Hydroptila kakidaensis Nozaki & Tanida, 2007

Ito, Tomiko, Ohkawa, Ayuko & Hattori, Toshio, 2011, The genus Hydroptila Dalman (Trichoptera, Hydroptilidae) in Japan, Zootaxa 2801, pp. 1-26 : 19-20

Hydroptila kakidaensis Nozaki & Tanida, 2007

( Figs. 11 , 14 F)

Hydroptila kakidaensis Nozaki & Tanida, 2007 , 245–246, figs. 2–3, male, female, Japan (Honshu).

Adult. Wings dark brown with several small lighter markings. Antennae brown to light brown with darker markings towards apices.

Male. Lengths of forewing, hindwing and body 2.4–2.9 mm, 2.2–2.5 mm and 2.4–3.0 mm, respectively (n=5). Antennae 30–32-segmented; length 1.4–1.7 mm (n=5). Ventral process of sternite VII elongate broad at apex, ventral surface slightly rugose apically. Segment IX with large rounded apico-lateral apodemes and subtriangular setose lobes at postero-lateral angles. Dorsal plate triangular with apex subacute in lateral view, in dorsal and ventral views elongate ovoid, shape of apex variable even within specimens collected from same site, with or without shallow median concavity. Subgenital plate membranous, wide in lateral and ventral views, length variable, between 1/ 4–1/2 as long as dorsal plate. Phallic apparatus slender with long narrow flanges; subapical process almost straight, elongate, slightly curved apically. Inferior appendages short, fused basally, each distally forming 2 lobes; in lateral view dorsal lobe thumb-like, bearing very long seta near apex; mesal lobe larger than dorsal lobe, directed posteroventrad, apex acute.

Female. Lengths of forewing, hindwing and body 2.8–3.2 mm, 2.6–2.9 mm and 2.4–3.3 mm, respectively (n=5). Antennae 24–25-segmented; length 0.8–1.0 mm (n=5). Segment VIII tergite weakly sclerotized with wide shallow excision posteriorly and 5 pairs of setae near posterior-lateral angles; sternite weakly sclerotized with narrow oblique bands at posterior margin; pair of rounded lobes ventrally, each lobe with 2–3 (2 in most specimens) strong, somewhat wavy, setae. Bursa copulatrix lozenge-shaped.

Specimens examined. Honshu. Nagano: 5 males, 1 female, Hotaka-cho, Azumino, 29.V.1999, HN. Shizuoka: 6 males, 3 females, Shimizu-cho, Kakida-gawa (type locality), 27.V.2001, TN & KT, L; 1 male, ibid., 27.IV–11.V.2002, TN, M; 1 female, Shizuoka-shi, Shimo, Kujiraga-ike, 22.X.1995, TH, L; 1 female, Shizuoka-shi, Mizumiiro, 150 m, 27.IX.1995, TH, L; 8 males, 5 females, Shizuoka-shi, Ushizawa, Moriya-sawa, 120 m, 26.VII.1995, TH, L; 1 male, 2 females, Shizuoka-shi, Shinma, Shinmaya-gawa, 110 m, 14.VI.2005, TH, L; 19 males, 19 females, 7 pupae, 7 larvae, Shizuoka-shi, Shinma, Shinmaya-gawa, 50 m, 21.VI.2009, TH, L; 3 males, 1 female, Shizuoka-shi, Enodoshinden, Abe-kawa, 70 m, 25.VIII.1995, TH, L; 33 males, 10 females, Shizuoka-shi, Tawarazawa, Abe-kawa, 130 m, 22.X.1995, TH, L; 88 males, 84 females, Shizuoka-shi, Tawarazawa, Abe-kawa, 150 m, 23.V.1994, TH, L; 4 females, Shizuoka-shi, Yujima, Abe-kawa, 150 m, 19.VIII.1995, TH, L; 2 females, Shizuoka-shi, Nyujima, Abe-kawa, 375 m, 25.IX.1995, TH, L; 54 males, 15 females, Shizuoka-shi, Ashikubo, Abe-kawa, 75 m, Matsuzaki-hashi, 1.VI–25.VII.2005, TH, L; 1 male, Hamamatsu-shi, Mori-machi, Oguni-jinjya, 1.VIII.2005, K. Sugisima. Mie: 7 males, Yokkaichi-shi, Watarai-cho, Miyakawa, 28.V.2001, H. Morita. Kyushu. Kumamoto: 3 males, Takamori-cho, Kigo-no-taki, 3.VI.1999, HN; 1 male, Minami-aso-mura, Hakusui, Nakamatsuike-no-kawa, headwater, 4.VI.2002, AO, S; 6 males, 1 female, Minami-aso-mura, Hakusui, Myojin-ike, Meisuikoen, 19.XI.2001, AO, S; 4 males, 1 female, Minami-aso-mura, Hakusui, Yoshida-jo, 19.XI.2001, AO, S. Miyazaki: 8 males, 1 female, Aya-cho, Yotsue, Honjo-gawa, 21.V.2004, TH, L; 21 males, 20 females, Nobeokashi, Kitagawa-cho, 22.IV.2004, TH, L. Kagoshima: 1 male, 1 female, between Izumi-shi to Akune-shi, 11.V.1999, S. Tsukaguchi.

Remarks. The male of this species is similar to that of H. dejaloni Botosaneanu, 1980 , which occurs in Europe ( Malicky 2004a), in having rounded apico-lateral apodemes on segment IX, the dorsal plate subtriangular, the subgenital plate membranous and stout, and the inferior appendages short with 2 lobes. It is distinguishable from that of H. dejaloni by the shape of the phallic apparatus with its almost straight, elongate subapical process.

Distribution. Japan (Honshu, Kyushu). Endemic to Japan.

Habitat. Adults of this species are collected near streams.

Japanese name. Kakida-hime-tobikera.

Figures

FIGURE 14. Distributions of 12 species of Hydroptila in Japan and adjacent areas. For clarity, nearby collection sites in Japan are grouped together as a single point and the sites are roughly plotted in adjacent, non-Japanese areas.

FIGURES 11 – 12. 11, H. kakidaenisis: A – F, male; A—ventral process, lateral and ventral (only apex); B—genitalia, lateral; C—same, dorsal; D—same, ventral; E—dorsal plate, variation, dorsal; F—phallic apparatus, lateral; G – I, female; G—abdominal segments, VIII – X, lateral; H—same, ventral; I—segment VIII, dorsal. 12, H. botosaneanui: A – F, male; A—ventral process, lateral and ventral (only apex); B—genitalia, lateral; C—same, dorsal; D—same, ventral; E—dorsal plate, variation, dorsal; F— phallic apparatus, lateral; G – I, female; G—abdominal segments, VIII – X, lateral; H—same, ventral; I—segment VIII, dorsal.