Ceratostigma gracilis Li, 2002

Jie, Lulan, Liang, Feiyang & Liu, Xingyue, 2022, Revision of the bark louse genus Ceratostigma Li, 2002 (Psocodea: Psocidae: Psocinae) with description of a new species from China, Zootaxa 5168 (2), pp. 196-206 : 197-198

Ceratostigma gracilis Li, 2002

( Figs 1–15 )

Ceratostigma gracilis Li, 2002: 1595 . Type locality: China (Guangxi, Longsheng, Tianpingshan ).

Diagnosis. Male. Forewing ( Fig. 1 ) basal one-fifth with a slightly curved greyish white stripe; radial fork with branches diverging at an angle about 90°. Epiproct ( Figs 3–4 ) nearly triangular, pointed at apex, with a nearly Ushaped sclerotized area at base; hypandrium ( Figs 5–6 ) with a broad ridge at middle. Female. Forewing ( Fig. 8 ) with a grayish white striped marking at one-fifth base; radial fork with branches diverging at an angle about 90°. Pigmented area of subgenital plate ( Figs 14–15 ) roughly T-shaped, distally flat; dorsal valve ( Figs 12–13 ) anterior one-third with a slightly sclerotized area.

Distribution. China (Guangxi).

Material examined. Holotype male, CHINA: Guangxi, Longsheng, Tianpingshan [25°39’N, 109°55’E], 680 m, 12.VII.1982, Fasheng Li ( CAU) ; Paratype: 1 female, same as holotype; 1 male, 1 female, CHINA: Guangxi, Jiuxiu, Dayao Mountain [23°58’N, 110°07’E], 720 m, 23. VI .1982, Fasheng Li ( CAU) .

Remarks. Ceratostigma gracilis is similar to C. macrostigmatum in male forewing basal one-fifth with a slightly curved greyish white stripe; radial fork with branches diverging at an angle less than 90°; epiproct nearly triangular, pointed at apex, with a nearly U-shaped sclerotized area at base; hypandrium with a broad ridge in the medium. C. gracilis can be distinguished from C. macrostigmatum by the hypandrium rounded apically, while the hypandrium of C. macrostigmatum is narrowed distally.

Figures

FIGURES 1–7. Ceratostigma gracile Li, 2002, holotype male. 1. Forewing; 2. Hindwing; 3. Genitalia, dorsal view; 4. Epiproct and paraproct, dorsal view; 5–6. Hypandrium; 7. Phallosome. ep: epiproct; pp: paraproct.

FIGURES 8–15. Ceratostigma gracile Li, 2002, paratype female. 8. Forewing; 9. Hindwing; 10–11. Epiproct and paraproct, dorsal view; 12–13. Gonapophyses, ventral view; 14–15. Subgenital plate, ventral view. ep: epiproct; pp: paraproct; vv: ventral valve; dv: dorsal valve; ev: external valve.