Pseudostegana acutifoliolata, Li & Gao & Chen, 2010

Li, Tong, Gao, Jianjun & Chen, Hongwei, 2010, Six new species of the genus Pseudostegana (Diptera: Drosophilidae) from the Oriental region, Journal of Natural History 44 (23 - 24), pp. 1401-1418 : 1407-1408

publication ID	https://doi.org/ 10.1080/00222931003679584
persistent identifier	https://treatment.plazi.org/id/03D55018-3760-FF82-FE0E-65F83D0602A0
treatment provided by	Felipe
scientific name	Pseudostegana acutifoliolata
status	sp. nov.

Treatment

Pseudostegana acutifoliolata View in CoL sp. nov.

( Figure 1A,B View Figure 1 ; 2A View Figure 2 ; 3 View Figure 3 )

Diagnosis

Paramere subapically with one small acute projection, dorsomedially triangularly protruded in lateral view ( Figure 3D,E View Figure 3 ); aedeagus apically strongly curved dorsad ( Figure 3E View Figure 3 ).

Description

Only important characters are given here.

Head. Ocellar triangle black on upper part, mostly brown. Frons brown on upper twothirds, brownish yellow on lower one-third. Pedicel yellow; first flagellomere greyish black. Face mostly black, yellow on lower margin. Clypeus black. Palpus brownish black, broad, large, medially half as wide as long in male. Gena dark brown.

Thorax. Scutum yellow on anterior two-thirds, brownish black on posterior onethird. Pleura brown on upper part, black on lower part. Katepisternal setae two. Scutellum mostly brown, yellow at tip.

Legs. Yellow, black on knee joints of mid- and hindlegs.

Abdomen. Tergites glossy, brownish yellow on first and second, black on the rest. Sternites brown to black in male, yellow to brown in female.

Male terminalia. Epandrium broad, sometimes slightly constricted mid-dorsally, roundly protruded on ventral margin, with pubescence except for anterior margin and about 20 setae ( Figure 3A View Figure 3 ). Surstylus lacking pubescence, with several setae on outer surfaces ( Figure 3A,B View Figure 3 ). Cercus protruded ventrally in lateral view ( Figure 3A View Figure 3 ). Paramere with two long sensilla on expanded lobe and several sensilla on dorsomedial projection ( Figure 3D,E View Figure 3 ). Aedeagus submedially concave in lateral view, with several thin projections on basal process ( Figure 3E View Figure 3 ).

Measurements

BL = 2.75 mm in holotype (range in five male paratypes: 2.44–3.4), ThL = 1.28 mm (0.75–1.44), WL = 2.56 mm (2.1–2.88), WW = 1.16 mm (0.94–1.24), arb = 7/1 (7/2–9/ 1), avd = 0.75 (0.81–0.94), adf = 1.71 (1.8–2.50), flw = 1.71 (1.71–2.75), FW/ HW = 0.38 (0.39–0.46), ch/o = 0.10 (0.08–0.11), prorb = 1.00 (0.89–1.00), vb = 0.60 (0.31–0.78), dcl = 0.26 (0.26–0.31), sctl = 1.00 (1.00–1.25), sterno = damaged (0.64– 0.76), orbito = 0.50 (0.45–0.75), dcp = 0.22 (0.18–0.25), sctlp = 1.37 (1.31–1.50), C = 2.24 (1.61–2.07), 4c = 1.70 (1.71–1.91), 4v = 3.40 (3.30–3.70), 5x = 0.89 (1.07– 1.14), ac = 8.50 (8.80–15.4), M = 0.80 (0.71–0.75), C3F = 0.76 (0.74–0.83).

Type material

Holotype male ( SCAU, No. 120541), China: Mount Diaoluo, Lingshui , Hainan, 18°10′ N, 108°52′ E, altitude 1000 m, 21 May 2004, swept over fallen logs, HW Chen GoogleMaps . Paratypes: China: one male and three females ( SCAU, Nos. 120542–45), same data as holotype GoogleMaps ; nine males, seven females (five males and three females in KIZ; four males and four females in SCAU Nos. 120546–53), 23, 24 May 2008, swept over tussock, J.J. Gao .

Etymology

A combination of the Latin words: acutus plus foliolatus, referring to the paramere acute apically.

Distribution

China (Hainan).