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Opilionid Fauna of Hokkaido and Its Adjacent Areas (With 27 Text-Figures and 4 Tables)

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Opilionid Fauna of Hokkaido and Its Adjacent Areas (With 27 Text-Figures and 4 Tables) Title Opilionid Fauna of Hokkaido and Its Adjacent Areas (With 27 Text-figures and 4 Tables) Author(s) SUZUKI, Seisho; TSURUSAKI, Nobuo Citation 北海道大學理學部紀要, 23(2), 195-243 Issue Date 1983-03 Doc URL http://hdl.handle.net/2115/27679 Type bulletin (article) File Information 23(2)_P195-243.pdf Instructions for use Hokkaido University Collection of Scholarly and Academic Papers : HUSCAP Opilionid Fauna of Hokkaido and Its Adjacent Areas1),2) By Seisho Suzuki and Nobuo TsurusakP) 17-2, Nishihakushima-cho, N aka-ku, Hiroshima-shi 730 and Zoological Institute, Hokkaido University (With 27 Text-figures and 4 Tables) Compared with the other regions of Japanese Islands, our knowledge with regard to the Opiliones of Hokkaido and its adjacent areas, namely, the northern­ most part of Honshu, Sakhalin, and Kurile Islands has been rather poor, in spite of its importance for the understanding of the formation of opilionid fauna in all over Japanese Islands. For this reason, we have engaged since 1975 in the faunal survey of Opiliones in Hokkaido and the northernmost part of Honshu. Some of the material collected through this survey were separately studied and published by Suzuki together with the specimens from the other areas (Suzuki 1976b, 1976c, 1976d etc.). Here it seems significant and convenient for further studies of opilionid fauna in these areas to incorporate all the species hitherto found into one article. In the present study, newly found species are described and reclassification of some species is presented. For the specific revision numerous specimens including types, most of which are deposited in the European museums were examined. As a result, 23 species (25 species and subspecies) of Opiliones were recognized to occur in these areas (19, 15, and 5 species from the northernmost area of Honshu4), Hokkaido, and Sakhalin, respectively. Explanations. 1) Asterisked: Newly recorded forms from Hokkaido (*) and the northernmost area of Honshu (**). 1) Supported in part by a Grant-in-Aid for Fundamental Scientific Research (No. 054195 and 254252) to S. Suzuki from the Ministry of Education, Science and Culture of Japan. 2) Studies on the taxonomy and biology of Leiobunum curvipalpe-group (Leiobuninae, Opiliones) II. (by N. Tsurusaki) 3) To whom reprint requests should be sent. 4) In this study "The northernmost area of Honshu" refers to three northern prefectures (Aomori, Akita, and Iwate) in Tohoku district. (cf. Fig. 1) Jour. Fac. Sci. Hokkaido Univ. VI, Zool. 23 (2), 1983. 195 196 S. Suzuki and N. Tsurusaki Is. o 20Dkm '---~-----" 1, Mt, Rishiri 16. NakOlyruna toge 2. Horonohe 17. Tomakomai 3. Bifuka 18. Mt. Yotei 4. Mt. Rausu 19. Kuromatsunai 5. Kawayu Spa 20. Ohnuma Park 6. L. Akan 21. Hakodate 7. Akkeshi 22. Dsorezan 8. Honbetsu 23. Tsugaru-odai 9. Sounkyo 24. Asamushi 10. Yukomanbetsu 25. Mt. Iwaki 11. Asahikawa 26. Mt. HakkOda 12. Mt. Poroshiri 27. L. Towada 13. Aoyama-chil3 28. ML Hachiman tai 14. Nopporo 29. L. Tazawa 15. Maruyama 30. Mt. Hayachine Fig. 1. Map showing Hokkaido and its adjacent areas. Provenance of principal materials used in the present study is given. 2) Synonymic lists involve only the original description and some principal papers. 3) Collecting data are given by the following order: Locality, altitude of locality if necessary, number of individuals (j=juvenile), date collected (year is given by a number of lower 2 figures: e.g. 1981=81), collected by (SS=S. Suzuki, NT=N. Tsurusaki). 4) Abbreviations: 2MB=Zoological Museum, Berlin; SMF=Senckenberg Museum, Frankfurt/Main; ZMH=Zoological Museum, Hamburg; ZLHU=Zoological Laboratory, Hiroshima University, Hiroshima; L=length, W=width; Tr=trochanter, Fe = femur, Pa=patella, Ti=tibia, Mt=metatarsus, Ta=tarsus. Suborder Laniatores Superfamily Travunioidea Family Triaenonychidae Subfamily Paranonychinae Kainonychus akamai akamai (Suzuki, 1972) Peltonychia akamai Suzuki, 1972e, p. 38 (in part, figs. 1, 3, 5, 6, 9, 10, 13, 14). [Type­ locality: Oiwake, Tabayama-mura, Yamanashi pref., Honshu] Opilionid Fauna of Hokkaido 197 Kainonychus akamai akamai: Suzuki, 1975, p. 72, fig. 4; 1976b, p. 184. Distribution. Honshu (Nagano, Yamanashi, Gunma, and Iwate prefectures). Notes. In Tohoku district so far known from only Mt. Hachimantai, at 1580 m in alt., Iwate pref. This species is sympatric with Mutsunonychus fuscus at Mt. Hachimantai. Kainonychus akamai esoensis Suzuki, 1975 Peltonychia akamai: Suzuki, 1972e, p. 38 (in part, figs. 2, 4, 7, 8, 11 12). Kainonychus akamai esoensis Suzuki, 1975, p. 74, fig. 5. [Type-locality: Mt. Poroshiri, Hokkaido] Specimens examined. HOKKAlDO. Mt. Poroshiri, 850",860 m (5 ~ 6~ 3j, 14-Vl-81, NT). Distribution. Hokkaido (Mt. Poroshiri, above 850 m in alt.) Notes. So far known from only type-locality. Subfamily Kaolinonychinae Mutsunonychus fuscus Suzuki, 1976 Mutsunonychus fUscuS Suzuki, 1976b, p. 178, figs. 1-25. [Type-locality: Sukayu Spa, Hakkoda area, Aomori pref., Honshu] Specimens examined. AOMORl PREF. Tsugaru-6dai, 40 m (1~, 15-lX-78, NT); Asamushi, Hachiman.gu (11(, 23-VII-81, NT); Mt. lwaki, 1000 m (1~, 12-lX-78, NT); SukayuSpa, 740~900m (1~11(, 9-lX-78, NT); Nenokuchi, L. Towada(I~, 17-VII-77, SS). - AKITA PREF. Haruyama, L. Tazawa, 250 m (lj, 25-VIII-80, NT). - !BARAKI PREF. Mt. Yamizo, 800 m (11(, 26-XII-79, H. Kobari). - NAGANO PREF. Otanomosunodaira, Shiga-kogen (1 ~, 20-X-67, M. Shiba); Togakushi, Chusha, 1200 m (11(, 23-VII-80, NT). Distribution. Honshu (Nagano, Ibaraki, Akita, and Aomori prefectures). Notes. This species was so far known only from Aomori and Akita prefectures. However, further occurrence in Ibaraki and Nagano prefectures was recorded in this article. Suborder Palpatores Superfamily Caddoidea Family Caddidae Subfamily Caddinae Caddo agilis Banks, 1892 (Figs. 2-5) Caddo agilis Banks, 1892, p. 249, figs. 1-6. [Type-locality: Long Island, New York, U.S.A.]; Roewer, 1912, p. 33, fig. 9 in pI. 1, figs. 3, 10, 12 in pI. 2; 1923, p. 712" figs. 889a, b; 1957, p. 331; Bishop and Crosby, 1924, p. 83, fig. 3; Bishop, 1949, p. 175, figs. 198 S. Suzuki and N. Tsurusaki 9-14; Suzuki, 1958c, p. 226, figs. 1-6; 1976d, p. 264; Gruber, 1974, p. 238, figs. 1- 22a; Shear, 1975, p. 70, figs. 1-4. Caddo glaucopis Crosby, 1904, p. 253; Roewer, 1923, p. 713. Specimens examined. HOKKAIDO. Mt. Poroshiri, 850 m (Ii, I4-VI-81, NT); Koryu-kozan, Eniwa-shi (1\2, 27-VII-78, NT); Maruyama, Sapporo-shi (21l, 4-VII-80, NT); Nopporo, Ebetsu-shi (lOll, 20-VII-78; 2 SI501l118j, 25-V ~ 8-VIII-79; 601l, 6-VII -80, NT). - AOMORI PREF. Asamushi, Hachiman-gu (Ill, 2/3-VII-82, NT). Distribution. Japan (Hokkaido, Honshu, Shikoku), Eastern part of North America. Detailed localities are listed in Suzuki (1976d) and Shear (1974). This species is disjunctively distributed in Japan and the eastern area of North America. Hitherto no male was found for this species except for one which was collected from Pennysilvania, U.S.A. (Gruber 1974, Suzuki 1976d). However, the junior author has found two males of this species among the numerous specimens collected from Nopporo, Hokkaido, in the course of his periodical field surveys on phenology of some opilionid species at there in 1979. A close examination revealed that these males are so perfectly equal in detail with Gruber's description (op. cit.) of the male from Pennysilvania. This supports the former specific assignment of Japanese specimens to Caddo agilis, which was first recorded from the northerneast area of North America (Suzuki 1958c, 1976d, etc.). Description of these newly collected males is given below. Measurements (in mm, for comparison measurements of females (n=10) based on Nopporo specimens are presented in parentheses). Body L: 1.88-2.07 (2.34-2.53, x=2.44). Cephalothorax: 0.81-0.83 (0.83-1.10, x=0.93) L; 0.90-1.04 (1.10-1.28, x=1.18) W. Abdomen W: 0.98-1.05 (1.12-1.32, x=1.21). Eye tubercle: 0.€O-0.62 (0.61-0.64, x=0.628) L; 1.01-1.03 (1.03-1.07, Fig. 2. Caddo agilis Banks. A-B) Dorsal and lateral views of male. C) Lateral view of female. (Nopporo) All X 10. Opilionid Fauna of Hokkaido 199 Fig. 3. Caddo agilis Banks, lateral view of male (Nopporo). x=l.06) W including eyes. Length of palp and legs (1 t ; in parentheses ~, mean, n= 10): Tr Fe Pa Ti Mt Ta Total Palp 0.34 0.59 0.51 0.53 0.91 2.88 (0.24) (0.45) (0.42) (0.42) (0.64) (2.18) Leg I 0.27 1. 06 0.39 1. 62 2.44 3.08 8.86 (1. 08) II 0.27 1. 63 0.48 2.17 3.23 4.16 11. 94 III 0.23 1. 20 0.41 1. 80 3.14 3.84 10.62 IV 0.23 1. 38 0.40 2.09 3.78 5.04 12.92 Male. Body from lateral as in Figs. 2B and 3; much resembling female but with smaller and more compact abdomen, and with longer legs (cf. description of female in Suzuki 1958c). Second thoracic segment with two minute median setae as in female. Chelicera as shown in Fig. 4A; basal segment ventrally with a blunt, hair­ tipped cone, distal segment with only sparse hairs. Palp as in Fig. 4B-C; massive and larger than in female. Trochanter hairy, hairs more numerous and stronger ventrally than dorsally, bristle-shaped. Femur, differing from female, without a medio-apical apophysis but a strong finger­ like protuberance arising obliquely toward medial direction on the ventral side; hairy, especially ventrally with longer and stronger bristles. Patella, tibia and tarsus bearing thick arranged pegs on ventro-mesal surface; pegs strongly sclerotized, blackish, arising on a low ring-shaped elevation (These pegs are absent in female).
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