Flavoperla dao, 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 : 60-61

Flavoperla dao sp. n.

( Figs. 1‐5 )

Material examined. Holotype ♂ and 2 ♂ paratypes from Vietnam, Cao Bang, Ba Be National Park, 3 km along trail to ethnic village overlooking river, 24 May 1995, ROM 956131 , D. Currie, J. Swann (Holotype and paratype, ROM, paratype IEBR). Additional paratypes: Vietnam: Cao Bang, Ba Be National Park, between park gates and dorm building by pond, UV light, 22 May 1995, ROM 956119 , J. Swann, M. McGuffin, 1 ♀ ( ROM). Cao Bang, Ba Be National Park , dorm annex, UV light, 20 May 1995, ROM 956106 , D. Currie, J. Whiting, 1 ♂, 3 ♀ ( ROM, IEBR).

Adult habitus. Biocellate. General color pale yellow or white in alcohol. Head without dark markings, anterior and posterior pronotal margins dark brown but midlateral margins pale ( Fig. 1 ). Wings transparent, veins pale brown but basal third of R darker.

Male. Forewing length 8 mm. Tergum 10 with indistinct epiproct sclerite lying between, and caudal to, paired triangular spines ( Fig. 2 ); epiproct sclerite divided by narrow, longitudinal membranous band. Paraprocts curved forward, pointed and dark brown at tips. Hammer apex unpigmented, hastate in ventral aspect ( Fig. 3 ) and somewhat oval in lateral aspect ( Fig. 4 ). Aedeagus not everted.

Female. Forewing length 10.5‐11.5 mm. Subgenital plate broadly rounded, reaching beyond midpoint of sternum 9. Hind margin of sternum 9 poorly sclerotized and deeply emarginate mesally. Mesoanterior margin of sternum 10 membranous and projecting forward into emargination on sternum 9 ( Fig. 5 ).

Egg. Spindle shaped, collar absent; anchor medusoid. Chorion covered throughout with fine aeropyles; opercular line indistinct.

Larva. Unknown.

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

Diagnosis. See below.

Figures

Figs. 1‐5. Flavoperla dao. 1. Head and pronotum, 2. Male terminalia, dorsal, 3. Male sternum 9, 4. Male segment 9, lateral, 5. Female terminalia.