Et1ton1o1ogicalRe、le、、, of Ja/)an 64 (2): 173-179, Dec 30. 2009

Taxonomic Notes on the Lycid Beetles(Coleoptera: Lycidae)from Japan, II

Description of a New Subspecies of Lycostomus(Lycostomus)formosanus PIc from the Ryukyu Islands, Southwest Japan

Kiyoshi MATSUDA15-27 Matsugaoka, Hanayashiki, Takarazuka City

Hyogo Prefecture 665-0801 . Japan

Abstract A new Iycid taxon. L_、,cosro,川Is(L.、,coslo,川Is) /i)1711osa川ls l.f/11ga人,Ia - s subsp nov. is describedfrom the Ryukyu Islands, Southwest Japan. Two new local ities of the nominotypica1 subspecies, L. (L)fol・"lesa川Is le,・111osatuls Plc. 1937: Lutao and Lanyu Islands. Taitung Hsien. Taiwan are reported.

A Taiwanese lycid beetle, Lvcosto1n1ls f()1-n1osanus was originally described by Pie(1937)from“Formose” NAKANE(1973) reported this species based on the PIc's type deposited in theMuseum National d'Hisloire, Paris with his handwriting figures of the head, antenna、 pronotumand male aedeagus. SAT0& MATsUDA(1985) reported L formosanus from Ishigaki-jima Island,the Ryukyu Islands, Southwest Japan. The record was cited by JENG, YANG& SAT0(2002) andBocAKovA & BocAK(2007). Therefore, we recognize the species occurs in Taiwan and Ishi9a-kl-jima Island at present.

In recent years, the author had an opportunity to re-examine a series of the71 specimens ofL (,L) formosanus from Taiwan and Ishigaki-jima Island. After the close examination, he found

several sjgnjfjcant morphological differences between the populations of Taiwan and IShi9aki-jima Island.

In the present paper, the author is going to describe the latter as a new Subspecies, LyCOSto-1njfs (Lycosfomzls) formosanus1s/11ga・lanus subs nov in comparison with the nOminOtyPiCa1subspecies, L. (L)fol・n1osanusfo1'n1osa川Is PIC.

Abbreviations for measurements. HW-head width: E-eye diamete「: DE-distancebetween eyes; pw-maxjmum width of pronotum, PL-pronota11en9th; EW-elyt「al Width athumeri; EL - elytra11ength.

Depositories sEHU - Hokkaido University Museum, SaPPO「o; NSMT- NatiOna1 Muse-

um of Nature and science, Tokyo. 0MNH- 0saka Museum of Natu「al HiStO「y,0Saka; KUM-Kyushu University Museum, Fukuoka; URM-University of the RyukyuS, UniVe「Sity Museum'Nishihara.

174 K ivoshi MATSUDA

Taxonomy

Subfamily Lycinae LAPoRTE, l836Tribe Lycini LAPoRTE, l836

GenusLycostomus MoTsCHULSKY,1861SubgenusLycosto'nしts MOTCHULSKY, 1861

Type specjes. Lycus cocci11eus MoTscuLsKY, 1861 . type locality.Ceylon(=LycuS SinlileS HOPE, 1831 )

Lycostomus (Lycostomus) formosanus formosanus PIC, 1937(Figs 3,8-10, l2)

Lycostomusformosanus PIc, 1937: 147. type locality. Formose; - NAKANE, 1973: 9; - JENG, JANG&SAT0, 2002: l73; - BocAK & MATSUDA, 2003: l476. (Ia「Va).

Lycost()mus(Lycostomus)formosanus: BOKAKOVA & BOCAK,2007:211 .

Diagnosis. Body black to blackish brown, shining, with mandibles and claws Ii9ht reddishbrown; pronotum red with a longitudinal black macula in the middle; elytra unicolor red.

Body surface closely furnished with short, recumbent, light reddish brown Pubescence;antennae closely covered with short, recumbent, grayish pubescence; pronotum and elytra close-ly covered with short, recumbent red pubescence.

Head with long rostrum. Terminal segments of maxillary palpi securiform. Eyes small,oblique in dorsal aspect, moderately prominent. Antennae strongly serrate, not reaching the mid-dle of elytra. Pronotum transverse, subpentagona1; anterior margin slightly produced anteriad;disc weakly convex, widely reflexed at sides, provided with a short narrow longitudinal carina infront. Scutellum subtriangular, feebly incised at apex. Elytra long, strongly diverging posteriad,dehiscent just behind scutellum and separately rounded at apices, each elytron bearing four lon-gitudinal costae; intervals between costae coarsely and irregularly reticulate. Anal sternite elon-gate, gradually narrowed towards apex in male. Terminal abdominal sternite deeply emarginateat apex in female. Legs model'ate in length; femora subclavate; hind tibiae slender, slightlyarched laterad. Male aedeagus very long; median lobe elongate, strongly widened in the distalportion, with a hook-shaped apex; parameres small, attached to the base of median lobe; pha1-lobaselarge, asymmetrical.

Quantitative cha'acte1s. DE/E := 1.4 (male),1.5 (female); relative lengths of 1st to 111hantennal segments from basal to apical:0.3 :0.1 :1.0 :0.7 :0.6 :0.6 : 0.6 :0,7 :0.6 :0.6 :1.2(male),0.3 :0.1 : 1.0: 0.6 :0.6 :0.5 :0.6 :0.5 :0.5 :0.5 :1.0(female); PW/HW= 2.6 (male),2・9 (female); PL/PW - 06 (male),0.6 (female); EL/EW- 3.0(male), 2.9 (female); EL/PL≒5.4 (male), 5.6 (female).

Measuremerlts. Length: l2.1- l8.8 mm; width3.4_5.8 mm.Materia l examined. 1 , Sankuang, Taoyuang Hsien, Taiwan,2. v. 1g78, T KAMAKAR1

Ie9・; l (i7、,1 , Sankuan9, 16. V. 1978, S. INoKAwAleg; 2 , Sankuang, 2g l v 1g7g, sTSUYUKI le9・;1 d'、, Palin9, alt 800 m, Taoyuang Hsien,29. VI.1989, M TANIKAD01eg; 1 早,Mt・ KuantaOShan, NantOu Hsien, Taiwan, l4. IV.1973, K. MATsUDAleg;1 , Nanshanch1, alt800 m, NantOu HSien,17. IV. l974, K. SUGIN01eg; l (j'1, Nanshanchi,21. V.1g74, K MATsUDAIe9・; 1 , 2 , NanShanchi,1-4. VII i974, T. 0cH1leg;7 (j7、 , 1 , Nanshanch1, 8 v g75,K・ MATSUDA le9・; 1 , NanShanchi, 1. V. 1979, M. TOYAMA leg;3 , Nanshanch1, 3 I v

New L_、Costo'tlu.s、 from the Ryukyu Islands

2

3

5

6

7

8

l

1

11

12

Figs. 1-12. L_、'cos1o″ ttls (L、'・' - t,ソ'u ,) fo,・〃,o. a,,l sLbspp., (11、 . - l . Head; 2,3. Pronotum; 4. Antenna;5, 8.Aedeagus in ventral view: 6, 9. same in lateral view;7,10. same in dorsal view; ♀♀一l l , 12. Terminalabdominal sterni te; 1, 2, 4, 5-7, 11. L (」L ) fol・mosan11s lshigaklanus subsp nov ; 3, 8-10, 12. L. (L) fo,--mosantls fo,・mosarulsPlc. Scale:1 mm.

1

1

175

17 6 Kiyoshi MATsUDA

l986, M. 0HARA leg; l , 1 早, Lushan Hot Springs, alt. l,200 m, Nantou Hsien,3-5. V. 1974,K . SuGIN01eg; 1 , Lushan Hot Springs,3. V.1975, S. TAKEDAleg; l (i'、,3 早, Lushan HotSprings, 8-10. V. 1975, K. MATsuDA leg; l 早, Sungkang, alt. 1,950m, Nantou Hsien,7. IX.1991, M. TANIKAD01eg; 1 , 2早 , Sungkang, Nantou Hsien,20. IV.1997, C. LoUleg;1 ,

Meifeng, alt 2200 m, Nantou Hsien,22. VI.1994, N. 0KUDAleg; 1 早, Tsuifeng, alt 2,300 m,Nantou Hsien, 22. VI. 1978, H. AKIYAMA leg; 1 , Tehuashe, alt 800 m, Nantou Hsien, 20. IV.1981, S. TsUYUKl leg; 7 (j1、, Liukuei, Kaohsiung Hsien, Taiwan, 18. V. l975, K. MATsUDAleg; 1 , Tengchih, alt 2,000 m, Kaohsiung Hsien,20. IV.1981, W. CHENG, leg ;1 , KentingPark, Pintung Hsien, Taiwan,16. V.1975, K. MATsuDAleg;1 , Chihpen Hot Springs, TaitungHsien, Taiwan, 11. 111. 1971, K. MATsuDA leg; 2 , Chihpen Hot Springs, 20. V. 1975, S.IMAsAKA leg; 1 , Taipingtsun, Taitung Hsien, 11. VII i973, T. 0cHI leg; 2 , Lanyu Is.,Taitung Hsien, 24-25. VII i990, M. TANIKAD01eg. (first record); 1 , 1 早, Lutao Is., TaitungHsien, 30. 111. 1971, M. MIHARA leg. (first record); 1 , Lutao Is., 23. VII i990, M. TANIKADoleg;1 早, Juisui, Hualien Hsien, Taiwan,15. V.1974, K. SuGINo leg;1 , Juisui, 26. V. 1974,K. MATsUDAleg;1 早, Juisui,8. VII i974, S. TAKEDAleg ;1 , Juisui, 16. V. 1975, S. IMASA-KAle9.

Distribution. Taiwan: the main island, Lanyu Island and Lutao Island.Remarks. Lycostomus (Lycostomu.s) fo,1nosanus formosanus PIc occurs throughout Tai-

wan, mainly lowlands to mountaineous areas, but is rarely found in altitudinous areas over 2000m. This time the author reported the species occurs not only in the main island of Taiwan, butalso occurs in the adjacent islands such as Lanyu Is. (Orchid Is) and Lutao Is. (Green Is ). Hecould not found any significant differences between populations of the main island and the lattertwo islands. Three specimens from Lanyu Is and Lutao Is. show the pronotum and elytra unicol-or red, but they have the male aedeagus with median lobe strongly widened in the distal portionas well as the specimens of the main island of Taiwan. Lycostolnus (Lycostomus) formosanusformosanus PIc has wide variations on pronota1 form and body colour. Generally this speciesseems to have a tendency of developing light colored portions of pronotum and abdomen fromnorth to south in Taiwan. PIc's type clearly belongs to the light colored type judging from theoriginal description and the figures of type (male) drawn by NAKANE(1973). Therefore, theauthor considers the specimens from Lanyu Is and Lutao Is as belonging to the nominotypica1subspecies in the present paper.

Lycostomus (LyCOStOmus) formosanus ishigaki,anus MATsUDA, subsp nov(Figs. l,2,4-7,11)

LyCOStOmtlSfO「n10Sa'1uS: SAT0& MATSUDA, lg85:g4; - JENG, YANG& SAT0 2002: 173LyCOSto'mlS(LyCOStOmuS)fo「mosanus: BocAKovA & BocAK 2007: 211

Desc「iPtiOn・ Body black to blackish brown, shining, wjlh mandjbles and claws11oht reddish b「own; P「onOtum 「ed With alon9itudina1 black macula in the middle; elytra red except forthe bases of sutural rims blackjsh

Body Su「face C1oSelyfu「niShed with short, recumbent,1jght reddish brown pubescence;antennae Closely Cove「ed With Short, recumbent, grayish pubescence; pronotum and elytra close_1y Cove「ed With short, recumbent red pubescence

Ne、v L、・c ).It ,niff 「rom the Ryukyu Island.、 l 77

Head with long rostrum. Terminal segment of maxillary palpi securi form. Eyes small,oblique in dorsal aspect, moderately prominent. Antennae strongly sen-ate, not reaching the mid-dle of elytra. Pronotum transverse, semielliptical; anterior margin roundly arched; disc weaklyconvex, widely reflexed at sides. provided with a short narrow longitudinal carina in front.Scutellum subtriangular, widely rounded at apex. Elytra long, strongly diverging posteriad,dehiscent just behind scutellum and separately rounded at apices; each elytron bearing four lon-gitudinal costae: intervals between costae coarsely and in-egularly reticulate. Anal sternite el on-

gate, gradually narrowed towards apex in male. Terminal abdominal sternite shallowly emar-ginate at apex in female. Legs moderate in length; femora subclavate; hind tibiae slender, slight-ly arched laterad. Male aedeagus very long; median lobe elongate, slightly widened in the distalportion, with a hook-shaped apex; parameres small, attached to the base of median lobe; pha1-1obase large, asymmetrical.

Quantltatt、'e characte1-s. DE/E - 15 (male).1.7 (female); relative lengths of 1st to 11thantennal segments from basal to apical: 0.3 : 0.1 : 1.0 : 0.7 : 0.7 : 0.7 : 0.7 : 0.7 : 0.7 : 0.6 : 1.4(male), 0.3 : 0.1 : 1.0: 0.6 : 0.6 : 0.6 : 0.7 : 0.7 : 0.6 : 0.6 : 1.2 (female)、 PW/HW= 2.6 (male),2.3 (female); PL/PW - 07 (male), 0.7 (female); EL/EW - 2.8 (male), 2.8 (female) ; EL/PL -5.1 (male), 5.4 (female).

Measu,・ements. Length:14.7-17.2 mm; width4.4-5.4 mm.Type so,-1es. Holotype: , Takeda-rindo, Ishigaki-jima Is., Okinawa Prof., Ryukyu

Islands, Southwest Japan, 23. 111. 1992、T. HANATANI leg. The holotype is deposited in the col-lection of the Hokkaido University Museum, Sapporo. Paratypes: 1 , Mt. 0moto-dake, Ishiga-ki-j ima Is., Okinawa Prof., Ryukyu Islands, Southwest Japan, 15. VIII. 1961. M. MoGI leg; 2(j;'、, Mt. 0moto-dake, 6. V. 1978. M. YAGI leg; 1 , Mt. 0moto-dake, 29-30. V. 1997, M.TAKAKUwA leg; 2 , Takeda-rindo, Ishigaki-jima Is., 13. IV. 1991, T. HANATANI leg. (1 .

NSMT); 2 , 1 早, Takeda-rindo, 22. 111. 1992, T. HANATANl leg. (1 . 0MNH); 4 ,

Takeda-rindo,23. 111. 1992, T. HANATANI leg. (1 . KU M & 1 . URM).Dist1・ibut1on. Ishigaki-jima Is., Ryukyu Islands, Japan.Ety1no1og、,. This new subspecies is named after the type locali ty, Ishigaki-j ima Island.Rema1-ks. This new subspecies is closely rerated to the nominotypicaI subspecies, but can

be distinguished from the latter by the following characteristics:1) bases of the sutural rims ofelytra blackish in color,2) antennae wider in length,3) pronotum not strongly produced apicad,4) elytra shorter in length,5) male aedeagus with median lobe not strongly widened in the distalportion,6) terminal female abdominal stemite shallowly emarginate at apex.

The holotype and four paratypes were collected from on the f1oweres of Melioslna old-hami1 MIQ ex MAXIM. in a wet subtropical forest in Ishigaki-jima Island.

Acknowledgements

The author thanks Drs. Masahiro OHARA, Hokkaido, Masatoshi TAKAKUWA, Kana9aWa,Akjko sAIT0, Chjba and Messrs. Masao TOYAMA, Tokyo, Hideo AKIYAMA, KanagaWa, TetSujiKAMAKAR1, Kanagawa, Sjge0 TsUYUKl, Kanagawa, SigenO「i INOKAWA, Nagoya, Sige「u TAKEDA,shjga, Teruo OcHl,Osaka, Norio OKUDA,Osaka, Motohiko TANIKADo,Osaka, MaSato MIHARA・Osaka, Masamichi YAGI+,Osaka, Syoichi IMAsAKA, Fukuoka, Tatsuro HANATANI,Okinawa・Kojchj sUGINo, 0kjnawa, Japan for providing many interesting materials for his taxOmOniC Study・

178 Kiyoshi MATsUDA

要 約

松田 潔 : 日本産べニボタル科甲虫の分類学的覚書, n. - 沖縄県石垣島産のタイワンベニボタルLycostomus(Lycostomus) formosanus PIc,1937 を再検討した結果, 外部形態並びに雄交尾器等に安定した差異が認められたので, 新亜種L. (L ) formosanus lshlgakianus subsp n o v .

として命名記載した. また, 台湾産の基亜種L. (.L) formosanusformosanusPlcについて, 台束縣緑島と蘭嶼島の分布を記録し, 台湾本島産とは明瞭な差異が認められないことを示した.

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(Received October 17.2009: Accepted November27,2009)