Flavoperla hmong, Stark & Sivec, 2008

Stark, Bill P. & Sivec, Ignac, 2008, New Vietnamese Species Of The Genus Flavoperla Chu (Plecoptera: Perlidae), Illiesia 4 (5), pp. 59-65 : 61-62

Flavoperla hmong sp. n.

( Figs. 6‐10 , 17‐19 )

Material examined. Holotype ♂ and 1 ♂, 1 ♀ paratype from Vietnam, Lao Cai, Sapa, large waterfall on road from Sapa to Lai Chau, UV light, 8 May 1995, ROM 956022 , D. Currie, B. Hubley, J. Swann ( ROM). Additional paratypes: Vietnam: Lao Cai, Sapa, Fan Si Pang Mts. , 22‐29 April 1995, 1600 m, 1 ♂, 1 ♀ ( ZMB). Thua Thien Hue , Bach Ma National Park , near junction Rhododendron and Five Lakes trails, 1200 m, 16 June 2000, 16 ° 11’ 10” N, 107 ° 50’ 55” E, ROM 2000531 , B. Hubley, D.C. Darling, 2 ♂, 6 ♀ ( ROM, IEBR) .

Adult habitus. Biocellate. General color yellow patterned with pale brown. Head with dark ocellar patch extending to M‐ line, and smaller brown area forward of M‐ line ( Fig. 6 ). Pronotal margins completely dark brown but midlateral area turned downward, appearing pale in dorsal aspect; disc with scattered pale brown rugosities. Wings transparent, veins pale brown.

Male. Forewing length 10.5 mm. Epiproct sclerite completely dark, quadrangular; anterior margin set between bases of paired triangular spines ( Fig. 7 ). Paraprocts slender, curved forward and hooked at tips. Hammer apex unpigmented and turned upward in lateral aspect ( Figs. 8‐9 ). Aedeagus not everted.

Female. Forewing length 12 mm. Subgenital plate broadly rounded and covering most of sternum 9 ( Fig. 10 ); dorsum of plate bearing a sclerite whose margin is visible as a distinct line crossing plate near base. Sternum 9 with a V‐ shaped, median membranous area; membrane of V‐ shaped notch covered with rows of fine, linear microtrichia.

Egg. Spindle shaped, lid broadly rounded ( Fig. 19 ). Collar absent ( Fig. 17 ), anchor medusoid, consisting of a cushion with multiple finger‐ like lobes (lobes broken in Fig. 17 ). Chorion finely punctate throughout; opercular line present, lid covered with follicle cell impressions which enclose ca. 30 punctations. Micropyles simple ( Fig. 18 ).

Larva. Unknown.

Etymology. The species name, used as a noun in apposition, honors the Hmong people of Vietnam.

Diagnosis. See below.

Figures

Figs. 6‐10. Flavoperla hmong. 6. Head and pronotum. 7. Male terminalia, dorsal. 8. Male sternum 9. 9. Male segment 9, lateral. 10. Female terminalia.

Figs. 17‐22. Flavoperla eggs. 17‐19. F. hmong. 17. Collar region with anchor (finger lobes broken), 18. Subequatorial region of chorion with micropyle, 19. Operculum and lid. 20‐22. F. pallida. 20. Collar region, anchor removed, 21. Subequatorial region of chorion with micropyle, 22. Operculum and lid.