Neoperla dao, 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 : 26-27

Neoperla dao sp. n.

( Figs. 19‐22 )

Material examined. Holotype ♂ (pinned) from Vietnam, Vinh Phu , Tam Dao Hill Station, 930 m, UV light, 15 May 1996, B. Hubley, D.C. Darling, M. Hanson, ROM 961032 ( ROM) . Paratype: Vietnam: Vinh Phu , Tam Dao, 800‐900 m, 17‐31 May 1995, A. Gorohov, 1 ♂ ( PMSL) .

Adult habitus. Biocellate. Head mostly dark but Mline, clypeus and tentoria pale. Pronotum brown with darker rugosities ( Fig. 19 ). Wings dark brown, veins darker except pale costal area. Femora pale in basal half and dark brown apically; tibiae dark brown.

Male. Forewing length 16 mm. Tergum 7 process a raised plateau armed with scattered sensilla basiconica. Tergum 8 process tongue shaped, erect and curved forward ( Fig. 21 ); anterodorsal margin of process with a small patch of sensilla basiconica. Tergum 9 without sensilla patches. Hemitergal processes short and slender ( Fig. 20 ). Aedeagal tube very slender, relatively straight and heavily sclerotized except for a small subapical nipple shaped lobe ( Fig. 22 ). Aedeagal sac very short, ca. 1/3 tube length; sac without large spines but armed over most of surface with minute spines; base of sac unarmed ( Fig. 22 ).

Female. Unknown.

Larva. Unknown.

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

Diagnosis. The aedeagus of this species is generally similar to that of N. yentu but that species has a curved aedeagal tube and the ventral process is bilobed. Yang & Yang (1995 a, 1998) described three species which appear to be members of this complex. Two of these, N. hainanensis and N. quingyuanensis , have bowed aedeagal tubes but the other, N. longwangshana , has the tube and ventral lobe more similar to N. dao . Unfortunately the aedeagal sac was not shown in an everted position in Yang & Yang (1998), and no material is available for our study, so no detailed comparison can be made for these species.

Figures

Figs. 19‐22. Neoperla dao. 19. Head and pronotum, 20. Male terminalia, 21. Male terminalia, lateral aspect, 22. Aedeagus.