富山市科学博物館研究報告第32号，pp95‑98；（20()9）

Red criptionofSα 〃αe"r〃"0〃fromNoI･th‑eaStRussia率
NoboruNunomura

ToyamaScienceMuseum

l‑8‑31Nishinakano‑machi，Toyama939‑8084，Japan

北東ロシアの陸水域で採れたヘラムシ（甲殻綱：等脚目）S ""α碗o,，

布村昇
富山市科学博物館
939‑8084富山県富山市西中野町1‑8‑3：

2004年7月25日から同年8月12日まで，ロシア・チュコト共和国・アナデイール(Anadyr）で実施された科研費基盤研究（海外B）（平成15‑17年度）「極東アジアにおける淡水魚類の生物多様性とその起源」（代表：後藤晃・北海道大学）アナディール

付近のカンチャラン川において，富山大学の山崎裕治博士が採集した等脚類，
sα 'me戒o"'o〃を再記載する。本標本はメスl個体であったが，日本では入手しにくい標本であり，付属肢の形態を記載した。本標本は富山市科学博物館で保管される(TOYACr‑l4893）

キーワード：等脚目，ヤリボヘラムシ科震，オオヤリボヘラムシ，再記載

Keywords：Isopoda，Chaetiliidae，Sα碗〃jae"/o" "，redescription

DuringthesurveyentitledBiodiversltyandOrigmofFreshwaterFishesinFarEastemAsiaNo．15405008,Dr・
YUjiYamazakihappenedtocollectalargelsopodindividual廿omthegrasscommunltyof廿eshwaterenvlronment唾
ofRiverKanchalan，nearAnadyr，Russia・Thespeclmenwaslatersenttomefbridentiflcationandmysmdy，Asthere

sultofmvexamination，1tprovedtobeafemaleofSa成"iqe"わ"zo"，Iexaminedalltheappendagesofthespeclmen
Befbregoingfnrther,IwouldlikeexpressmyslnceregratimdetoYUjiYamazaki，PhD，ToyamaUniversityfb:
hiskindnessingivingmeachancetotheimportantspeclmen．

S"zO〃（Linnaeus，1767）（Japanesename：Oo‑
Varibo‑heramushi，new）
O"jsc"se戒O脚o〃Linnaeus，1767，p・ 060．

Sq"j"αe"rO脚o〃DeGeer，1778，p、514，p1．32，fIgsl−10．
4se""SE"rO脚o"，Olivier，1789，p、253．

〃b/e"rO脚o"，Bosc，1802,p、178.‑‐Latreille，1803‑4,p，361，p1．58，flgs、2‑3.‑‑MilneEdwards，1840,p、128
Sα 〃αe師omo"，Adams，inWhite，1852，p207．
G卯/o"o e"/o'"o",Miers，1883,P12，pll，figs，1‑2‑‐Richardson，1899,p843−‐Richardson，1899,p262
Mesidoteaentomon，Richardson，1905，p348，fig，374‑376.‑‑Richal･dson，1909，p，107.‑‐Kussakin，l979b，p、125(OkhotskSea，0‑110mdeep).‑‐Kussakin，1982,p74，Hgs、4Sα "αe"rO脚o〃（Linnaeus，1758）＊ContributionshomtheToyamaScienceMuseum，No.364

９Nob()1.uNunoⅡur患

Mbre"α/exa腕j"eJ：l早（243mminbodylength,riverKanchalannearAnadyr,RussiaMay5th,August,2004
Collectedtogetherwithpurefreshw
atercottidfishes・
CollYUjiYamazaki・Thespeclmenw
illbedepositedatthe
ToyamaScienceMuseum（TOYACr‑l4893）
Dc
""o"
.
･
Bodv
2､
6ti
mesaslongasw
ide,Colorblackish,w
ithpaleirregularpattemsondorsalsur
facebutdu
liyellowonv
entralsur
faceandappendages・Dorsolate
rally
Hatt
en
ed，
Int
egu
ment
s
mooth・
Cephalon：
Ocu
lar
lobe
s
not
P
ro‑jecting
ante
r
ior
lv
・
Ev
eslocate
dondorsalsur色Ce,
eacheyecomposedofabout
35ommatidiaPereonites2‑
6w
ithw
el：
dev
elo
pedepi
mera，
Per
eonit
e
7andp
leonitesnaITow
erthanper
eonalsomites，
Pleon
itesl
‑
4distinct・
Antennule（FigB)：peduncularcomposedof3segments；Hagellumsinglesegmented，withaboutlOgroupsof
shortaesthetascsondistalhalfoflateralmarginAntenna（FigC）composedof5peduncularand8‑9Hagellarseg‐
ments,
Right
mandible（Fig.
D)：
parsincisiv
a5‑
headed；laciniamobi
lisnotchitinzedand3‑
headed；lO
hairs；
processus
molariswide,withmorethan27setaeLeftmandible（FigE)；parsincisiva4‑headedﾗwithlaciniamobilischitinizedand3‑headed；l2hairs；processusmolariswide，withmorethan25setaeMaxillula：innerlobe（FigF）with3plumosesetaeandasmalltooth;outerlobe（FigG）withteethatthetipMaxilla（FigH）innerlobewithplumose
setaeand23‑24setaeラeachramusofouterlobewith6−7setaeonthedistalmarginMaxilliped（Figl)；enditesmali
withacouplinghookonlateralmargmandl2‑l3setaeonapicalarea、Mandibularpalp5‑segmented；segment3big‐gest，withprotrudedinnerarea，
21ongsetaeatouterdistalar
eaan
dman
ysetaeonbothmarg
lnsぅsegment4s
lender・
withmanysetaeonbothmarglns；tenninalsegmentsemi‑circular，with6strongerandseveralweakersetaearoundthe
margln，Pereopodl（FigJ)：basisrectangular,35timesaslongaswide,with4‑5setaeatlnnerdistalangleand5rela‐
tivelylongsetaeonoutermarginラischiumrectangular，abouthalfthelengthofbasis，with6−7setaeonlnnermargm
and2setaeonoutermarg1n；merus0.3timesaslongasbasis，with7‑8setaeonlnnermargmand7‑8setaeonouterdistalarea；carpus2/3aslongasmerus，withllsetaeonlnnermarglnand3setaeonouterdistalareaうpropodus3､7tlmeslongerthancarpus，withmorethan20setaeonlnnermarg1nand8‑lOsetaeonoutermargm・
Pereopod2（FigK)：basis3．2timesaslongaswide，Q6timaesaslongasofbasis；merusl/3aslongas
ischium，with5−7setaeonoutermargm；carpusalittleshorterthanmerus，with9‑lOsetaeonmnermargln；propodus
3/4aslongasbasis，alittlenarrowerthanthatofpereopodl，withabout30setaeonlnnermargin；dactylus3/4as
longaspropodus・Pereopod3（FigL)：basisandischiummissingﾗmenlsshort,withlO‑l2setaeonoutermargln;calpuswithl5‑l7setaeon1nnermargln；propoduswithabout20setaeonlnnermargln・

Pereopod4（FigM)：basis3.ltimesaslongaswide,withmorethan24setaeonoutermargin；ischiumO6
t1mesaslongasbasis，with7−8setaeonmnermarginand6−7setaeonouterdistalmargm；merus0.4timesaslong
asbasis，withlOlongsetaeonoutermargm；carpusalittleshorterandnarrowerthanmerus，with4setaeonoutermar‑gln；propodus1．2timeslongerthancalpus，with6setaeonlnnermargin；dactylusO,6timesaslongaspropodus、Pereopod5（FigN)：basis27timesaslongaswide，with2‑3setaeatlnnerdistalangleand33‑35setaeon
outermargin；ischium3/4aslongasbasis，with5−6inne1･distalareaandl4‑l5setaeonoutermargm；merus5/9aslongasischium，withl7setaeonlnnermarglnラcarpusaslongasmerus，withl6setaeonlnnermargmand51onger
andseveralshortersetaeonoutermargln；propodus1．3timeslongerthancarpus，with5setaeand2spineson1nner
marglnand8seteaonoutermarginうdactylus5/7aslongaspropodus・
Per
eo
po
d6unf
brtu
n
at
e
lyl
ack
i
ng，

Pereopod7（FigO)：basisrectangular，a4timesaslongaswide,withl2setaeonlnnermargln,severalshortsetaeondistalhalfofinnermarg1nand5‑lOplumosesetaeonoutel･margin；ischiumrectangular，0．55timesaslong
asbasis，withlOlongsetaeonoutermarglnうmeruswith3−4seteaonmnermarglnand8−91ongsetaeonoutermar‑
gln；carpus1．2timeslongerthanmerus，withl2−l3setaeonmnermargmandll−l6setaeondistalareaofoutermar‐
gln；propodusaslongascarpus；dactylus3/4aslongascalpus、

Pleopodl（FigP)：bothramlrectangular，3．5timeaslongaswide

Pleopod2（FigQ)ラbasisr
ectangular
ラendopodtr
iangular;endopodellipsoid,withmorethan50setaearoundthe9患

RedescriptionofS 加丁αe剛oﾉ"o〃fi･omNorth‑eastRussia

Fig.S ""αe" 腕0〃（Linnaeus，1767）
A：Dorsalview；B：Antennule；C：Antenna；D：Rightmandible；ELeftmandible；F：Innerlobeofmaxillula；G
Outerlobeofthesame；H：MaxillaぅI：Maxilliped；J−N：Pereopodsl‑5ぅO：Pereopod7；P−T：Pleopodsl‑S；U：Uropod（All：Afemale)．

margln･

Pleopoq 3（FigR)：endopodtriangular；endopodwithsetaearoundthemargl、Pleopod 4（FigS）andpleopod5（Fig．T)：endopodelongatedlanceolate；exopodalittlelongerthanendopod

FigU)：46timesaslongaswideandtaperlngtowardsthetipぅpeduncleoccupying82％inlength；
Uropod (97NoboruNunoH1u1．塁

exopodtriangulaI.；endopodtriangularandO､4timesaslongasexopod
Re従rences

Gruner，HEl965‑66、KrebstiereoderCrustaceaV,Isopoda、DieTierweltDeutschlandundderangrenzendedn
Meersteile・GustavFischer・Jena，

Guljanova,El936・Ravnonogiedalnevostochnykhmorei""αSSISR,Ra加o6"αz"ye,7(3)：1‑279（inRussian)．
Kussakin，0．G．1982．MarineandbrackishlsopodaofcoldandtemperatewatersofthenorthemhemisphereⅡ，sub‐orderValvilもra,Anthuridea,etc・AC S UaS､凡Le"加g' 1‑462（inRussian)．
Richardson，H、1905．AmonographontheisopodsofNorthAmerica．β""α加US．M"．．〃"8．，54：I−LⅡI＋1‑727.

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