Togoperla canilimbata (Enderlein)

Stark, Bill P. & Sivec, Ignac, 2008, The Genus Togoperla Klapálek (Plecoptera: Perlidae), Illiesia 4 (20), pp. 208-225 : 209-211

Togoperla canilimbata (Enderlein)

( Figs. 1‐6 , 57‐58 )

Perla canilimbata Enderlein, 1909:347 .

Lectotype ♀ ( ZIP), Manson‐ Gebirge, Vietnam. Designation Zwick , 1973b

Paragnetina tonkinensis Navas, 1919:187 .

Holotype ♀ (MNHN, damaged), Vietnam. nov. syn.

Togoperla sinensis Banks, 1939:442 .

Holotype ♂ (MCZ), Yim Na San , Kwangtung [Guangdong], China, nov. syn.

Togoperla klapaleki Banks, 1939:443 .

Holotype ♀ (MCZ), Yim Na San , Kwangtung [Guangdong], China, nov. syn.

Material examined. China: Guangdong, Yim Na San , 11‐16 June 1936, L. Gressitt, 3 ♀ ( MCZ, T. klapaleki holotype and paratypes). Same location, 11‐16 June 1936, L. Gressitt, 1 ♂, 1 ♀ ( MCZ, T. sinensis holotype and paratype) . Vietnam: Manson‐ Gebrige, 2‐3000’, April‐ May, H. Fruhstorfer, 2 ♀ ( ZIP, T. canilimbata lectotype and paralectotype). Lao Cai, Sapa, large waterfall on road from Sapa to Lai Chau, UV light, 8 May 1995, ROM 956022 , D. Currie, B. Hubley, J. Swann, 16 ♂, 1 ♀ ( ROM, IEBR, BPS). Lao Cai, Sapa, Fan Si Pang Mountain , 22‐29 April 1995, 1600 m, 2 ♂ ( ZMB) .

Adult habitus. General color dark brown, patterned with yellow. Head dark brown over ocelli, extending laterally over calluses and forward to M‐ line; a broad triangular dark patch is located forward of M‐ line ( Fig. 1 ); head pale laterally and behind eyes on occiput. Pronotum brown with scattered paler rugosities. Wings dark brown except costal area pale to cord. Legs banded; both femora and tibiae with pale mesal band and dark basal and apical bands.

Male. Forewing length 24‐26 mm. T 5 produced as an emarginate lobe; T 6‐ T 9 typical with anterior margin and lateral areas sclerotized and mid section membranous; membrane of T 6‐ T 9 and lobes of T 5 somewhat hairy ( Fig. 2 ). Dorsal aspect of hemiterga relatively short, length from basal callus to hemitergal tip about equal to length of basal callus. Membranous aedeagal sac terminating in a pair of slender, bare lateral lobes and a slender median lobe armed with fine brown setal spines; subapical area of aedeagus armed with a coarse band of triangular spines and microtrichia ( Figs. 5‐6 ); spine band narrowly interrupted mid‐ dorsally but forming a complete band to beyond mid‐ length on venter. Dorsobasal area of aedeagus bearing a pair of small, bare lateral lobes.

Female. Forewing length 28‐30 mm. Subgenital plate parabolic, usually with a median notch or emargination; plate extends over much of S9 ( Fig. 3 ); dorsal sclerite of plate not reaching to lateral margins

2 5 6

of sternum 8. Vagina with small bulge at midlength ( Fig. 4 ); vaginal accessory glands subequal to vagina in length.

Egg. Length 0.42‐0.44 mm, width 0.30‐0.32 mm. Collar absent, general shape oval ( Fig. 57 ). Micropylar row set near equator. Chorion smooth ( Fig. 58 ).

Distribution. Known from southeastern China and northern Vietnam.

Remarks. Sivec et al. (1988) considered T. canilimbata , T. fortunati and T. grahami as synonyms and this was repeated by Du & Chou (1999). Zwick (1973b) found syntype females of T. canilimbata and illustrated the lectotype subgenital plate and vagina; although the subgenital plate is shown without emargination, this is present on the paralectotype and the two specimens agree in coloration and in vaginal shape. Evidently the subgenital plate margin shows some variation in the expression of a notch or emargination. One of us (IS) examined the lectotype and paralectotype and noted both femora and tibiae have wide yellow median bands which are larger on the hind legs. This color pattern is in agreement with the leg pattern of T. klapaleki and T. sinensis described by Banks (1939) as “...black band at base and tip of femora and tibiae as in perpicta . ” Types of T. fortunati and T. grahami , however, lack pale tibial bands and also lack a dark basal band on the femora, consequently these species are removed from synonymy with T. canilimbata . A consequence of these changes in synonymy is the male of this species is now based on T. sinensis and the recent material from Vietnam with short hemitergal lobes, rather

than T. fortunati and T. grahami with long hemitergal lobes. Togoperla tonkinensis had been reported only from the holotype, supposedly a male, but with the abdomen missing. The damaged specimen from Vietnam, in the Museum National d’Histoire Naturelle has the head, thorax, wings and some legs intact. The legs show the characteristic banding pattern associated with T. canilimbata and allows the placement of T. tonkinensis as a synonym of that species.

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Figures

Figs. 1‐6. Togoperla canilimbata. 1. Head and pronotum, 2. Male terminalia, 3. Female terminalia, 4. Vagina, 5. Aedeagus, dorsal aspect, 6. Aedeagus, lateral aspect.

Figs. 57‐62. Scanning electron micrographs of eggs. 57. T. canilimbata, 58. T. canilimbata micropyles and chorionic detail, 59. T. shan collar, 60. T. shan micropyles and chorionic detail, 61. T. tricolor, from holotype, 62. T. tricolor micropyle and chorionic detail.