Neoperla multispinosa, 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 : 35

Neoperla multispinosa sp. n.

( Figs. 45‐50 )

Material examined. Holotype ♂, 3 ♂ and 1 ♀ paratypes from Vietnam, Vinh Phu , Tam Dao, 800‐ 1100 m, 19 May‐13 June 1995, H. Malicky ( PMSL).

Adult habitus. Biocellate. Head mostly yellow but interocellar area covered by a small brown spot; basal and second antennal segments pale, flagellum dark brown ( Fig. 45 ). Pronotum brown with indistinct rugosities. Femora pale, tibiae brown, darker brown at knee.

Male. Forewing length 11 mm. Tergum 7 process a small parabolic lobe with spiny margin. Tergum 8 with median and sparse lateral patches of sensilla basiconica. Tergum 9 with small median and larger lateral patches of sensilla basiconica; lateral patches on low humps ( Fig. 46 ). Hemitergal processes moderately long and curved or bent laterad at midlength. Aedeagal tube plump and poorly sclerotized except along dorsum; dorsoapical area covered by a conspicuous spiny patch ( Fig. 47 ). Aedeagal sac slightly longer than tube, slender but with three pairs of spiny lobes along ventrolateral surface; sac apex with prominent dorsolateral spines and a ring of smaller terminal spines; much of sac covered on dorsolateral surface by smaller spines ( Figs. 47‐48 ).

Female. Forewing length 14 mm. Subgenital plate slightly produced as a small emarginate tab ( Fig. 49 ). Spermathecal stalk short and very slender ( Fig. 50 ); spermatheca sausage shaped, strongly bent and apically hooked.

Larva. Unknown.

Etymology. The species name refers to the multiple spiny clusters and lobes of the aedeagal tube and sac.

Diagnosis. Three pairs of small lobes along the ventral sac margin, a large dorsoapical spiny patch on the tube and the broad, irregular ring of apical sac spines distinguishes males of this species from others in the montivaga group.

Figures

Figs. 45‐50. Neoperla multispinosa.45. Head and pronotum, 46. Male terminalia, 47. Aedeagus, 48.Aedeagal sac, dorsal, 49. Female terminalia, 50. Vagina and spermatheca.