Photinopygus cyanipennis ( Sharp, 1876 )

Chatzimanolis, Stylianos, 2023, A revision of the genus Photinopygus Chatzimanolis (Staphylinidae: Xanthopygina), Zootaxa 5292 (1), pp. 1-100 : 45-48

Photinopygus cyanipennis ( Sharp, 1876)

( Figs. 101–108 )

Xanthopygus cyanipennis Sharp, 1876: 127 .

Xanthopygus violaceipennis Bernhauer, 1927: 169 . New synonymy.

Photinopygus cyanipennis (Sharp) ; Chatzimanolis 2021: 91.

Photinopygus violaceipennis (Bernhauer) ; Chatzimanolis 2021: 91.

Type material. Lectotype, here designated, male with labels: “[White cardboard] Xanthopygus cyanipennis Amazons Type D.S.” / “Type” / “Ega [Tefé, -3.35°, -64.71°]” / “ S. America Brazil ” / “Sharp Coll. 1905-313” / “ Xanthopygus cyanipennis Amazons ♁Type D.S.” / “Lectotype Xanthopygus cyanipennis Sharp des. Chatzimanolis 2022 ”. In the collection of NHMUK.

Type material for X. violaceipennis : Lectotype, here designated, male with labels: “Amazonas Standiger” / “violaceipenis [sic] Bernh. Typus unic.” / “Chicago NHMus M. Bernhauer collection” / “Bernhauer Brazil Types Photographed E. Caron 2017” / “FMNHINS3048920” / “Lectotype Xanthopygus violaceipennis Bernhauer des. Chatzimanolis 2022 ”. In the collection of FMNH.

Additional Materials. BRAZIL: Amazonas: Tefé [-3.35°, -64.71°], Sharp coll., FMNHINS3975539 (1 ♁ FMNH) ; Espírito Santo: unknown locality, Sharp coll. (1 ♀ NHMUK) ; Paraná: Caviuna [-23.30°, -51.37°], xii.1945, A. Maller leg. (2 ♀ AMNH) ; Rio de Janeiro: Rio de Janeiro [-22.91°, -43.20°], 25.xii.1927, O. Condo leg. (1 ♀ MFNB) ; same locality, Sharp coll. (1 ♀ NHMUK) ; Nova Friburgo [-22.38°, -42.56°], W. Schaufuss leg. (1 ♀ MFNB) ; Rondônia: Caucalandia [-10.53°, -62.80°], 160–350 m, 19.x.1991, J. Macdonald leg. (2 ♁, 1 ♀ MEM) ; Santa Catarina: Nova Teutônia [Seara] [-27.25°, -50.33°], F. Plaumann leg. (1 ♀ MFNB) ; ECUADOR: Esmeraldas: Bilsa [0.33°, –79.72°], 10.v.–5.vi.1996, FIT, P. Hibbs leg., SM0075073 (1 ♀ SEMC) ; Pichincha: Maquipucuna Biological Station [0.12°, -78.63°], 1300 m, 8–18.iii.1996, Malaise trap, P. Hibbs leg., SM0170383 (1 ♁ SEMC) ; same locality, river trail, 1200 m, 27–29.x.1999, FIT, Z.H. Falin leg., SM0352317 (1 ♀ SEMC) ; Rio Palenque Science Center [0.60°, -79.35°], 200 m, 25.v.–6.vii.1996, Malaise trap, P. Hibbs leg., SM0170381 (1 ♀ SEMC) ; PERU: Junín: Chanchamayo [-11.05°, -75.33°], Sharp coll., Bernhauer coll., FMNHINS3975846 (1 ♁ FMNH) ; unknown locality, 8.xi.1935, Tottenham coll. (1 ♁ NHMUK)

Diagnosis. Photinopygus cyanipennis belongs in the convex pronotum species group. Among species of that group, P. cyanipennis can be recognized by the following combination of characters: tergite 5 with complete curved carina (arch-like; Fig. 101 ), antennomeres 8–10 subquadrate ( Fig. 104 ), sternite 8 with medium V-shaped emargination posteriorly ( Fig. 102 ), emargination having a ‘shaved’ (glabrous) margin, and aedeagus as in Figs. 105–107 . Additionally, the anterior half of sternite 7 is dark brown, however, the coloration of sternite 7 is not always a reliable character.

Description. Forebody ( Fig. 101 ) length 6.3–7.6 mm. Color of head, pronotum and mesoscutellum dark brown to black; antennae orange; legs dark brown to black except protarsi dark orange (in some specimens meso-, metatarsi light brown); elytra metallic blue with green or purple overtones; abdomen dark brown to black except segments 7 (completely orange or posterior half orange) and 8 (orange). Antenna ( Fig. 104 ) with antennomere 3 without tomentose pubescence; antennomere 4 with tomentose pubescence; antennomeres 4–7 longer than wide; antennomeres 8–10 subquadrate. Head transverse; HW/HL ratio = 1.27–1.50. Posterior margin of head slightly extended posteriad on each side of neck. Head with medium-sized punctures, distance between punctures as wide as 1–2 punctures but punctures denser posteriorly. Left mandible with bicuspid tooth. Pronotum ( Fig. 103 ) subquadrate; PW/PL ratio = 1.05–1.09. Lateral margins of pronotum in dorsal view posteriad of midpoint convex; pronotum with 7–8 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 = 1.41–1.53. Elytra with dense punctation; distance between punctures as wide as 0–0.5 punctures. Metepisternum covered with punctures (impunctate area less than 1/3). Abdomen with tergite 3 having setose punctures only on posterior margin; tergite 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 medium V-shaped emargination posteriorly, emargination with ‘shaved’ margin ( Fig. 102 ). Aedeagus as in Figs. 105–107 ; in dorsal view paramere converging before expanding to narrow pointed apex; paramere shorter and narrower than median lobe; in lateral view paramere converging to narrow tip; paramere with peg setae as in Fig. 107 . Median lobe in dorsal view converging to narrow pointed tip; in lateral view median lobe becoming narrower near the tip; median lobe with subapical tooth.

Distribution. Known from the Pacific, South Brazilian, and Paraná biogeographic dominions. Distributed in the states of Amazonas, Espírito Santo, Paraná, Rio de Janeiro, Rondônia and Santa Catarina in Brazil, the provinces of Esmeraldas and Pichincha in Ecuador, and the department of Junín in Peru. Map is shown in Fig. 108 .

Habitat. Collected at low to mid elevations (60–1300 m) using flight intercept and malaise traps.

Remarks. Two specimens labelled as syntypes of X. cyanipennis Sharp belong to P. apicalis .

Figures

FIGURE 108. Distribution map of Photinopygus cyanipennis (Sharp) (circles), P. haemorrhoidalis (Germar) (triangles), and P. schedonapicalis Chatzimanolis (stars).

FIGURES 101–104. Photinopygus cyanipennis (Sharp). 101. Habitus. 102. Sternites 7–8. 103. Pronotum. 104. Antenna. Not to scale.

FIGURES 105–107. Aedeagus of Photinopygus cyanipennis (Sharp). 105. Lateral view. 106. Dorsal view. 107. Detail of paramere, ventral view.