Togoperla tricolor Klapálek, 1921

Stark, Bill P. & Sivec, Ignac, 2008, The Genus Togoperla Klapálek (Plecoptera: Perlidae), Illiesia 4 (20), pp. 208-225 : 220-221

Togoperla tricolor Klapálek

( Figs. 51‐56 , 61‐62 )

Togoperla tricolor Klapálek, 1921:64 .

Holotype ♀ (BMNH), Kiu Kiang [Jiujiang], Jiangxi Province China Perla chekiangensis Chu, 1928:194 .

Holotype ♂ (Yenching University, lost), Lingyin Temple, Hangchow [Hangzhou], Zhejiang Province, China, syn. Sivec et al., 1988 Togoperla valvulata Wu, 1935:232 .

Holotype ♂ (Yenching University, lost), Hai Hui, Kiangsi [Jiangxi Province], China, syn. Sivec et al., 1988.

Material examined. China: Kiu Kiang, 1 ♀ ( BMNH, T. tricolor holotype). Fujian Province, Tachulan, 4500’, foot of Kuatun Mountain , 1‐5 May 1948, J. Fu, 1 ♂ ( USNM) .

Adult habitus. General color dark brown. Head with dark brown area covering ocelli. Pronotum, femora and wings dark brown.

Male. Forewing length about 22 mm. T 5 produced into a truncate or slightly emarginate lobe with lateral angles projecting ( Fig. 51 ); T 6‐ T 9 typical, membranous areas bearing long setae. Dorsal aspect of hemiterga short, with a prominent sulcus and broadly rounded tip; length from basal callus to hemitergal tip slightly less than length of callus; sensilla basiconica clustered on basal callus and hemitergal tips ( Fig. 56 ). Membranous aedeagal sac coarsely armed with short thick spines in a wide band encircling mesal section of sac ( Figs. 52‐53 ); distal margin of dorsal patch strongly notched and proximal margin of dorsal patch terminating in a pair of short pointed areas. dorsolateral surface with a pair of small unarmed lobes; apical lobe cylindrical and armed with an apical patch of long thin setae; dorsobasal lobes unarmed.

Female. Forewing length 25‐32 mm. Subgenital plate parabolic, usually with a shallow apical notch or emargination. Dorsal membrane of plate with a sclerotized mesal band extending less than half the distance from margin to base ( Fig. 54 ). Vagina swollen near midlength and strongly constricted near orifice ( Fig. 55 ); accessory glands about half as long as vagina.

Egg. Length 0.44‐0.47 mm, width 0.31‐0.32 mm. Collar absent, outline oval with broadly rounded poles ( Fig. 61 ). Micropylar canals strongly slanted and subequatorial in position ( Fig. 62 ).

Distribution. Known from east China.

Remarks. Sivec et al. (1988) considered the three species listed above as synonymous (but incorrectly placed them in the synonymyof T. sinensis ), whereasDu & Chou (1999) apparently overlooked T. tricolor and treated T. chekiangensis as the valid name with T.sinensis , T. valvulata , and T. klapaleki assynonyms.Typesfor T.chekiangensis and T.valvulata are lost butfiguresin Wu (1938) showmalesof these species to have the short wide hemiterga typical of T. tricolor and both are reported to have uniformly dark legs similar to those of T.tricolor , consequently we continue to

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support the synonyms proposed by Sivec et al. (1988), except T. tricolor is recognized as the valid name.

The dorsal armature pattern on the aedeagus of this species is similar to the pattern of T. noncoloris in having a distal V‐ shaped incursion of membrane, but that species has dark mesal sclerites on terga 6‐9 which are not present in this species. In addition, Du & Chou (1999) do not show the proximal edge of the dorsal aedeagal armature to project in the same way as in this species, and the wing pigmentation patterns also differ.

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Figures

Figs. 51‐56. Togoperla tricolor. 51. Male terminalia, 52. Aedeagus, dorsal aspect, 53. Aedeagus, lateral aspect, 54. Female terminalia, holotype, 55. Vagina, 56. Male hemitergum, 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.