今坂正一の世界
九州の昆虫
自然環境アセスメント
おたより・ログイン

Pidonia neglecta hizena n. subsp., a New Subspecies from Western Kyushu, Japan (Coleoptera, Cerambycidae)*

Shoichi Imasaka
Entomological Laboratory,Graduate School of Bioresource and Bioenvironmental Science, Kyushu University. Fukuoka, 812-8581 Japan.

and
Masatsugu Amano

Pidonia neglecta Kuboki, 1982, previously known as Pidonia muneaka Tamanuki, 1942, has been knonwn from Shikoku and Kyushu (the type-locality: Daisen-rindo, Mt. Kuju) and is found in the mountainous areas from 300 to 1000 m above sea level. This species was recorded by Imasaka (1978) in Mt. Unzen, western Kyushu,
*Contribution from the Entomological Laboratory, Faculty of Agriculture, Kyushu University, Fukuoka (Ser. 5, No. 53).
together with 7 other species of the genus Pidonia, based 14 specimens collected from flowers of Sorbus commixta Hedlund, Stephanandra incisa Zabel [Rosaceae], and Symplocos coreana Ohwi [Symplocaceae].
Amano (1996a) examined the genitalia of two male specimens that were collected from Mt. Unzen on other occasions and found a small ventral process at the apex of the median lobe in the male genitalia, while it is absent in the males from Mts. Hiko and Sobo. In addition, Amano (1996b) noted the absence of this process in a male from Mt. Taradake, where is a neighboring mountain of Mt. Unzen. However, we found later the process in the specimens from Mt. Taradake.
A careful examination of this process and other features using a plenty of specimens collected from various localities in P. neglecta distribution range revealed that there are morphological differences between populations from western Kyushu and other localities. Based on these results, we reached a conclusion that the population of western Kyushu should be described as a new subspecies of P. neglecta.

Pidonia (Pidonia) neglecta hizena Imasaka et Amano, ssp. nov.
[Japanese name: Himiko-hime-hanakamikiri-nishikyushu-ashu]
(Figs.1, 2, 7, 8, 9,10, 11)

Pidonia neglecta : Ogata et all, 1986, Saga-no-Konchu, (18): 131 (Okuhiratani, Mt. Taradake and Mt. Kyogatake, Mts. Taradake, Saga Pref.), −Imasaka et all, 1987, Saga-no-Konchu, (19): 235 (Mt. Taradake, Saga Pref. And Nagasaki Pref.),−Amano, 1996a, Shin-tsukushi-no-konchu, (5): 13-14, 2 photos (Nitatoge, Mt. Unzen, Nagasaki Pref.). −Amano, 1996b, Gekkan-mushi, (310): 11, 1 photo (Mt. Kyogatake, Mts. Taradake., Saga Pref.).
Pidonia muneaka : Imasaka et Iwasaki, 1974, Kitakyushu-no-konchu, 20(2): 41 (Mt. Unzen, Nagasaki Pref.), −Imasaka, 1977, Koganemushi, (31): 35 (Todoroki-no-taki, Mt. Taradake, Nagasaki Pref.), −Imasaka, 1978, Koganemushi, (32): 1-15 (Mt. Unzen, Nagasaki Pref.).
Male. Body elongate and brownish yellow; head behind antennal sockets, meso- and metasterna, 1st and 2nd ventrites and lateral portions of 3rd ventrites blackish brown; sometimes tarsi and apices of tibiae and femora blackish brown; pronotum brownish fulvous with blackish brown spots at lateral margins; scutellum brownish fulvous; elytra brownish yellow with black stripe at suture, with three blackish spots along lateral side and blackish marking at the apex ( Fig. 1).
Fifth ventrite roundly produced caudad on each side of acute median notch at caudal margin ( Fig. 10).
Male genitalia moderatey sclerotized; median lobe relatively slender, curved ventrally, with an acute and small prominence ventrally at apex ( Figs. 7, 8); tegmen shorter than median lobe with dense short terminal hairs ( Fig. 9).
Length: 8.3-11.2mm; breadth: 2.3-2.9mm.
Female. Robuster and darker than in male; elytra black with brownish yellow stripe in middle ( Fig. 2); antennae barely attaining elytral apices; pygidium more rounded at caudal margin, with slight emargination in middle; fifth ventrite rounded at caudal margin ( Fig. 11).
Length: 7.8-11.1mm; breadth: 2.1-3.0mm.

Type series. Hollotype: male (Type No.3125, Kyushu Univ.), Mt. Unzen, Obama Town, Nagasaki Pref., Kyushu, Japan, 8.VI.1976, S. Imasaka leg. Paratypes: [Saga Pref.] 1 female, Mt. Kusenbuyama, Tosu City, 12.VI.1983, M. Nishida leg.; 2 males, Mt. Hachimandake, Taku City, 4.VI.1999, F. Hirokawa leg.; 1 male, Mt. Taradake, 1-30.VI.1969, M. Ejima leg. (Kitakyushu Mus. Hist. Coll.); 1 male, Mt. Kyogatake, 22.V.1982, N. Nishida leg. (Kitakyushu Mus. Hist. Coll.); 1 male, Hiratani, Mt. Kyogatake, 11.V.1985, F. Hirokawa leg.; 1 female, Okuhiratani, Mt. Taradake, 29.V.1983, M. Nishida leg.; 1 female, Ditto, 3.V.1985, M. Nishida leg.; 1 female, Mt. Taradake, 6.VI.1981, M. Nishida leg.; 1 female, Ditto, 4.VI.1994, M. Nishida leg.; [Nagasaki Pref.] 1 male, Minamikawachi-rindo, Mt. Taragake, Ohmura City, 4.VI.1985, S. Imasaka leg.; 2 females, ditto, 10.V.1986, S. Imasaka leg.; 1 female, Todoroki-no-taki, Mt. Taradake, Takagi Town, 31.V.1978, S. Imasaka leg.; 1 male, Ditto, 4.V.2000, S. Imasaka leg.; 1 male, Ditto, 5.V.2000, S. Imasaka leg.; 1 male, Kinsenji, Mt. Taradake, Takagi Town, 4.V.1998, S. Imasaka leg.; 1 male, Nita-toge, Mt. Unzen, Obama Town, 9.VI.1975, D. Iwasaki leg. (Kitakyushu Mus. Hist. Coll.); 2 males, same data of hollotype; 2 females, same locality, 6.VI.1977, S. Imasaka leg.; 1 male, Ditto, 1.VI.1983, S. Imasaka leg.; 1 male, 1 female, Ditto, 12.VI.1986, S. Imasaka leg.; 1 female, Ditto, 31.V.1989, S. Imasaka leg.; 1 female, Nodake, Mt. Unzen, Obama Town, 14.VI.1994, S. Imasaka leg.; 1 male, Akamatsu-dani, Mt. Unzen, Shimabara City, 14.V.1980, S. Imasaka leg.; 1 male, Tashirobaru, Unzen, Kunimi Town, 7.V.1991, S. Imasaka leg..
Distribution. Japan: Western Kyushu (Saga Pref., Nagasaki Pref.).

Remarks. This new subspecies resembles nominate subspecies Pidonia (Pidonia) neglecta neglecta (Kuboki, 1982) from other localities (Figs. 3-6, 12-21) than western Kyushu. However, the median lobe of male genitalia is produced ventrally at the apex; the fifth ventrite of abdomen is more sharply depressed and more acutely notched at the center in the male. The pygidium is more rounded at the apex in the female. General coloration is paler in both sexes.
Biodata. The adults appear from May to June, and visit flowers of Sorbus commixta Hedlund, Stephanandra incisa Zabel and Symplocos coreana Ohwi.

Etymology. The subspecies is named after the old name of locality.

Specimens of the nominate subspecies examinined: KYUSHU: 4 males, 2 females, Mt. Kurodake, Mts. Kujuzan, Oita Pref., 6.VI.1992, M. Nishida leg.; 2 males, 2 females, Notoge Pass, Mt. Hikosan, Fukuoka Pref., 20.V.1992, S. Imasaka leg.; 1 female, Siiya-toge Pass, Yabe Vill., Kumamoto Pref., 6.VI.1989, S. Imasaka leg.; 1 male, 1 female, Mt. Goyodake, Hinokage Town, Miyazaki Pref., 15.VI.1996, S. Imasaka leg.; SHIKOKU: 2 males, 1 female, Mt. Ishizuchiyama, Saijyo City, Ehime Pref., 29.VI.1997, M. Shiraishi leg.; 1 female, Mt. Higashi-akaishiyama, Besshiyama Vill., Ehime Pref., 11.VI.2000, M. Shiraishi leg..
Acknowledgements
I wish to express my hearty thanks to Dr. Katsura Morimoto (Professor Emeritus of Kyushu University), for his kind guidance and constant encouragements. Special thanks are due to Prof. Junichi Yukawa (Entomological Laboratory, Faculty of Agriculture, Kyushu University), Associate Prof. Osamu Tadauchi (Entomological Laboratory, Faculty of Agriculture, Kyushu University), Mr. Mitsuyasu Nishida (Ureshino Town, Saga Pref.), Mr. Masaharu Noda (Nagasaki City), Mr. Fuminori Hirokawa (Yamato Town, Saga Pref.) and Mr. Masato Shiraishi (Imabari City, Ehime Pref.) for their kind guidance and valued specimens and also with literature.

References
Amano, M. et all, 1963, Enumeration of Coleoptera from Mt. Syoji and Fukakura Valley 1. Kitakyushu-no-konchu, Kitakyushu, (10): 44 (In Japanese).
Amano, M., 1976, Additions to "Enumeration of Coleoptera from Mt. Syoji and Fukakura Valley 1". Kitakyushu-no-konchu, Kitakyushu, 22(1): 16, figs. 3. 4. 5. 8. 9. 11  (In Japanese).
Amano, M.,1996a, Notes on Pidonia neglecta Kuboki and its related two species collected from Unzen-nita-toge. Shin-tsukushi-no- konchu, Fukuoka, (5): 13-14  (In Japanese).
Amano, M., 1996b, Notes on Pidonia neglecta Kuboki collected from Mt. Kyogatake, Mts. Taradake. Gekkan-mushi, Tokyo, (310): 11 (In Japanese).
Imasaka, S., 1977, The beetles collected from Mt. Taradake in 1977. Koganemushi, Nagasaki, (31): 29-39 (In Japanese).
Imasaka, S., 1978, On the genus Pidonia from Shimabara Peninsula. Koganemushi, Nagasaki, (32): 1-15 (In Japanese).
Imasaka, S. & D. Iwasaki, 1974, The longicorn-beetles from Shimabara Peninsula (II). Kitakyushu-no-konchu, Kitakyushu, 20(2): 39-52 (In Japanese).
Imasaka, S., Ogata, K. & M. Nishida, 1987, The fauna of beetles from Mt. Taradake, Kyushu. Saga-no-Konchu, Saga, (19): 176-282 (In Japanese).
Kuboki, M., 1982, A taxonomic revision of the alticollis group of the genus Pidonia (Col., Cerambycidae) from Japan and its adjacent regions. Kontyu, Tokyo, 50(1): 1-9.
Ogata, K., Nishida, M. & S. Imasaka, 1986, The beetles collected from Mt. Taradake, Saga Pref. Kyushu. Saga-no-Konchu, Saga, (18): 117-140 (In Japanese).

摘要
西九州産のヒミコヒメハナカミキリは、雄交尾器のメデイアンローブ先端腹面側に小突起が存在すること、雄腹節の第5腹板において、後縁中央の抉れはより鋭角的に抉れること、雌の第5腹節においては、背板の後縁はより丸みが強いこと、などで大分県九重山を基産地とする原亜種とは区別され、Pidonia (Pidonia) neglecta hizena Imasaka et Amanoとして、新亜種の記載を行った。
西九州(新)亜種は背振山系、多良山系、雲仙山系に分布しており、福岡−大牟田ラインを境界として、英彦山山系以東に分布する原亜種と棲み分けていると考えられる。なお、四国産についても愛媛県石鎚山の個体を調査したところ、原亜種によく似ていて、メデイアンローブ先端に小突起はなく、原亜種に含まれると考えられる。

Explanation of Figures
Figs.1-6, Dorsal view, 1.3.5. Male, 2.4.6. Female; 1.2. Pidonia (Pidonia) neglecta hizena Imasaka et Amano, ssp. nov., 3.4. Pidonia (Pidonia) neglecta neglecta Kuboki, 1982 ( from Mt. Kurodake, Mts. Kujuzan, Oita Pref.), 5.6. Ditto, ( from Mt. Ishizuchisan, Ehime Pref.).
Figs.7-11. Pidonia (Pidonia) neglecta hizena Imasaka et Amano, ssp. nov.; 7-10. Male, 11. Female. −7. Median lobe, ventral view, 8. Median lobe, lateral view, 9. Tegmen, dorsal view, 10. Apex of fifth ventrite, 11. Apex of pygidium.
Figs.12-16. Pidonia (Pidonia) neglecta neglecta Kuboki, 1982 ( from Mt. Kurodake, Mts. Kujuzan, Oita Pref.); 12-15. Male, 16. Female. −12. Median lobe, ventral view, 13. Median lobe, lateral view, 14. Tegmen, dorsal view, 15. Apex of fifth ventrite, 16. Apex of pygidium.
Figs.17-21. Pidonia (Pidonia) neglecta neglecta Kuboki,1982 (from Mt. Ishizuchisan, Ehime Pref.); 17-20. Male, 21. Female. −17. Median lobe, ventral view, 18. Median lobe, lateral view, 19. Tegmen, dorsal view, 20. Apex of fifth ventrite, 21. Apex of pygidium.
Fig.22, Distribution map of Pidonia (Pidonia) neglecta Kuboki, 1982
○: neglecta s.str., ●: hizena ssp. nov..


前のページ
こがねむし, (65), 2001 長崎昆虫研究会
コンテンツのトップ 次のページ
Taxonomic Study of the Genus Hatchiana in Japan (Coleoptera, Cantharidae, Podabrini)