Sigmatoneura aquilis, Liu, Luxi, Li, Fasheng & Liu, Zhiqi, 2011

Liu, Luxi, Li, Fasheng & Liu, Zhiqi, 2011, The genus Sigmatoneura Enderlein (Psocoptera: Psocidae), with two new species from China, Zootaxa 2999, pp. 33-41 : 38-39

Sigmatoneura aquilis sp. nov.

( Figs. 12–18 )

Male. Coloration (in alcohol). Body brown. Head ( Fig. 12 ) brown with dark brown markings: a band of spots bordering epicranial suture stretching bilaterally on vertex; a quadrate frame on frons opening anteriorly and extending to antennal fossa. Compound eyes grayish black; ocelli black with grayish black ocellar field. Antennae and labrum dark brown; maxillary palpi brown with distal segments dark brown. Thorax brown with dark brown spots. Legs brown, with a band of dark brown marking on femur, tarsi and distal part of tibia dark brown. Fore wing ( Fig. 13 ) hyaline with light brown markings basally, pterostigma fully dark brown with a dark brown band along proximal margin; hind wing ( Fig. 14 ) hyaline, with light brown markings basally. Abdominal segments brown with dark brown spots; apical regions dark brown.

Morphology. Head small, epicranial suture concave and distinct. Fore wing: pterostigma with moderate hind angle, Rs-M crossvein short, distal margin of discoidal cell concave, Cu1a and M fused for a short distance or meeting at a point, radial fork branches diverge at an angle about 90°. Hind wing without marginal setae between R2+3 and R4+5. Hind tibia normal. Abdomen ovoid. Phallosome ( Fig. 15 ) a frame, longer than wide, acuminate proximally and narrow distally, with posterior margin straight. Hypandrium ( Fig. 16 ) with membranous regions anteromedially and marginally, sclerotized arms forming broad T-shaped regions. Epiproct ( Fig. 17 ) with unsclerotized regions antero- and disto-medially; paraproct ( Fig. 18 ) broad triangular, with a strong apical spine, sensory field with about 42 trichobothria.

Measurements. Bw: 6482, B: 4324, FW: 5367, HW: 3567, F: 1422, T: 1774, t1: 467, t2: 327, Mx4: 287, f1: 2372, f2: 2304, f3: 2301, IO/d: 2.867.

Material examined. Holotype male, CHINA: Guizhou Province, Kuankuoshui Nature Reserve, 12.viii.2010, Luxi Liu ( CAU). Paratype, CHINA: 1 male, same as holotype.

Distribution. China (Guizhou).

Etymology. The species name refers to the obvious dark coloration of the specimens.

Remarks. The fore wing of the new species is most similar to Sigmatoneura kolbei described from Japan ( Enderlein, 1906). Tsutsumi (1965) provided genitalia characters of S. kolbei from Taiwan, and the phallosome of S. aquilis is narrower distally and lacks lateral apophyses. Sclerotization regions in the epiproct and hypandrium are also different between the two species.

Figures

FIGURES 12 – 18. Sigmatoneura aquilis sp. nov. Male. (12) Front view of head. (13) Fore wing. (14) Hind wing. (15) Phallosome. (16) Hypandrium. (17) Epiproct. (18) Paraproct. Scales in mm. Figures 13 – 14 and figures 15 – 18 to common scale.