Symbiopsocus Li (Psocoptera: Psocidae), with a new species from China Author Liu, Luxi Author Li, Fasheng Author Liu, Zhiqi text Zootaxa 2011 2780 63 68 journal article 10.5281/zenodo.206938 8180a75b-3543-4c9d-8f39-8ea8ab3e957a 1175-5326 206938 Symbiopsocus furcatus sp. nov. ( Figs. 1–11 ) Diagnosis. Fore wing largely clear, Rs and M fused for a short distance; epiproct invaginated proximally on each side; hypandrium symmetrical, with two pairs of lobes, posterior lobes forming V-shaped structure; phallosome rhombic; pigmented arms of subgenital plate forming V-shaped pattern at terminal ends. Male. Coloration (in alcohol). Body generally buff. Compound eyes grayish black; ocelli pale with grayish black ocellar field. Rest of head creamy brown with dark-brown markings: band of spots bordering median ecdysial line and compound eyes dorso-medially; rhombic marking open anteriorly on frons. Antennae and labrum dark brown; apical segment and basal half of second segment of maxillary palpus ( Fig. 2 ) dark brown, remainder of maxillary palpus brown. Thorax buff, with dark brown spots. Legs brown with tibiae and tarsi dark brown. Wings ( Fig. 1 ): fore wing largely clear with light brown wash, brown spots covering pterostigma, base of fore wing and distal end of vein Cu2; hind wing clear with gray wash. Abdominal segments mostly creamy white, with narrow band of brown pigment along each side; apical region dark brown. Morphology. Head ( Fig. 3 ) inverted triangular, with straight epicranial suture. Compound eyes ovoid. Antennae longer than fore wing. Fore wing membranous; Sc ending free in membrane, Rs and M fused for a short distance, apex angle of pterostigma moderate, distal closure of discoidal cell concave, anterior margin of areola postica in a straight line, first and second sections of Cu1a almost equal length; radial fork branches diverge at an angle less than 90°. Hind wing without marginal setae between R2+3 and R4+5. Abdomen ovoid. Phallosome ( Fig. 4 ) a rhombic frame, much longer than wide, with long apical spine and basal prong. Hypandrium ( Fig. 5 ) symmetrical with two pairs of lobes and sharp sclerotized region basally on each side; posterior lobes forming V-shaped structure and median lobes expanded basally. Epiproct ( Fig. 6 ) round, proximally invaginated on each side, with stirrup pigmented area, slightly protruding in middle over clunium; paraproct ( Fig. 7 ) broad with small apical spines, sensory field with about 29 trichobothria. Measurements (figure for holotype male). Bw: 4322, B: 2845, FW: 3662, HW: 2710, F: 710, T: 1534, t1: 506, t2: 146, Mx4: 193, f1: 545, f2: 495, f3: 415, IO/d: 0.74. Female. Coloration (in alcohol). Same as male (antennae lost). Morphology. Wings as male. Subgenital plate ( Fig.8 ): egg guide moderately long, subapically invaginated and medially unpigmented, with long setae apically and short setae subapically; pigmented arms forming V-shaped pattern at terminal ends. Ovipositor valvulae ( Fig. 9 ): ventral valve elongate pointed apically; dorsal valve broad with slender distal process, ventrally with a field of short setae from subapex to middle; outer valve elliptical, with moderate round posterior lobe and long setae. Epiproct ( Fig.10 ) triangular, with a field of setae on distal half; paraproct ( Fig.11 ) triangular, absence of apical spine, sensory field with about 27 trichobothria. Measurements (figure for a female collected from Leigong Mountain Nature Reserve). Bw: 4917, B: 3715, FW: 4268, HW: 3244, F: 922, T: 1943, t1: 507, t2: 153, Mx4: 182, IO/d: 1.59. Material examined. Holotype male, CHINA : Guizhou Province, Kuankuoshui Nature Reserve, 13.viii.2010 , Luxi Liu ( CAU ). Paratypes , CHINA : 1 male , same location and collector as holotype , 10.viii.2010 ; 2 males , same location and collector as holotype , 11.viii.2010 ; 1 male and 1 female , Guizhou Province, Leigong Mountain Nature Reserve, 14.iv.2005 , Yi Tang (Guizhou); 1 male and 1 female , Sichuan Province, Emei Mountain, 15.vii.2010 , Junchao Wang ( CAU ). Distribution. China (Guizhou, Sichuan). Etymology. The specific name refers to the characteristic V-shaped posterior lobes of the hypandrium. Remarks. This new species is similar to S. quadripartitus Li and S. subrhombeus Li in fore wing pattern, in having a symmetrical hypandrium with two pairs of lobes, and in having a rhombic phallosome. It can be distinguished easily by the V-shaped structure of posterior lobes and sharp sclerotized regions basally on hypandrium.