Pygophora unicolor ( Stein, 1920 )

Yoshizawa, Satoshi & Tachi, Takuji, 2018, Taxonomic review of the genus Pygophora Schiner of Japan (Diptera: Muscidae), Zootaxa 4418 (5), pp. 449-468 : 464

Pygophora unicolor ( Stein, 1920)

( Figs. 10a–d , 12 )

Coenosia unicolor Stein, 1920: 64 . Holotype female ( Zoological Museum , Amsterdam, Netherlands). Type locality: Java, Indonesia.

Redescription. Male. Differing from P. boninensis as follows: Head. Fronto-orbital plate blackish brown; face and parafacial silvery gray; gena brown; frontal vitta black. Antenna blackish yellow except 3rd aristomere brown; palpus and labella blackish yellow. Vertex approximately 1/5 of head width; first flagellomere 4.5–5.0 times as long as pedicel. Thorax. Scutum, postpronotum, scutellum, and pleura black in ground color, with blackish gray pruinosity; anterior and posterior spiracles blackish yellow. Wing. Upper and lower calypters dark yellow. Legs. All coxae blackish gray; all trochanters dark yellow; all femora black on basal 1/2 to 3/4 and creamy yellow apically. Fore tibia with 2–3 anterodorsal setae; mid tibia with 2–3 posterodorsal setae; hind tibia with 2 anterodorsal and 2 posterodorsal setae. Abdomen. Yellow in ground color with black pruinosity. Abdominal tergite 5 without dorsal keel; sternite 5 broad, bifurcated posteriorly with several setae at middle and apical part in ventral view. Male terminalia. Surstylus slender and hook-like apically with many setae in lateral view, broad and nearly triangular in dorsal view; cerci broad and nearly rectangular with many setae in dorsal view; postgonite slender and curved dorsally at middle; phallus curved dorsally at middle, hook-like apically with large membranous areas laterally. Female. Differing from male as follows: first flagellomere 2.7–3.0 times as long as pedicel; upper and lower calypters brownish yellow; hind tibia with 1 anteroventral seta. Female terminalia. Very similar to P. boninensis . Body length. 4.0– 5.7 mm.

Material examined. JAPAN: 2 females, Onoaida , Yakushima town, Yakushima Is., Kumage-gun, Kagoshima pref. [N 30°14’39” / E 130°33’30”], 7–9. III. 2013 ( BLKU) ; 4 males and 3 females, Gusuku , Sumiyo town, Amami city, Kagoshima pref. [N 28°17’50” / E 129°27’31”], 1–5. VII. 2013 (BLKU) ; 2 males and 1 female, Sedake , Nago city, Okinawa pref. [N 26°33’26” / E 128°3’83”], 24–27. VI. 2013 (BLKU) ; 1 female, Hama , Kunigami Vil., Kunigami-gun, Okinawa pref. [N 26°42’32” / E 128°10’54”], 22. VI. 2013 (BLKU) .

Distribution. Japan (Kyushu, Ryukyu), Taiwan, Sri Lanka, Malaysia, Indonesia.

Bionomics. This species was found and collected by the first author in a forest.

Remarks. This species is easily distinguishable from other species by having black body color. This is the first record of the species from Japan.

Figures

FIGURE 10. Pygophora unicolor (Stein), male sternite 5 and terminalia: a. Male sternite 5 in ventral view (setae omitted on the left side). b. Hypandrium, pregonite, postgonite, and phallus in lateral view. c. Epandrium, surstylus, and cerci in lateral view.d. Same in dorsal view (setae omitted on the left side) (Scale bars = 0.2 mm).

FIGURE 12. Distribution map for Pygophora spp. in Japan:P.boninensis Snyder (black star); P.confusa Stein (white star); P. immaculipennis Frey (black circle); P. lepidofera (Stein) (white circle); P. longicornis (Stein) (black triangle); P. macularis (Wiedemann) (white triangle); P. maculipennis Stein (black square); P. respondens (Walker) (white square); P.unicolor (Stein) (black hexagon).