Neoperla sinuata, Stark & Sivec, 2008

Stark, Bill P. & Sivec, Ignac, 2008, New Species And Records Of Neoperla (Plecoptera: Perlidae) From Vietnam, Illiesia 4 (3), pp. 19-54 : 25-26

Neoperla sinuata sp. n.

( Figs. 15‐18 )

Material examined. Holotype ♂ and 1 ♂ paratype from Vietnam, Dong Nai, Cat Tien National Park , stream crossing road N of park headquarters, 11 ° 26’ N, 107 ° 25’ E, 120 m, UV light, 23 August 1998, B. Hubley, D. Currie, ROM 982006 , ( ROM) . Additional paratype: Vietnam: Dong Nai, Cat Tien National Park , near park headquarters, 11° 25’ 22” N, 107° 25’ 41” E, 22 August 1998, B. Hubley, D. Currie, ROM 982002 , 1 ♂ ( IEBR) .

Adult habitus. Biocellate. Head pattern mostly pale but with an obscure ocellar spot. Pronotum pale brown with slightly darker rugosities; median suture, anterior and posterior margins dark ( Fig. 15 ). Wing membrane pale amber, veins darker, costal area pale. Femora pale brown, tibiae darker.

Male. Forewing length 7.5‐ 8 mm. Tergum 7 process triangular and armed apically with 3‐4 small spines. Mesal sclerite of tergum 8 a low mound with a small patch of sensilla basiconica. Tergum 9 with lateral sensilla basiconica patches set on low mounds and with a small median patch set on a flat sclerite. Hemitergal lobes relatively straight ( Fig. 16 ). Aedeagal tube slender and poorly sclerotized; dorsal margin armed beyond midlength with a few spines and ventral margins with a pair of apical spiny lobes ( Figs. 17‐18 ). Aedeagal sac sinuately curved and armed with a spine patch that rings sac near midlength and continues along dorsal margin ( Fig. 17 ).

Female. Unknown.

Larva. Unknown.

Etymology. The species name refers to the sinuate form of the aedeagal sac.

Diagnosis. The aedeagus of N. sinuata is generally similar to that of N. saraburi Zwick but in that species the ventroapical spiny lobes of the tube are absent ( Zwick 1988).

Figures

Figs. 15‐18. Neoperla sinuata. 15. Head and pronotum. 16. Male terminalia. 17. Aedeagus. 18. Aedeagal tube armature, ventral.