Photinopygus corcovadoensis ( Scheerpeltz, 1969 )

Chatzimanolis, Stylianos, 2023, A revision of the genus Photinopygus Chatzimanolis (Staphylinidae: Xanthopygina), Zootaxa 5292 (1), pp. 1-100 : 37-39

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).

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).

Figures

FIGURE 30. Distribution map of Photinopygus apicalis (Sharp) (circles), and P. corcovadoensis (Scheerpeltz) (squares).

FIGURE. 78–82. Photinopygus corcovadoensis (Scheerpeltz). 78. Habitus. 79. Sternite 7. 80. Sternite 8. 81. Pronotum. 82. Antenna. Not to scale.

FIGURES 83–85. Aedeagus of Photinopygus corcovadoensis (Scheerpeltz). 83. Lateral view. 84. Dorsal view. 85. Detail of paramere, ventral view.