite 1 with large moderately impressed punctures, punctures equal to large ones on head, interspaces smooth to alutaceous, separated by 1–2 diameters. Hypopygidium with deep punctures, similar to those on sternites 2–4, interspaces smooth to alutaceous, separated by 1–2 diameters.

Head wider than long (W:L = 1.44:1). Antennal club compact, ovoid, asymmetrical with terminal antennomere longer than 9–10 combined. Antennomeres 4–8 compact, 6–8 disc-like and 4–5 cuboidal. Antennal scape asymmetrical, hemispherical, 1.6X length of pedicel. Pedicel subcylindrical. Antennal segment 3 subequal to pedicel. Antennal club large, 0.85 length of segments 1–8 combined. Elevated region of mentum with anterior angles obsolete, anterior margin hemispherical, transversely hemispherical, convex in lateral view.

Pronotum widest in posterior 0.33 (L:W = 1:1.9), anterior margin shallowly trapezoidal, lateral margins less arcuate posteriorly. Scutellum large, triangular, apex acute. Prosternal process in lateral view with even convexity over procoxae; posterior face prominent and oblique. Mesoventrite extending between mesocoxae, evenly concave for reception of metaventrite. Metaventrite wider than long (W:L = 3.3:1). Metepisternum with slight medial constriction, oblique line dividing anterior 0.18. First abdominal sternite with acuminate process between metacoxae. First sternite ~2X’s longer than sternite 2. Sternites 2–3 subequal, 4 slightly larger than 1 or 2. Hypopygidium subequal to sternite 1.

Protibia with apical tooth prominent, longer than tarsomeres 1 and part of 2 combined. Outer apical notch with 95° angle, notch depth deep, equal to length of tarsomere 1 and part of 2 combined. Inner apical spine subequal to tarsomere 1. Mesotibia more heavily armed than protibia with more dense stiff setae and slender spines along lateral edge. Outer apical process elongate and robust, larger than protibial process. Inner apical spine equal to tarsomeres 1–2 combined. Metatibia with heavier armature than mesotibia, more setae and spines and inner apical spine equal to tarsomeres 1–2 and part of 3 combined.

Male genitalia well-sclerotized. Anal sclerite with apical fimbria elongate (Fig. 12). Spiculum gastrale with wide lateral flanges, numerous short stiff setae at apex (Fig. 53). Tegmen evenly rounded (Fig. 95), longer than wide (w:l = 1:2.4), lateral row of setae visible from median fossa to around apex, shallow concavity in apical 0.33. Median lobe short and robust, 0.5 length of tegmen, apex acuminate, apical opening welldeveloped (Fig. 138). Ejaculatory rods not fused to basal piece and split into two adjacent pieces, distal pieces abutting apically, basal piece of internal sac sclerites with two lateral and one medial arm (Fig. 181).

Female genitalia moderately sclerotized. Paraprocts large with sclerotization along median line to apicolateral angles. Gonocoxite with two basal lateral prominences. Gonocoxal apices with recurved “tooth” absent. Two elongate setae originate from small depressions on gonocoxal apices. Intragonocoxal invagination moderately deep, 0.5 length of gonocoxite (Fig. 219).

Variation. Some male specimens <3mm in length.

Seasonality/Habitat. Collected from May and June in lowland tropical forests.

Distribution. Known from central Guyana.

Notes. Host data indicated as “puffball”. One specimen collected from an Acromyrmex hystrix refuse pile, which could be accidental or indicate that the refuse was sufficiently decayed to potentially have fungal mycelia, thereby providing a fungal food source.

Etymology. Specific epithet denotes the cryptic, uniform coloration.