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A new species of the genus Quelpartoniscus (Crustacea: Isopoda: Scyphacidae) from Toyama, central Japan

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(1)

A new species of the genus Quelpartoniscus

(Crustacea: Isopoda: Scyphacidae) from Toyama, central Japan

journal or

publication title

Bulletin of the Toyama Science Museum

number 28

page range 13‑16

year 2005‑03‑25

URL http://repo.tsm.toyama.toyama.jp/?action=repos itory̲uri&item̲id=827

(2)

富山市科学文化センター研究報告第28号,ppl3‑l6;(20 :

AnewSp iesofthegeImSQ"e〃 ""j (Crustacea:I poda:Scyphacidae

fmmToyama,CentralJapan

NoboruNunomura ToyamaScienceMuseum

l‑8‑31Nishinakano‑machi,Toyama 939‑8084JAPAN

富山県で発見されたウミベワラジムシの1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‑王

富 山 県 下 新 川 郡 朝 日 町 元 屋 敷 の 砂 利 海 岸 飛 沫 帯 か ら 発 見 さ れ た ウ ミ ベ ワ ラ ジ ム シ の 1種を新種Q"eゆα"o"/Sc"srQya脚αe" (和名:トヤマウミベワラジムシ:新称)とし

て記載した。本種は対馬から記録されているQ"eゆarro"なc"s s師",αe"s's

(Nunomura,1990)ともっとも類似するが,(1)体色が薄いこと,(2)目の個眼数が少 ないこと,(3)第1小顎外葉先端の歯の数が多いこと,(4)腹尾節後端の形がほぼ直角 であること,(5)雄第1腹肢内肢が太く,先端に小歯を持つこと,(6)雄第2腹肢内肢が 比較的短いこと,(7)第一触角最終節に多くの感覚毛を持つことなどによって区別さ れる。また,和歌山県白浜町番所崎から記録されているQ剛eゆα伽"/Sc"sse/。e"sIs Nunomura,20()3とは,(1)体色が赤みを帯びること,(2)頭部の前縁の両端が突出して いること,(3)目の個眼数が少ないこと,(4)第1小顎外葉先端の歯の数が多いこと,

(5)生殖突起が太く,先端の1部が分│岐していること,(6)第1触角最終節に多くの感覚

毛 を 持 つ こ と で 区 別 さ れ る 。 な お , 本 種 の ホ ロ タ イ プ は 富 山 市 科 学 文 化 セ ン タ ー

(TOYACr‑l3082)で保管される。

Keywords:Isopoda,Scyphacidae,Q"eわα"o"I "s,Newspecies,Taxonomy,Toyama

キ ー ワ ー ド : 等 脚 目 ウ ミ ベ ワ ラ ジ ム シ 科 , 新 種 , 分 類 学 , 富 山

InAugust,2003,duringasurveyontheshellfaunainthesupratidalofpebbleshore,Motoyashiki,Miyazaki,

l‑machi,EastempartofToyamaPrefecture,CentralJapan,IhappenedtofIndanunfamiliarterrestrialisopodcrus‐

ns、Asaresultofmyresearch,itprovedtorepresentanewspeciesofthegenusgz eわα"o"ISC"s、

Asahi‑machi taceans,As

Orderlsopoda

SuborderOniscideaLatreille 1803 FamiIyScyphacidaeDana,1852 Q"e〃 〃"zs Sm "me"卵s,n.sp.

(Toyama‑umibe‑warajimushi,new)

Fig1

Desc "o〃 脚αノe:Body(FiglA)long,25timesaswidcColorofsur色cepaleredinalcoholEyessmalL

eacheyecomposedoflOommatidiaCephalonwithlateralprQjectionlobeprotrudedPosterlormarginright‑angledand

*Contributions竹omtheTovamaScienceMuseum・No.31i

(3)

NoboruNunomul‑曇

F

︑︿

,

言・司冒・・.二二二一9A円

Queわaノfon/Scusfoyamaensノs,

DorsalviewぅB:Antennule;C:

MaxillipedうI−O:Pereopods]‑7;

nsP,

Antenna;D:Rightmandible;E:Lefimandible;F:MaxillulaぅG§MaxillaA P:PenesandpleopodlぅQ:Pleopod2;R:Uropod(All:Holotypemale).

(4)

1ノVewや / Qゾ/ルege"M9Quelpartomscus

rounded・

Antennule(FiglB):tenninalsegmentwith7aesthetascsatthetip・Antenna(FiglC),reachingtheposterlor endofpereonite2;flagellumconslstsof3segments:mutuallengthof3flagellarsegmentsisabout2:l:lラtenninalone

withalonEsetaatthetip、

Rightmandible(Fig」D):parsincisiva2‑toothed;laciniamobilisnotcitinizedand4‑toothedラ3hairvbristles言 processusmolarisrepresentedbvamfioflongsetae・Lefimandible(F唱lE):parsincisiva3‑toothed;laciniamobili言 2‑chitinized;3hairvbristlesぅprocessusmolarisrepresentedbvatuftoflongsetae・Maxillula(F堰1F):innerlobewith 2plumosesetaeラouterlobewithl2teethatthetip,twoofthemsender,Maxilla(Fig.1G)ratherslender,withmanv finesetae,Maxilliped(FiglH):palpwithonlydistinctbasalsutureline,othersegmentsarerecognizedonlyon1nner

margln,eachwithmanvsetaeonbothmargms;enditerowandtriangular、

Pereopodl(Figll):basis20timesaslon2aswide,with2‑3shortsetaeonmnermargin;ischium3/5aslong asbasis,with3setaeonmnermarginandasetaeonoutermargln;menls3/4aslongasischium,with7−9setaeon mnermarginandasetaonoutermarglnぅcamusaslongasmerus,andalittlestouterthanmerus,with7setaeinclud‑

ing2distalbifIdonesandaErouDofshortsetaeonlnnerdistalarea;propodusaslongascalpusbutslender,with 8setaeincluding2distalb而dones,and6setaeonoutermargin;dactyluswithamfioflongsetaeandagroupo且

finesetae・

Pereopod2(FiglJ):basis23timesaslongaswide,with4shortsetaeonmnermargin;ischium2/3aslong

asbasis,with3setaeonmnermarginandasetaonoutermargin;merus4/5aslongasischium,with5setaeonlnner

marginandasetanearouterdistalangle;calpusaboutaslongasmerus,with91ongsetaeonlnnel・marginandaseta onoutermargln;propodus;dactyluswithamftoflongsetaeandagroupoffmesetae・

Pereopod3(FiglK):basis25timesaslongaswide,with9‑lOshortsetaeonmnermarginandasetaonouter margin;ischium4/5asbasis,with5setaeincludingabifldoneonlnnermarglnandasetaonoutermarg1,;merus

0.7timesaslongasischium,with5‑6setaeon1nnermarginandasetaonoutermargln;calPus1.3timesaslong asmerus,with7‑8relativelvlongsetaeon1nnermarg1n;propodusabout85%aslongascarpus,with2setaeon1nner

marginand6setaeonoutermarginぅdactyluswithatufioflongsetaeandagroupoffmesetae・

Pereopod4(FiglL):basis3.0timesaslongaswideうischiumabout55%aslongasbasis,with4‑5setaeon

mnermarglnぅmerus4/5aslongasischium,with5−6setaeonlnnermarglnandasetaatouterdistalangleうcarpus

1.3timesaslongasmerus,with5setaeon1nnermarginラpl・opodusaslongasmerus,with4setaeonlnnermarg1n

and2−3setaeonoutermargin;dactyluswithatuRoflongsetaeandagroupoffmesetae,

Pereopod5(FiglM):basis29timesaslongaswide,with4‑5shortsetaeonbothmargins;ischium3/5aslong asbasis,with2setaeonmnermarglnぅmerus4/5aslongasischium,with4setaeonlnnermarglnand‑1‑2setae

onoutermarglnぅcarpus1.2timesaslongasmerus,with6relativelylongsetaeonmnermargln;propodusaslong ascalpus,with4setaeonlnnermarglnand8setaeonoutermargin;dactyluswithamffoflongsetaeandagroup

offinesetae、

Pereopod6(F唱1N):basis24timesaslongaswide;ischium3/4aslongasbasis,with7setaeonlnnermar‐

ginand2setaeonoutermargln;merus0.7timesaslongasischium,with4setaeonmnermargm,with2setaeon outermarglncamusalittlelongerthanmeruswith5setaeonlnnermarglnpropodusaslongascalpuswith4setae

onlnnermarginand9‑llsetaeonoutermarginうdactvluswithamfioflongsetaeandagroupoffinesetae・

Pereopod7(FiglO):basis27timesaslongaswide,with,9−lOsetaeonlnnermarginand2‑3setaeonouter ma屯inラischium3/4aslongasbasis,with3‑4relativelylongerandsomeshortersetaeon1nnermarginand2‑3setae onoutermargln;merus3/4aslongasischium,withlO‑l2setaeonlnnermarglnand3setaeonouterdistalanglej calpusalittleshorterthanmemswith3setaeonInnermarglnpropodusalittleshorterthanpropoduswith4setae

onlnnermarginandll‑l2setaeonoutermargin;dactvluswithamfioflongsetaeandagroupoffinesetae・

Penes(FiglP)stoutandrounded,distalareacleft

Pleopodl(FiglP):endopodstout,with8denticlesonlnnerdistalarea:exopodtrapeozoidal

Pleopod2(FiglQ):endopodstraight;exopodroundedtriangul

(5)

N()b()ruNunoI11ul

Uropod(FiglR):basispentagonalうendopodnarrow,withatufiofsetaeatthetip§exopodL2timeslollgerand

alittlenarrowerthanendopod,withatufiofsetaeatthetip・

Fe版α/e:Roughlysimilartomaleexceptfbrcopulatoryapparams・

Mt"e"α/exα""" ラ2c73(l3holotype,6.8mminbodylengthandlc7paratype60mminbodylengthand

3 早 早 ( l 早 a l l o t y p e , 5 . 6 m m i n b o d y l e n g t h a n d 2 早 早 p a r a t y p e s , 5 . 9 − 6 5 m m i n b o d y l e n g t h ) , M o t o y a s h i k i , M i y a z a k i ,

Asahi‑machi,ToyamaPref,Aug16,2003,collNoboruNunomura;2早早paratypes34‑5、Omminbodylength),

Motoyashiki,Miyazaki,Asahi‑machi,ToyamaPref,Au9.1,2004,COⅡ、NoboruNunomura・Typeseriesisdepositedas fbllows:Holotype(TOYACr‑l3082),allotype(TOYACr‑l3083)and3paratypes(TOYACr‑l3084〜13086)atthe ToyamaScienceMuseum;2paratypes(NSMTCr‑l6237)attheNationalScienceMuseum,Tokyo,

Etymology:ToyamalsanameofPrefbcture,wherethetypeserleswascollected・

Re耐α戒s:Asfaraslamaware,fburspecieshavebeenrecordasvalid・Thepresentnewspeciesismostclosely

alliedtog"eゆαr/o"! "s sルノ"'αe" (Nunomura,1990)known廿omTsushima,butthefbnnerlsseparated廿omthe latterinthefbllowingfeatures:1palercolorpattem,2lessnumerousommatidiaofeyes,3numerousteethonthe

outerlobeofmaxillula,(4)almostri2ht‑an21edposterlorpartj:蕊

outerlobeofmaxillula,(4)almostright‑angledposterlorpart

ofpleotelson5stouterendopodofmalefIrstpleopod,bear

ingdenticles,(6)relativelvshorterendopodofmalesecond pleopodand(7)numerousaesthetascsonthelastsegmenta

antennule・ThepresentnewspeciesisalsoalliedtoO,

seroe"sjsNunomura,2003reported廿omShirahama、

Wakayama,butdi鮭rs廿omitinthefbllowingfeatures:(正 darkerbodycolor,(2)prQjectionofprotuberancesontheboth sidesofanterlorofmarginofcephalon,(3)lessnumerous ommatidiaofeyes,(4)numerousteethontheouterlobeoi maxillula,(5)stouterpeneswithaclefiofposterlorareaand

(6)numerousaesthetascsonthelastsegmentofantennule Fig.2Samplingslteofthepresentnewspecles

Re従rences

Kwon,DH,1995.Terrestriallsopoda(Crustacea)6omCh可ulslandKoreaKり"eα〃JZbo/・ll:509‑538.

N u n o m u r a , N 、 , 1 9 8 6 . S t u d i e s o n t h e T e r r e s t r i a l l s o p o d C r u s t a c e a n s i n J a p a n 、 1 1 1 . T a x o n o m y o f t h e F a m i l i e s S c y p h a c i d a e

continued,MarmoniscidaeHalophilosciidaePhilosciidaeandOniscidae.B""7byααSiMis9:l72

Nunomura,N.,199().SmdiesontheTe汀estriallsopodCrustaceansinJapa、,V、Taxonomyofthefamiliesof

Annadjllidiidae,ArmadiidaeandTylidae,withtaxonomicSupplementstosomeotherFamilies.β"".Tbyα"1aSci

M"s,13:1‑58.

N u n o m u r a , N 、 , 2 0 0 3 . F o u r n e w t e r r e s t r i a l i s o p o d c n l s t a c e a n s f i ・ o m K a s h i m a l s l e t a n d i t s n e i g h b o r i n g , T a n a b e B a v . β " ノ / 、

7byα"7aSaM"&28:13‑24

参照

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