Six new species of the genus Pseudostegana (Diptera: Drosophilidae) from the Oriental region Author Li, Tong Author Gao, Jianjun Author Chen, Hongwei text Journal of Natural History 2010 2010-05-24 44 23 - 24 1401 1418 http://dx.doi.org/10.1080/00222931003679584 journal article 10.1080/00222931003679584 1464-5262 5209709 Pseudostegana minutipalpata sp. nov. ( Figures 1G,H ; 2D ; 6 ) Diagnosis Paramere subapically strongly sclerotized, acute projection ( Figure 6D,E ); aedeagus apically slightly expanded to hammer-shape in lateral view, with lobe-shaped basal processes ( Figure 6D,E ). Description Only important characters are described here. Head. Ocellar triangle and frons brown. Pedicel yellow; first flagellomere black. Face, clypeus, gena brown. Palpus brown and slender, rod-shaped in male. Thorax . Scutum yellow on anterior one-third, brown to black on posterior twothirds. Pleura brown on upper part, black on lower part, slender, rod-shaped in male. Katepisternal setae two. Scutellum brown. Legs. Yellow, black on all knee joints. Abdomen. Tergites mostly brownish black. Sternites greyish yellow. Male terminalia . Epandrium roundly protruded on ventral margin, with about 18 setae ( Figure 6A ). Surstylus protruded on posteroventral corner ( Figure 6A,B ). Cercus ventrally round in lateral view ( Figure 6A ), dorsally elongated in posterior view ( Figure 6C ). Paramere with expanded lobe bearing two long sensilla subapically and several sensilla on dorsomedial projection ( Figure 6D,E ). Figure 6. Pseudostegana minutipalpata sp. nov. , male. (A) epandrium, cercus and surstylus; (B) surstylus; (C) cercus; (D,E) hypandrium, paramere, gonopods and aedeagus. For orientations and organizations see Figure 3. Scale bars: 0.1 mm. Measurements BL = 2.98 mm in holotype (3.00 mm in one female paratype ), ThL = 1.24 mm ( 1.46 mm ), WL = 2.88 mm ( 3.40 mm ), WW = 1.04 mm ( 1.28 mm ), arb = 8/2(7/2), avd = 0.86 (0.93), adf = 2.33 (2.14), flw = 1.83(1.71), FW/HW = 0.42 (0.42), ch/ o = 0.07 (0.05), prorb = 0.93 (0.94), rcorb = 0.13 (0.19), vb = 0.55 (0.57), dcl = 0.27 (0.35), sctl = 1.09 (1.08), sterno = 0.52 (0.58), orbito = 0.50 (0.50), dcp = 0.12 (0.14), sctlp = 1.00 (1.00), C = 2.06 (2.10), 4c = 1.75 (1.52), 4v = 3.20 (3.08), 5x = 1.00 (1.07), ac = 17.50 (12.67), M = 0.60 (0.60), C3F = 0.78 (0.79). Type material Holotype male ( SCAU No. 120555), China : Mengla , Xishuangbanna , Yunnan , 21°28′ N , 101°38′ E , altitude 570 m , 21 April 2007 , swept over fallen logs, J.J. Gao. Etymology A combination of the Latin words: minutus plus palpus , referring to the small palpus. Distribution China ( Yunnan ). The zonaria species group Diagnosis Wing . Medial band as broad as length of dm-cu cross-vein at least; r-m cross-vein clear; M vein gently curved to R 4+5 vein after dm-cu cross-vein ( Figure 2E,F ). Included species Pseudostegana dolichopoda Chen and Wang 2005 from China , Pseudostegana latifasciata Chen and Toda 2005 from Vietanam, Pseudostegana latipalpis ( Sidorenko 1998 ) from China , Pseudostegana nitidifrons Chen and Wang 2005 from China , Pseudostegana zonaria ( Okada 1982 ) from Papua New Guinea , Pseudostegana insularis sp. nov. and Pseudostegana silvana sp. nov. from China . Key to species of the zonaria group 1. Palpus expanded, medially wider than one-third of length.............. 2 Palpus slender, rod-like......................................... 6 2. Medial band as broad as length of dm-cu cross-vein........... P. zonaria Medial band broader than length of dm-cu cross-vein................. 3 3. Paramere apically bifurcated....................... P. insularis sp. nov. Paramere apically not bifurcated.................................. 4 4. Paramere apically smoothly tapering; aedeagus apically slightly pointed..................................................... P. dolichopoda Paramere subapically somewhat expanded; aedeagus apically slightly roundly expanded............................................. 5 5. Aedeagus strongly narrowed on distal one-third........ P. silvana sp. nov. Aedeagus smoothly narrowed on distal half................. P. latipalpis 6. Paramere subapically expanded in ventrally, with one triangular process on distal one-third; aedeagus apically slightly pointed in ventral view.......................................................... P. latifasciata Paramere subapically not expanded, lacking process distally; aedeagus apically roundly expanded in ventral view.................... P. nitidifrons