A new subspecies of Gandaca harina (Horsfield, [1829]) (Lepidoptera, Pieridae) from Simuk, Indonesia

4 Pages·1999·0.57 MB·

TThhee LLeepipdiopdteorpoltoegircaollSoocgieitycal Society ooff JJaapapnan
uttwt 77ans.1epibStbc,Japan 50 (4)2i43--246S,eptember 1999

A Gandaca harina(Horsfie[l1d8,29]()Lepidoptera,
new subspecies of
Pieridae)from SimuK Indonesia'

Takeo YAMAucm Osamu YATA
and
Biosystemati cLsaboratory ,Graduate School of Socia land Cultura lStudies K,yushu University,
Ropponmatsu, Fukuoka,810-8560Japan

Abstract A new pTominent subspecies of Gandoca harina (Horsfi eiis dde)scribe dfrgm Simuk
of Batu Islands, Mentawai ArchipeLago ,Indonesia ,This subspocies is distinguish efdrom the
known subspecies by the even and very narTow fbrewing biack border in the female.
Key words Pierida e,Coliadinae ,Gandoca, Ganclaca harina ,new subspecies, Simuk, Batu
Islands ,Mentawai Archipelago, Indonesia, tropical rainforest.
Introduction
The genus Ganduca Moore, 1906 censists of two species, the type species G, han'na
(Horsfi e[l1d8,29 ]oc)curring from Assam, Sundaland to the Lesse rSundas, and G butyraya
(Butl e1r87,5) replacing it from Sulawesi to New Guinea (Yata 1,981) . In the course ofour
revisional research on the genus Gandoca, we fbund a new subspecies of Gl han'n aoccurring
in Simuk in the Batu Island slocate bdetween Nias and Siberut ,Mentawai Archipelago,
Indonesia. Hitherto GL hahaa has been classified into four subspecies within Mentawai
Archipelago: diytant Firuhstorfbr ,1910 from Engano and ?Nias ,berttt aCorbet ,1941 from
Siberut ,porana Corbet, 1941 from N,Pagi, and babiensi sHanafUsa, 1994 from Babi,
Therefore ,we have at leas t5subspecie sfrom the Archipelago .This butterf lymainly
inhabjt slowland fores tor around fores tedges probably because it sfood-plan tis P'entilago
oblongrfoha which grows in the forgs t.It seems that fores tspecies oecurring in Mentawai
Archipelago a,long with their remarkable geographic yariation such as G han'na c,an provide
valuable infbrmatio nfbr biogeographi cevaluation and discussio nof this region. In addi-
tion, this fdscinati ncghain of island sis also very important from the viewpoint of diversity
conservation in South-Ea sAtsia, because of the peculiar fauna and flor awith each island
having endemic ta)ca . A waye of lumbering or deforestati oins rapidly spreading to it,
however, and World Wildlif eFund (WWF) has started activities to protec tthe wildlife and
culture of these island swhich it considers a matter of urgency (WWF, I980).
Abbreviation sused for the type depositori eisn the text are as fo11ows.
BLKU-Biosystematics Laboratory ,Graduate School of Socia land Cultura lStudies,
Kyushu Uniyersit yF,ukuoka.
NHM-Natural History Museum, London.

KMNH-Kitakyushu Museum of Natural History ,Kitakyushu.
BOGM-Bogor Museum, Jakarta,

i Contributio nfi;o mthe Biosystemati cLsaboTatory ,Graduate School of Socia land Cultural Studies,
Kyushu Universit y(No .38).
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244 Takeo YAMAucHI and Osamu YATA
Description
(inndaca harina simukensis Yamauchi et Yata, ssp. noy, (Fig 1s-4)
Male (Fig 1s-2) . Upperside :Ground colour pale lemon-yellew ;fbrewing blac kborder
verY narrow, continued from middle of spaoe9 to near vein3, with it sinner edge evenly
blackborder1.3-2.3 7+8 (av=1.6 02-O.5
rounded, width of mm at vein mm, n=6, st=O.4),
mm at vein4 (av:=O.4m mn=,=6, st=O,1). Underside :Ground colour pale lemon-yellow.
Forewing somewhat rounded at apex and dista lmargin slightly convex.
Female (Fig 3s-4). Upperside :Ground colour pale cream, slightly darkened along wing
rnargin; forewing black border evenly very narrow, continued from vein 10 to near vein 2,
itsinner diffused, 4 6,
with edge somewhat weakly projected along veins and width ofblack
border O.6-1. 7mm at vein 7+8 (av= 1.2 mm, n=2, st=O.7), O,4-O. 7mm at vein 4 (av=O.6
mm, n=2, st=O.2), Underside :Ground colour yellowish-pa lceream, Forewing some-
distal
what rounded at apex and margin slightly convex.
Forewinglength.Male,20.0-23.5mm (av=22,Omm, female,20.5-22,Omm
n=7, st=1.0);
(av=21.3 2,
mm, n= st=1,3).
Male genitali (aFi g5.). Although the material shows slight individual variations (n=3),
they are within the range of variation observed for G harina.
Female genitalia . There are no distincti dvieffereno ebsetween G h simukensis ssp. nov. and
Figs 1-4. Gandoca harina simukensts Yamauchi et Yat4 ssp. nov., Simuk [BLKU] . 1. cJn,
holotype .2, Ditto ,underside, 3. \, paratype .4. Ditto ,undeiside.
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A New Subspecie sof Gandaca harina 245
D

Fig .5. Male genitalia of Gandaca harina simukensts Yarnauchi et Yata, ssp. nov. from Simuk.
A: ring (later aB:l )va,lva (inne raspoct of right-hand )C,: superuncus (dorsa l)D:,
phallu s(later Eall:) j,uxt a(poster iEo2r: )j,uxt a(lateral).
G h.han'na,based dissected
on a specimen,
Type locality,Simuk,BatuIslandsM,entawai Archipelago, Indonesia.

Distributio n.This subspecies is restricted to Simuk in it sdistributio nraanlge,
[BLKU].
Holotype. Simuk,1cl,IX.1988,Y.Nishiyamaleg. Paratypes. Samedataas

holotype,6 2 \ [BLKU,NHM, KMNH, BOGM].
cii
Remarks, This new subspecies is similar to subsp. aora Moulton, l923 from Tieman and
Aur, subsp. austrosundana Fruhstorfer ,]9IO fror nLombok and Sumba and subsp, berata
from Siberut ,but can be distinguishab flreom them by the even and very narTow forewing
black border especially in the female . In other subspecies, there is no very narrow forewing
black border in females as oecurs in G h. simukensts ssp. nov.
Aeknowleagements
The firs atuthor expresses his sincere gratitud teo Profs T. Saigusa and H. Shima (BLKU )fbr
their constant guidance and encouragement. The authors thank DrB. J. Sincla i(rBLKU)
who critically reviewed an earlier draf tof this paper.
References
WWF, 1980. SavingStherut:A ConservatibnMaster Plan. 134pp. A World WildlifeFund Report,

Bogor.
Yata, O., 1981. Pieridae. In Tsukada, E. (Ed. )Bu,ttei:IZi eqsf 'the South East Asian Lslands.2: 205-
438, pls 1-84 . Plapac Co. Ltd, Tekyo. (I nJapanese),
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246 Takeo 　YAMAucHI 　and 　Osamu　YATA
摘 要
イン ドネシ ア シム ク島ee　Gandaca 　harina（Horsfield，［1829］）の 1新亜種 （山内健生 ・矢田脩）
，
Gand αca 　harina　simu たensiS 　Yamauchi 　et　Yata，　ssp ．　nov ．
イン ドネシアの メ ン タワイ諸島バ ツ群島のシ ム ク島か ら Gandacα harinaの一新亜種，　 simukensis 　ssp．
nov ．を記載した．本亜種は，雄の翅が淡い レ モ ン色であること，雌の翅表が淡い ク リーム色 裏が黄
ー 一 ，
色みを帯びた淡い ク リ ム 色で ある こ と，雌雄前翅表面の黒帯の 巾が極めて狭く 様で ある こ とな ど
か ら，原名亜種 と容易に区別で きる．特に，本亜種の雌に見られ る前翅表面の非常に狭い 黒帯は他の
い ずれ の亜種に も見られ ない ．本亜種の雌雄交尾器の形態は，Gandaca 　harinaの種内変異の幅に含
．
まれた
（Accepted　April　8，1999）
Publishe　dby　the　Lepidopterological　Society　of　Japan，
5−20，Motoyokoyama 2，Hachioji，Tokyo，192−0063Japan

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