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
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)
Fig.1.
Desc "o〃 脚αノe:Body(FiglA)long,25timesaswidcColorofsur色cepaleredinalcoholEyessmalL
eacheyecomposedoflOommatidiaCephalonwithlateralprQjectionlobeprotrudedPosterlormarginright‑angledand
*Contributions竹omtheTovamaScienceMuseum・No.31i
プ
NoboruNunomul‑曇
瀞
路
一
〆
誓
F
︑︿
,多努〃
言・司冒・・.二二二一9A円F
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).
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,with2setaeon1nnermarginand6setaeonoutermargin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,with4setaeonlnnermarg1nand2−3setaeonoutermargin;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 outermargln;camusalittlelongerthanmerus,with5setaeonlnnermarglnぅpropodusaslongascalpus,with4setae
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 calpusalittleshorterthanmems,with3setaeonInnermarglnラpropodusalittleshorterthanpropodus,with4setae
onlnnermarginandll‑l2setaeonoutermargin;dactvluswithamfioflongsetaeandagroupoffinesetae・
Penes(FiglP)stoutandrounded,distalareacleft
Pleopodl(FiglP):endopodstout,with8denticlesonlnnerdistalarea:exopodtrapeozoidal
Pleopod2(FiglQ):endopodstraight;exopodroundedtriangul
N()b()ruNunoI11ul‑愚
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:(1)palercolorpattem,(2)lessnumerousommatidiaofeyes,(3)numerousteethontheouterlobeofmaxillula,(4)almostri2ht‑an21edposterlorpartj:蕊
outerlobeofmaxillula,(4)almostright‑angledposterlorpart
ofpleotelson,(5)stouterendopodofmalefIrstpleopod,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,Marmoniscidae,Halophilosciidae,PhilosciidaeandOniscidae.B""、7byα碗αS℃iMiイs,9:l‑72
Nunomura,N.,199().SmdiesontheTe汀estriallsopodCrustaceansinJapa、,V、Taxonomyofthefamiliesof
Annadjllidiidae,ArmadiⅡidaeandTylidae,withtaxonomicSupplementstosomeotherFamilies.β"".Tbyα"1aSciM"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