Xenopygus davidi Chatzimanolis

Chatzimanolis, Stylianos & Caron, Edilson, 2016, New species and synonymies in Xenopygus Bernhauer (Coleoptera: Staphylinidae: Staphylinini), Zootaxa 4200 (1), pp. 131-142 : 133-136

Xenopygus davidi Chatzimanolis , new species

( Figs. 1 , 3–6, 11 )

Type material. Holotype, here designated, male, with labels: “ PERU: Dept. Madre de Dios: Pantiacolla Lodge , Alto Madre de Dios R., 12°39.3’S 71°13.9’W, 420m, 14–19.xi.2007, D. Brzoska, ex. flight intercept trap. PER 1 B07 004” / “[barcode label] SEMC 0871921 ” / “ Holotype Xenopygus davidi Chatzimanolis , des. Chatzimanolis 2016”. In the collection of SEMC .

Paratypes. 40: “ Bolivia: Santa Cruz Dept., 3.7km SSE Buena Vista Hotel Flora y Fauna , 17°29’S 63°33’W, 29.iv.–6.v.2004, A.R. Cline, FIT, BOL 1 Cline 04 016”, barcode label SM0787978 (1 ♂ SEMC) ; “ Bolivia: Cochabamba : Cochabamba, 67.5km NE Est. Biol. Valle del Sajita , Univ. de San Simon, 17°6’33’’S 64°47’52’’W, 300m, 7–9.ii.1999, R.S. Hanley BOL 1 H99 0 56, ex : FIT”, barcode labels SM0161968, SM0159464, SM0159318, SM0161953 (1 ♂, 2 ♀ SEMC; 1 ♀ UTCI); same locality and collector, 9–13.ii.1999, barcode label SM0160601 (1 ♂ SEMC) ; same locality, 7–9.ii.1999, F. Genier, barcode labels SM0171955, SM0171954, SM0174149 (2 ♂, 1 ♀ SEMC) ; same locality and collector, 9–13.ii.1999, barcode labels SM0174031, SM0173642, SM0174382 (2 ♂, 1 ♀ SEMC); “ Ecuador: Sucumbíos, Sacha Lodge , 270m, 0°28’14’’S 76°27’35’’W, 21–24.iii.1999, R. Brooks, ECU1B99 0 47, ex: FIT ”, barcode label SM0154864 (1 ♂ SEMC); “ Ecuador: Napo, R., Sacha Lodge , 250m, 26–28.x.2004, FIT, G. de Rougemont leg.” (1♂, 1 ♀, 1 unknown cRou); “ Guyana: Region 8: Iwokrama Forest, 1km W Kurupukari, Iwokrama field station , 60m, 4°40’19’’N 58°41’4’’W, 20–25.v.2001, R. Brooks, Z.H. Falin, GUY1BF01 0 34. ex: FIT ”, barcode label SM0566074 (1 ♂ SEMC); “ Peru: Dept. Madre de Dios: Pantiacolla Lodge , Alto Madre de Dios R., 12°52.2’S 71°22.6’W, 480m, 10–13.xi.2007, D. Brzoska, ex. flight intercept trap. PER 1 B07 002”, barcode labels SEMC 0869792 , SEMC 0869916 , SEMC 0869841 , SEMC 0870161 , SEMC 0869930 , SEMC 0870046 (2 ♂, 4 ♀ SEMC) ; “ Peru: Madre de Dios Dept., CICRA field station, ~ 2km NW of cafeteria, research plot 12.55236S 70.10989W , 295m, 9–11.vi.2011, Chaboo team, FIT, PER-11-FIT-018”, barcode label SEMC0955143 (1 ♀ SEMC); “ Peru: Cusco Dept., Villa Carmen field station, ~ 2km west cafeteria, research transect 12.89250S 71.41917W, 555m, 21–22.vi.2011, D, Bennett, E. Razuri, FIT, PER- 11 -FIT-007”, barcode label SEMC1460133 (1 ♀ SEMC); same locality and collectors, 26–28.vi.2011, PER- 11 -FIT-013”, barcode label SEMC1465658 (1 ♂ SEMC); same data as holotype, barcode labels SEMC 0874798 , SEMC 0873905 , SEMC 0874770 , SEMC 0873922 , SEMC 0873937 , SEMC 0873939 , SEMC 0874760 , SEMC 0871560 , SEMC 0874656 , SEMC 0874359 , SEMC 0874662 , SEMC 0874586 , SEMC 0874774 (7 ♂, 5 ♀ SEMC; 1 ♂ UTCI); “ Suriname: Sipaliwini District, 2°10.973’N 56°47.235’W , 210m, Camp 2, on Sipaliwini River, leg. A.E.Z. Short, UV-light, 27.viii–1.ix.2010, SR10-0827-LT2, 2010 Ci-RAP Survey ”, barcode label SEMC 0931405 (1 ♂ SEMC). All paratypes with label: “ Paratype Xenopygus davidi Chatzimanolis , des. Chatzimanolis 2016”. A.cvs file of specimen data in Darwin Core fields is available at https://figshare.com/authors/ Stylianos _ Chatzimanolis /38 4794.

Diagnosis. Xenopygus davidi can be easily placed in the punctatus species group based on the punctation of the pronotum. Among taxa in the punctatus group, X. davidi is distinguished by the bright orange coloration of the elytra and the shape of paramere which is (in dorsal view) wide anteriorly and with peg setae only on the lateral margins of paramere ( Fig. 6 ). Xenopygus pycnos has also light brown to orange elytra but the two species can be easily separated based on the punctation patterns of the head and thorax (punctures confluent in X. pycnos ).

Description. Body length 10.1–11.4 mm. Coloration of head, neck and pronotum brown with shining metallic green overtones. Mouthparts reddish-brown; antennae brown. Ventral surface of head brown; ventral surface of thorax and legs reddish brown. Elytra bright orange; mesoscutellum orange to brown. Abdominal segments III–V brown medially with reddish brown laterally and on paratergites. Segment VI mostly brown with paratergites reddish-brown. Abdominal sternite VII brown except posterior 1/5 reddish-brown; sternite VIII dark orange.

Head transverse, width:length ratio = 1.18; eyes large, prominent, head:eye length ratio = 1.55; head with deep medium sized punctures except medially, distance between punctures equal to 0.5–1 times width of puncture; epicranium with sparse microsculpture. Antennae with microtrichiae starting on antennomere 4; antennomeres 1–3 longer than wide; antennomere 4 subquadrate; antennomeres 5–10 transverse, progressively becoming wider. Labial palpomere 3 truncate, slightly dilated. Pronotum longer than wide, pronotum width:length ratio = 0.95; pronotum with multiple rows of medium sized punctures; pronotum midline without punctures. Pronotum subequal in length to elytra; elytra covered with confluent medium sized punctures. Abdominal tergum V without an archlike carina; abdominal terga III–VI with patches of yellow setae on anterolateral corners.

Secondary sexual structures. Males with shallow emargination on posterior margin of sternite VII; porose structure absent on sternite VII; sternite VIII with shallow V-shaped emargination on posterior margin. Females with no apparent secondary sexual structures.

Aedeagus as in Figs. 4–6 ; in dorsal view paramere wide, converging to rounded tip; paramere slightly shorter and narrower than median lobe; in lateral view paramere slightly concave, with wider region medially; paramere with peg setae away from tip. Median lobe in dorsal view wide, parallel-sided, converging to pointed apex, with two small teeth apically; in lateral view becoming narrower near apex.

Etymology. The epithet is in honor of Dr. David Brzoska, who collected many of the specimens in the type series.

Distribution. Known from the departments of Santa Cruz and Cochabamba in Bolivia, Sacha Lodge in Ecuador, Region 8 in Guyana, the departments of Madre de Dios and Cusco in Peru, and the Sipaliwini district in Suriname.

Figures

FIGURE 11. Distribution map of X. davidi Chatzimanolis and X. pycnos Chatzimanolis.

FIGURES 1 – 2. Habitus photographs of new species in Xenopygus. 1. Xenopygus davidi Chatzimanolis, total length = 10.3 mm. 2. Xenopygus pycnos Chatzimanolis, total length = 8.9 mm.

FIGURES 4 – 6. Aedeagus of X. davidi Chatzimanolis. 4. Lateral view. 5. Dorsal view. 6. Detail of paramere, ventral view.