Table Of ContentA new species of the genus Glossobius
(Isopoda, Cymothoidae) from coetid fish caught
in the sea near Tokyo, Japan
journal or Bulletin of the Toyama Science Museum
publication title
number 24
page range 29-32
year 2001-03-25
URL http://repo.tsm.toyama.toyama.jp/?action=repos
itory_uri&item_id=762
富山市科学文化センター研究報告第24号,pp,29-32;(2001}
ANewSpeciesoftheGeImsα“”〃“(Isopoda,Cymothoidae>
fmmcoetidnshcaughtintheseanearTokyO,Japan*
NoboruNUNOMURA
TovamaScienceMuseum
l-8-31,Nishinakano-machi,Toyama-shi,939-8084JAPAN
タカベに寄生するG/ossb/us属(甲殻綱;等脚目)の一新種
布村昇
富山市科学文化センター
〒939-8084富山市西中野町1−8−3瓦
伊豆諸島ならびに東京湾産のタカベLα〃α“g/“sαα電e""ve"”sに寄生していたG/““ob“
属のウオノエが採集されたが,本種は小笠原諸島沖産ヒメアカトビウオロの腔から知られてい
るGogasaware"sjsと最もよく類似するが,(1)腹尾節後縁が丸いこと,(2)体が小さく太いこ
と,(3)尾節の両肢が細いこと,(4)顎脚が狭いこと(5)第2触角の節がより多いことで相違す
る。また,本種は大西洋フロリダから知られているGルe耐"αhα"2ph〃Williams&Williams,1985
とも類似するが(1)体が短いこと,(2)目が大きいこと,(3)第1触角の節数が少ないこと,(4)
第2触角の節数が多いこと,(5)第2小顎の歯が少ないこと,(6)尾節の両肢が細いこと,(7)
胸節の基板が小さいことなどで区別される。
キーワード:G/“so6“,新種,ワラジムシ目,等脚目,ウオノエ科,魚類寄生,タカベ
Hitherto,8speciesofthegenusG/Cs”o6jzィshavebeenrepolted,butonlyonespeciesfTom
Japananditsneighboringseas,RecentlvsomespeclmenswerecollectedfTommouthofthecoetid
fish,Labγα“g/o”αα電e加岬e"〃心ThisspeciesismostcloselyalliedtoG/“”6畑sog“αw”e"sJs
Nunomural992,reported廿omthemouthofexocoetidflyingfish,Qpse/"ノWSα"gzイsrc印s,butthe
fbrmerlsseparatedけomthelatterinthefbllowingfeamres:(1)roundedandnarrowerpostenor
marginofpleotelson,(2)smallerandstouterbodvshape(3)naITowerramiofuropod,(4)
nalTowrermaxillipedand(5)moresegmentsofantennaThisspeciesisalsoallliedtoG
he脚〃αル脚phjrecoredfTomtheexocoetidfiShinFloridabutthefbnnerlsseparatedけomthelatter
inthefbllowingfeamres:(1)shorterbody,(2)biggereye,(3)moresegmentsofantennule,(4)
lessnumeroussegmentsofantenna,(5)lessnumerousteethonmaxilla,(6)slendererramiof
uropodand(7)weakereplmeraonpereonltes・
Keyword:G/o“o〃”,newspecles,parasiticlsopoda,Cymothoidae,Cymothoidea.
G〃”⑪6畑sa減加αe平〕.〃0W.
(Figs、1-2)
MJre"αノexα”"“:1早l(早h(ohlooltoytpveple9l69m6mriInmbiondbyoldevnlgetnh2)tahn)da1nケd(ladllotype,10.3mminbodylength),fTomthe
mouthhoofftthheeffiisshh,,LLaabb・・aaccooggノ/oo““αααα堰7e宮"e""vre""e""〃jjssPPeetteerrss((116644..00mmmmiinnbbooddyylleennggtthh,,mmaallee))ccaauugghhtt廿廿oommtthheesseeaaooffff
Ohshima,TokyoPrefecmre,June,4,1992,collTaekoArima:l早(l85mminbodylength)1ケ(58mminbody
length)fTomtheanotherindividualofthesamespecies,samedata,;l早(209mminbodylength)and1ケ(7.5mm、
*ContributionfromtheToyamaScienceMaseumNo、249
ワム
NobomNUNOMURA
bodylength)fTomtheanotherindividualofthesamespecies,samedata;Utone-shimaTokyoprefecmre,Sep29,1992
1早(22.2mminbodylength)and2mancas(4.4and4.9mminbodylength);Zenisu,Tokyoboy,June27,1992,1
3(9.5,皿ninbodylength)l早(20.2mminbodylength);Zenisu,TokyoBoy,June27,1992,1J(lLlmminbody
Fig.1.FemaleofG/“”6j"s”J脚aesp・nov・
AandB:Dorsalview.C:Lateralview.D:Ventralvlewofantenorpartofcephalon.
E:Antennule.F:Antenna.G:Mandible.H:Maxillula・ I:MaxillaJ:MaxillipedK〜Q:
Pereopodsl〜7.R:Uropod(A,D〜R:Holotype,BandC:paratype).BarfbrFig、1
A〜C、
3s
ANewSpeciesoftheGenusG/“sob畑s
length)l早(248mminbodylength).Holotype(TOYACr-12844),allotype(TOYACr‐12845)and9paratypes
(TOYACr-12846〜12854)aredepositedattheTovamaScienceMuseum
Descrや"o〃Q/た腕αノe・Bodv2、6timesaslongaswideCephalonalmostaslongaswide,ColordullyellowBodv
twistedslightly(FiglAandB).Eyesmediocreinsize,eacheyecomposedofaboutlOOommatidia、Antennule(Fig
lD)andcontlguousatbasalpartandcomposedof7segments・Antenna(FiglF)alittlelongerthanantennule,and
composedof8segments,Mandible(Fig.1G)palp,with3teeth;palpthree-segmentedtenninalsegmentwith2setae
atthetipMaxilluia(FiglH)slenderwith4teethatthetipMaxilla(Fig.11)widewith8〜l2recurvedsmall
spmes、Maxilliped(FiglJ)wideandpalp2-segmented;fIrstsegmentrectangular;tenninalsegmentsmallwithoutseta
inholotypebutwith2smallteethatthetipinanotherparatypespecimenPereopodsl〜7(FiglK−M)almostsimilar
inshape,butpereopods4〜71argerthantheperopodsl〜3:basisbigandalmostround;ischiumrectangular;merus
short;camusveryshort;propodusstout;dactylusrecurvedandreachesthemiddleareaofcalpus・Uropod(FiglR)白
basispentagonal,bothramilanceolate;sub-equalinlength.
D“crjp"o〃qf'"α/a・Remarkablysmallerthanfemale・Body21〜2.4timesaslongaswideandnotremarkably
遁 亙
J錘>,
トー一一計 ( ' j
L 一 一 一 I〜一一一一(cid:631)11
−−−−コ
ーシ
し一 − 〜 )
I
章
し い か 己
し 一一 一へ いゞ、‐’ JIl 一F 、。、‐
l ‐
邑 L
一 n亜 〆<−−、
浄 臣叩
唾 凹
L 1m、 「(cid:631)(cid:631)〜
〈 - 〜 r 、
齢
一−−−_
/
/ /‐
″
、 IF
Fig.2.MaleofG/“so〃"sα灯加aesp・nov、
AandB:Dorsalview.C:VentralviewofanteriorpaItofcephalon.D:Antennule・E
AntennaF:MandibleG:MaxillulaH:Maxillal〜O:Pereopodsl〜7.P:Penes.Q〜R
Uropod(A,C〜R:Allotype,B:paratype).BarfbrFig2A−B
31
NobomNUNOMURA
twisted(Fig.2A-B).Colordullyellow・Cephalo、0.46〜0.63timeaslongaswide・Eyesmediocreinsize,eacheye
composedofaboutlOOommatidiaAntennule(Fig2D)contlguousatbasalpartandcomposedof7segmentsAntenna
(Fig2E)alittlelongerthanantennule,andcomposedof8segments、Mandible(Fig2F)palpwith3teeth;palpthree‐
segmented・Terminalsegmentwith2setaeatthetip、
Maxillula(Fig2G)slenderwithastrongerand3teethatthetipMaxilla(Fig2G)widewithlO-l2recurved
smallspines・Pereopodsl〜7(Fig.21〜O)almostsimilarinshape,butpereopods4〜71argerthantheperopodsl-3:
basisbigandalmostround;ischiumrectangular;merussholt;carpusveIyshort;propodus;dactylusrecurvedand
reachesthemiddleareaofcamus,Penesstout(Fig2P).Uropod(FigQ〜R):basispentagonal,bothramlnarrow,
exopod3、7〜4.4timesaslongaswide,endopodalittlelongerthanexopod,3.9timesaslongaswide・
Re碗”肱.・ThepresentspeciesismostcloselvalliedtoG/o“o6j“09“αw”e"sjsNunomuea,1992,reportedfiom
themouthofexocoetidnyingfish,q\'se/"r"sα"9脚srceps,butthefbrmerlsseparated師mthelatterinthefbllowing
従amres:(1)roundedandna面owerposterlormarginofpleotelso、(2)smallerandstouterbodyshape,(3)、a汀ower
ramiofuropod(4)narrowermaxillipedThisspeciesisalsoalliedtoG、he〃"αル"1p力jWilliamsandWilliams,l985
recordedfTomtheexocoetidflshinFloridaButthefbnnerisseparatedhomthelatterinthefbllowingfbatures:(1)
shorterbody,(2)biggereye,(3)moresegmentsofantennule,(4)lessnumeroussegmentsofantenna,(5)lessnu‐
merousteethonmaxilla,(6)slendererramiofuropodand(7)weakerepimeraonpereonites.
Re娩rences
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10(11):1-32,pls・ll−5
Bowman,T、E、1978.NomenclaturalProblemsintheCymothoidIsopodGeneraC〃“oα,CO(わ"Op〃/"s,G/“”〃"s
α"JA化j"”"α・・theirSlutionbyApplyingtheLawofPriority・Cr"sraceα"α,34:217-219.
Bruce,NandT.E・Bowman,1989.SpeciesoftheParasiticlsopodGeneraCe7“方oaandG/“so〃"s(Crustacea:
Cymothoidae)廿omtheMouthsofFlyingFishesandHalfbeaks(Belonifbnnes).針""ルo"jα〃CO""め""o"sl‘o
ZboIogフノNo.489:1-28.
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offルeL加"eα〃Socje〃73(2):117-1990.
Kensley,B・andM・Schottel989・GuidetotheMarinelsopodCrustaceanofCarribbean.S胴"ルo"jα〃ノ"s/・P7e”
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35-45.
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Saophridae、1V・Cerathoinae.N“"γ""o"sk”ぬs灯拡Series3/13:281-378:pls,11-16.
Shiino,SMl9510ncymothoidisopodaparasiticonJapanesefishes.B"〃qfJtZpα"eseSocie〃Q5℃ie"r抗cFisherejes,
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耽皿SuppL2(3)Bd21-110・
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