A revision of the genus Photinopygus Chatzimanolis (Staphylinidae: Xanthopygina) Author Chatzimanolis, Stylianos text Zootaxa 2023 2023-05-18 5292 1 1 100 http://dx.doi.org/10.11646/zootaxa.5292.1.1 journal article 53342 10.11646/zootaxa.5292.1.1 be05b7e2-ccc8-49cf-9173-1238edee4d40 1175-5326 7959518 8DEB1E66-92FA-4200-91A9-4631057B0600 Photinopygus corcovadoensis ( Scheerpeltz, 1969 ) ( Figs. 30 , 78–85 ) Xanthopygus corcovadoensis Scheerpeltz, 1969: 111 . Photinopygus corcovadoensis (Scheerpeltz) ; Chatzimanolis 2021: 91. Type material. Holotype , female, with labels: “ ♀ ” / Brazil , Rio de Janeiro , Corcovado Mount [-22.95°, -43.21°], xi. 1966 , M. Alvarenga ” / “flying on the top of the Mount” / “ Xanthopygus corcovadoensis Scheerp. ” / “ Ex coll. Scheerpeltz ” / “Typus Xanthopygus corcovadoensis O. Scheerpeltz ”. In the collection of NMW. Scheerpeltz (1969) implied that he had only one specimen which is the holotype. Additional Materials. BRAZIL : São Paolo : Serra da Bocaina [NP], São José do Barreiro [-22.65°, -44.58°], 1650 m, i.1969, M. Alvarenga leg. (1 ♁ AMNH ) . Diagnosis. Photinopygus corcovadoensis is the sole member of the corcovadoensis species group. Photinopygus corcovadoensis can be distinguished from all other species of Photinopygus based on the tomentose pubescence starting on antennomere 3 (in all other species tomentose pubescence starting on antennomere 4). FIGURE. 78–82. Photinopygus corcovadoensis (Scheerpeltz) . 78. Habitus. 79. Sternite 7. 80. Sternite 8. 81. Pronotum. 82. Antenna. Not to scale. Description. Forebody ( Fig. 78 ) length 6.7–6.8 mm . Color of head, pronotum, mesoscutellum and antennae dark brown to black; legs dark brown to black except protarsi dark orange; elytra metallic blue with green or purple overtones; abdomen dark brown to black except segment 7 with posterior 1/3 orange and segment 8 orange.Antenna ( Fig. 82 ) with antennomeres 3–4 with tomentose pubescence; antennomeres 4–6 longer than wide; antennomere 7 subquadrate; antennomeres 8–10. Head transverse; HW/HL ratio = 1.23–1.31. Posterior margin of head not extended posteriad on each side of neck. Head with dense medium-sized punctures, distance between punctures as wide as 0.5 punctures but punctures denser posteriorly. Left mandible with bicuspid tooth. Pronotum ( Fig. 81 ) longer than wide; PW/PL ratio = 0.90–0.91. Lateral margins of pronotum in dorsal view posteriad of midpoint concave; pronotum with 8–9 dense rows of punctures on each half beside median impunctate line; distance between punctures as wide as 0.5–1 punctures. EL/PL ratio = 1.22–1.32. 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 tergites 3–4 setose; tergites 3–4 with curved carina (arch-like). In males, sternite 7 with small porose structure, sternite 7 with shallow and broad emargination posteriorly; sternite 8 with medium V-shaped emargination posteriorly ( Fig. 79 ). Aedeagus as in Figs. 83–85 ; in dorsal view paramere converging to narrow rounded apex; paramere slightly longer and narrower (except tip) than median lobe; in lateral view paramere almost parallel-sided; paramere with peg setae in lateral rows as in Fig. 85 . Median lobe in dorsal view converging to narrow pointed tip; in lateral view median lobe becoming narrower; median lobe with small subapical tooth. Distribution. Known from the Paraná biogeographic dominion. Distributed in states of Rio de Janeiro and São Paolo in Brazil . Map is shown in Fig. 30 . Habitat. Collected at mid elevation ( 1650 m ).