Togoperla poilanina (Navas) Stark & Sivec, 2008

Stark, Bill P. & Sivec, Ignac, 2008, The Genus Togoperla Klapálek (Plecoptera: Perlidae), Illiesia 4 (20), pp. 208-225 : 217-218

Togoperla poilanina (Navas) , comb. n.

( Figs. 37‐43 , 63‐68 )

Kamimuria poilanina Navas, 1934:9 .

Holotype ♀ (MNHN), Quang Tri, Annam [ Vietnam]

Material examined. Vietnam: Quang Tri [Annam], 1925, Poilane, 1 ♀ ( MNHN, holotype). Vinh Phu Province, Tam Dao , 800‐1100 m, 21 ° 28’ N, 105 ° 38’ E, 19 May‐13 June, 1995, H. Malicky, 1 ♂, 1 ♀ ( PMSL). Adult habitus. General color dark brown. Head with dark brown area covering ocelli and forward to M‐ line. Pronotum brown with scattered rugosities and dark lateral margins ( Fig. 37 ). Wings dark brown except for pale costal margin to cord. Femora pale on basal third to half and dark apically; tibiae entirely dark brown .

Male. Forewing length about 19 mm. Hemitergal lobes about twice as long as basal callus ( Fig. 41 ); lobes gradually tapered from base to apex in lateral aspect ( Fig. 38 ). T 6‐9 with large mesal membranous area surrounded laterally and along anterior margin by sclerotized area; entire membranous area covered by setae. Tergum 5 produced as an emarginate lobe. Aedeagus sinuate in lateral aspect and swollen apically; apex with a dorsolateral pair of ear‐ like lobes and a terminal cylindrical lobe; armature ending subterminally and barely extending onto bases of lateral lobes; armature absent from basolateral lobes and from a large lateral area but covering most of venter; dorsal armature patch strongly narrowed to a small strip that approaches, but does not reach, basolateral lobes ( Figs. 42‐43 ).

Female. Forewing length 27‐29 mm. Subgenital plate parabolic and slightly emarginate or shallowly notched. Dorsal sclerite on plate slender, extending to level of lateral margins of sternum 8 ( Fig. 39 ). Lateral margins of vagina parallel for most of length ( Fig. 40 ).

Egg. Outline barrel shaped; length ca. 0.37 mm, width ca. 0.30 mm. Collar sessile but wide and surrounded by a smooth rim with irregular lobing ( Figs. 63‐66 ). Chorion coarsely punctate except on rim ( Figs. 67 ). Micropylar orifices surrounded by five or six chorionic punctations ( Fig. 68 ).

Larva. Unknown.

Remarks. The association of the K. poilanina holotype with fresh material from Tam Dao was confirmed through comparison of SEM micrographs of eggs from the holotype and from the new locality. The two samples were found to be very similar and to be atypical for Togoperla, However the associated male from Tam Dao and the presence of a large subgenital plate with dorsal sclerite indicate this species is a true member of Togoperla .

This species occurs in the same area as T. clavata (described above), although not necessarily from the same stream, and the two species have similar male hemiterga, general coloration and leg patterns. Males of the two may be distinguished by the presence of brown sclerites in the membrane of terga 6‐9 for T. clavata and by the club shaped hemiterga in lateral aspect for that species. In addition the aedeagal armature for T. clavata is narrowly divided along the mid‐ dorsum and the basolateral lobes are covered with scale‐ like triangular spines. The color patterns also differ slightly on the head with T. clavata having a much more extensive area of black pigment between the compound eyes.

Figures

Figs. 37‐43. Togoperla poilanina. 37. Head and pronotum, 38. Male terminalia, 39. Female terminalia, 40. Vagina, 41. Male hemitergum, lateral, 42. Aedeagus, dorsal aspect, 43. Aedeagus, lateral aspect.

Figs. 63‐68. Scanning electron micrographs of T. poilanina eggs, 63. Entire egg from holotype, 64. Collar and chorionic detail from holotype, 65. Entire egg from Tam Dao specimen, 66. Collar from apical aspect from Tam Dao specimen, 67. Collar and chorionic detail from Tam Dao specimen, 68. Lid from Tam Dao specimen.