Photinopygus chapareanus ( Scheerpeltz, 1969 )

Chatzimanolis, Stylianos, 2023, A revision of the genus Photinopygus Chatzimanolis (Staphylinidae: Xanthopygina), Zootaxa 5292 (1), pp. 1-100 : 27-30

Photinopygus chapareanus ( Scheerpeltz, 1969)

( Figs. 39 , 48–55 )

Xanthopygus chapareanus Scheerpeltz, 1969: 115 .

Photinopygus chapareanus (Scheerpeltz) ; Chatzimanolis 2021: 91.

Type material. Lectotype, here designated, male, with labels: “♁” / “ Bolivia: Chapare [-16.83°, -66.16°], 400 m, 30.v.1949, leg. R. Zischka” / “ Xanthopygus chapaeanus Scheer ” / “ex coll Scheerpeltz” / “Typus Xanthopygus chapareanus O. Scheerpeltz ” / “ Lectotype Xanthopygus chapareanus Scheerpeltz des. Chatzimanolis 2022 ”. In the collection of NMW. Paralectotypes, here designated, with labels as the lectotype (1 ♁, 2 ♀ NMW); as the lectotype except 15.viii.1950 (1 ♀ NMW), as the lectotype and FMNHINS3975860 (1 ♁ FMNH). All paralectotypes with label: “ Paralectotype Xanthopygus chapareanus Scheerpeltz des. Chatzimanolis 2022 ”.

Additional Materials. BRAZIL: Pará: Jacareacanga [-6.22°, -57.76°], xii.1968, M. Alvarenga leg. (3 ♁, 3 ♀ AMNH) ; Santarém [-2.44°, -54.70°] (1 ♁ CMNH) ; Mato Grosso: Sinop [-11.87°, -55.50°], x.1976, M. Alvarenga leg. (3 ♁, 4 ♀ CNC) ; Rondônia: 62km SW Ariquemes, Fzda. Rancho Grande [-10.53°, -62.80°], 7–10.x.1993, C.W. & L.B. O’Brien leg., FMNHINS3975556, FMNHINS3975559, FMNHINS3975558, FMNHINS3975554, FMNHINS3975550, FMNHINS3975552, FMNHINS3975553, FMNHINS3975555, FMNHINS3975557, FMNHINS3975551 (2 ♁, 8 ♀ FMNH) ; same locality, 11–22.xi.1991, B.C. Ratcliffe leg., SM0080029 (1 ♁ SEMC) ; BOLIVIA: Beni: Rio Mamoré, ~ 5 km NW mouth of Rio Grande [-15.77°, -64.78°], 2.viii.1965, J.K. Bouseman leg. (1 ♀ AMNH) ; Cochabamba: 67.5 km NE Cochabamba, Valle del Sajita, University de San Simon [-17.109°, - 64.798°], 300 m, 9–13.ii.1999, FIT, R. Hanley leg., SM0162106, SM0162100, SM01611864, SM0161865 (1 ♁ UTCI; 1 ♁, 2 ♀ SEMC) ; same locality except 7–9.ii.1999, SM0161177, SM0161781, SM0161820, SM0161776 (3 ♁, 1 ♀ SEMC) ; 67.5 km NE Cochabamba, Valle del Sajita, University de San Simon [-17.109°, -64.798°], 300 m, 9– 13.ii.1999, FIT, F. Génier leg., SM0174147, SM0173665 (2 ♁ SEMC) ; 117 km E Yungas ( Cochabamba-Villa Tunari Rd. ) [-17.109°, -65.687°], 1040 m, 10–12.ii.1999, FIT, R. Hanley leg., SM0162074, SM0118263, SM0162021, SM0161919, SM0162063 (1 ♁, 1 ♀ UTCI; 2 ♁, 1 ♀ SEMC) ; Cochabamba, Villa Tunari Mackia Ecological Park [-16.974°, -65.411°], 430 m, 12.ii.1999, stump insecticide/pyrethrum fogging. R. Hanley leg., SM0117752 (1 ♁ SEMC) ; Santa Cruz: Amboro National Park, Los Volcanes [-18.10°, -63.60°], 1000 m, 20.xi.–12.xii.2004, FIT, H. Mendel, M.V.L. Barclay leg. (5 ♁, 9 ♀ NHMUK) ; 3.7 km SSE Buena Vista, Hotel Fauna y Flora [-17.516°, -63.647°], 400 m, 7.v.2004, Banana trap, A.R. Cline leg., SM0787859, SM0779684, SM0779697, SM0779417 (3 ♁, 1 ♀ SEMC) ; same locality, 3–9.ix.2002, primary forest, FIT, R. Leschen leg, SM0480715 (1 ♁ SEMC) ; 33.3 km W Concepción [-16.13°, -62.03°], 22.xi.1992, D. Brzoska leg., SM0080013 (1 ♁ SEMC) ; Potrerillos del Guenda, Preserva Natural [-17.667°, -63.45°], 370 m, 13–15.x.2007, FIT, A. Cline leg., UTCI000000842 (1 ♀ UTCI) ; PERU: Huánuco: Tingo Maria [-9.30°, -76.00°], 610 m, 15.viii.1971, vegetation on steep hillside, P.S. & H.L. Broonfield leg. (1 ♁ SEMC) ; Cusco: Villa Carmen field station, ~ 1.7 km west cafeteria research transect [-12.893°, -71.419°], 555 m, 21–22.v.2011, FIT, D.J. Bennett, E. Razuri leg., SEMC1460085, SEMC1015057, SEMC1460090, SEMC1460083, SEMC1460080 (2 ♁, 3 ♀ SEMC) .

Diagnosis. Photinopygus chapareanus belongs in the narrow pronotum species group. Among species of that group, that have pronotum with sparse punctation (i.e., with 3–5 loosely organized rows of punctures on each half beside median impunctate line), and antennomeres 4–5 longer than wide, P. chapareanus can be recognized by the following combination of characters: tip of paramere in dorsal view rounded ( Fig. 53 ), median lobe in dorsal (slightly oblique; Fig. 55 ) view converging to hook-like structure, tip of hook-like structure barely divided into two tightly jointed apical peaks, and median lobe in lateral view with two large lateral teeth.

Description. Forebody ( Fig. 48 ) length 4.7–5.8 mm. Color of head, pronotum and mesoscutellum dark brown to black; antennomeres 1–4 dark orange; antennomeres 5–11 dark brown to black; legs dark brown to black except prolegs dark orange in some specimens; elytra metallic blue with green or purple overtones; abdomen dark brown to black except segments 7–8 (orange). Antenna ( Fig. 51 ) with antennomere 3 without tomentose pubescence; antennomere 4 with tomentose pubescence; antennomeres 4–5 longer than wide; antennomeres 6–7 subquadrate; antennomeres 8–10 transverse. Head transverse; HW/HL ratio = 1.42–1.46. Posterior margin of head slightly extended posteriad on each side of neck. Head with sparse medium-sized punctures, distance between punctures as wide as 2–3 punctures but punctures denser posteriorly. Left mandible with bicuspid tooth. Pronotum ( Fig. 50 ) subquadrate; PW/PL ratio = 1.00–1.07. Lateral margins of pronotum in dorsal view posteriad of midpoint strongly converging; pronotum with 3–4 sparse rows of punctures on each half beside median impunctate line; distance between punctures as wide as 1–2 punctures but areas of pronotum without punctures. EL/PL ratio = 1.32–1.33. Elytra with dense punctation; distance between punctures as wide as 0.5–1 punctures. Metepisternum covered with punctures (impunctate area less than 1/3). Abdomen with tergites 3–4 setose; tergites 3–5 with curved carina (arch-like). In males, sternite 7 without porose structure, sternite 7 with shallow and broad emargination posteriorly; sternite 8 with small V-shaped emargination posteriorly ( Fig. 49 ). Aedeagus as in Figs. 52–55 ; in dorsal view paramere almost parallel-sided, slightly expanding just before apex; with broad rounded apex; paramere as long and as wide as median lobe; in lateral view paramere becoming narrower near tip; paramere with peg setae in lateral rows as in Fig. 54 . Median lobe in dorsal (slightly oblique; Fig. 55 ) view converging to hook-like structure, tip of hook-like structure barely divided into two tightly jointed apical peaks; in lateral view hook-like structure with two large lateral teeth.

Distribution. Known from the South Brazilian biogeographic dominion. Distributed in the states of Pará, Mato Grosso and Rondônia in Brazil, the departments of Beni, Cochabamba, and Santa Cruz in Bolivia, and the departments of Huánuco and Cusco in Peru. Map is shown in Fig. 39 .

Habitat. Collected at low to mid (300–1040 m) elevations on vegetation, by pyrethrum fogging, and with banana and flight intercept traps.

Figures

FIGURE 39. Distribution map of Photinopygus assingi Chatzimanolis (stars), P. chapareanus (Scheerpeltz) (triangles), P. faustus (Erichson) (circles), and P. koptopeos Chatzimanolis (squares).

FIGURES 48–51. Photinopygus chapareanus (Scheerpeltz). 48. Habitus. 49. Sternites 7–8. 50. Pronotum. 51. Antenna. Not to scale.

FIGURES 52–55. Aedeagus of P. chapareanus (Scheerpeltz). 52. Lateral view. 53. Dorsal view. 54. Detail of paramere, ventral view. 55. Detail of the tip of median lobe, oblique view.