Photinopygus punctatus ( Bernhauer, 1905 )

Chatzimanolis, Stylianos, 2023, A revision of the genus Photinopygus Chatzimanolis (Staphylinidae: Xanthopygina), Zootaxa 5292 (1), pp. 1-100 : 74-76

Photinopygus punctatus ( Bernhauer, 1905)

( Figs. 176 , 184–190 )

Xanthopygus punctatus Bernhauer, 1905: 183 .

Photinopygus punctatus (Bernhauer) ; Chatzimanolis 2021: 91.

Type material. Lectotype, male, with labels: “ Peru ” / “punctiger Fv Bang-Haas determ. Bernh ” / “ punctatus Bernh Typus” / “Chicago NHMus M. Bernhauer Collection ” / “FMNHINS3975434” / “Lectotype Xanthopygus punctatus Bernhauer des. Chatzimanolis 2022 ”. In the collection of FMNH.

Additional Materials. BOLIVIA: Cochabamba: Chapare [-16.83°, -66.16°], iii.1971, Bolle leg. (1 ♀ CNC) ; same locality and collector, iii.1973 (1 ♀ CNC) ; Cristal Mayu [-17.00°, -65.63°], 26.xi.1949. L. Peña leg., Scheerpeltz coll. (1 ♁ NMW) ; ECUADOR: Azuay: Maras [-2.79°, -78.75°] (1 ♀ MFNB) ; El Oro: unknown locality, 23.ii.[19]44, C.B. Williams leg. (♀ NHMUK) ; Pastaza: Llandia , 17km N Puyo [-1.38°, -77.99°], 1000 m, 16.vii.1994, remnant rainforest, F. Génier leg., SM0007817 (1 ♁ SEMC) ; PERU: Cuzco: Consuelo, Manu Rd. , km 165 [-13.10°, -71.60°], 6–7.x.1982, FIT, E Watrous, G. Mazurek leg., FMNHINS4030597 (1 ♁ FMNH) ; Huánuco: Tingo Maria [-9.29°, -75.99°], 5–8.iv.[19]63, L. Peña leg., FMNHINS3975504 (1 ♀ FMNH) ; same locality, 10.x.1954, E.I. Schlinger, E.S. Ross leg. (1 ♀ CAS) ; Cocha Cashu Biol. Station , Manu NP [-11.896°, -71.407°], 350 m, 17.x.2000, R. Brooks leg., SM0268154 (1 ♀ SEMC) ; unknown region: unknown locality, Scheerpeltz coll. (1 ♀ NMW) ; unknown locality, Kraatz coll. (1 ♁ SDEI); unknown locality (1 ♀ MFNB) .

Diagnosis. Photinopygus punctatus belongs in the concave pronotum species group. Among species of that group that have pronotum with dense punctation (i.e., with 5–9 organized rows of punctures on each half beside median impunctate line), antennomeres 4–5 longer than wide, and sternite 7 in males with porose structure, P. punctatus can be recognized by the following combination of characters: sternite 8 in males with large deep Ushaped emargination posteriorly ( Fig. 185 ), sternite 7 in males with narrow, deep and ‘shaved’ (appearing glabrous and ‘excavated’) emargination posteriorly ( Fig. 185 ); aedeagus with median lobe in lateral view with small ( Fig. 188 ) subapical tooth, antennomeres 8–10 transverse ( Fig. 187 ), and deep punctures on head and pronotum ( Figs. 185–186 ).

Description. Forebody ( Fig. 184 ) length 6.6–7.3 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– 8 (orange). Antenna ( Fig. 187 ) with antennomere 3 without tomentose pubescence; antennomere 4 with tomentose pubescence; antennomeres 4–6 longer than wide; antennomere 7 subquadrate; antennomeres 8–10 transverse. Head transverse; HW/HL ratio = 1.47–1.63. 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. 186 ) subquadrate; PW/PL ratio = 1.04–1.12. Lateral margins of pronotum in dorsal view posteriad of midpoint concave; pronotum with 7–8 dense 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 = 1.38–1.48. 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 3–5 with curved carina (arch-like). In males, sternite 7 with large porose structure, sternite 7 with narrow, deep and ‘shaved’ (appearing glabrous, ‘excavated’) emargination posteriorly; sternite 8 with large U-shaped emargination posteriorly ( Fig. 185 ). Aedeagus as in Figs. 188–189 ; in dorsal view paramere converging to narrow rounded apex; paramere subequal and slightly narrower (except apically) than median lobe; in lateral view paramere becoming narrower near tip; paramere with peg setae as in Fig. 189 . Median lobe in dorsal view converging to narrow pointed tip; in lateral view median lobe becoming narrower; median lobe with tiny subapical tooth.

Distribution. Known from the Boreal and South Brazilian biogeographic dominions. Distributed in the department of Cochabamba in Bolivia, the provinces of Azuay, El Oro and Pastaza in Ecuador, and the departments of Cuzco and Huánuco in Peru. Map is shown in Fig.176 .

Habitat. Collected at low to mid elevations (350–1000 m) with flight intercept traps.

Figures

FIGURE 176. Distribution map of Photinopygus mirabilis (Erichson) (circles), P. punctatus (Bernhauer) (stars), and P. thafmasios Chatzimanolis (squares).

FIGURES 184–187. Photinopygus punctatus (Bernhauer). 184. Habitus. 185. Sternites 7–8. 186. Pronotum. 187.Antenna. Not to scale.

FIGURES 188–190. Aedeagus of Photinopygus punctatus (Bernhauer). 188. Lateral view. 189. Dorsal view. 190. Detail of paramere, ventral view.