A new species of the genus Papulphiloscia (Crustacea: Isopoda: Phiosciidae) from Minami Daito Island, southern Japan

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A new species of the genus Papulphiloscia

(Crustacea: Isopoda: Phiosciidae) from Minami Daito Island, southern Japan

journal or

publication title

Bulletin of the Toyama Science Museum

number 26

page range 1‑4

year 2003‑03‑25

URL http://repo.tsm.toyama.toyama.jp/?action=repos

itory̲uri&item̲id=800

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富山市科学文化センター研究報告第26号，pp､1‑4；（2003》

ANewspeciesofthegenusPapulphiloScia（Cmstacea:Isopoda:Phi ciidae》

fromMinamiDaitoIsland，SoutheI｡、Japan夫

NoboruNunomura TovamaScienceMuseum

l‑8‑31，Nishinakano‑machi，Toyama，939‑8084,JAPAN 南大東島から発見されたミナミワラジムシの 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‑韮

沖縄県南大東島の星野洞で発見されたミナミワラジムシ属の一種を新種 P " h"oscjα "Ce" （和名：ダイトウミナミワラジムシ(新種)）として記載した。

本新種は南西諸島沖永良部島から知られているP. "/α"αともっとも類似するが，（1）

オスの第1腹肢内肢に多数の1列の小さい刺があること，（2）第2触角がより長いこと，

(3)第4胸節背部の感覚剛毛の位置が側縁から比較的近いこと，（4）頭部前縁の中央部に明瞭な隆起が無いことにより区別される。模式標本は富山市科学文化センターで保管される。

キーワード：ミナミワラジムシ，等脚目，南大東島，新種，

Keywords：newspecies，Papuaphiloscia，Isopoda，Okinawa，Daitolsland

Duringacave‑surveyatHoshino‑do(Hoshino‑ana)，Mr､YLﾘilnagakihappenedtocollectthreeindividualsof蕊 sciidisopod，togetherwithterrestrialamphipods・TheyweresenttoProfMorino，IbarakiUniversitybythecour‐

philosciidisopod，togetherwithterrestrialamphipods・TheyweresenttoProfMormo，lbaraklUmversltybythecour‐

tesyofMr･TadashiYamanouchi，andonlyisopodspeclmensweresenttomefbrmystudybythecourtesyofProf Morino・Atthecloserexaminationsofmine，theyprovedtorepresentanewspeclesofthegenusP " 〃"o jα、

BefbregoingfUrther，IwishtoexpressmysmceregratitudetoProfHiroshiMorinoofthelbarakiUniversity，Mr YUjilnagakiandM工TadashiYamanouchifbrtheirkindnessingivingmeachancetoexamlneanmterestlngmaterials

FamilyPhilosciidae Papuap〃/oSc/ada"oens/ssp･nov.，

（Daito‑minami‑warajimushi，new）

（Figsland2）

Mme"α/exa加加eJ：233(l3holotype,42mminbodylength,andlc7paratype,45mminbodylength,TOYA Cr‑l2921）andl早(allotype31mminbodylength),Hoshino‑do,noIthwestpartofMinamiDaitolsland,OkinawaPref Aprl2,1999,YUjilnagaki､Holotype（TOYACr‑l2920)，allotype（TOYACr‑l2921）aredepositedattheToyamaSci enceMuseumandaparatype（OMNHAr‑5868）attheOsakaMuseumofNamralHistory．

D c'や"o〃呼加α/e:Body29timesaslongaswide,ColorwhiteEyeslackingCephalonroundedPosteriormar‐

ginofpleotelsonroundedpostero‑medialarea･NodulilateralisonpereonalsomltesaresituatedalmostnearareafTom eachlateralmargin（Fig.2)．Pleonalsomitesabruptlynarrowerthanpereonalsomites．

＊ContributionsfromtheToyamaScienceMuseulⅡn，No.278

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N o b o m N U N O M U R A

Antennule(FiglB)：航standseCondsegmentssquare,thelatterwith3aesthetascsラthirdsegmentrectangular,with 2aesthetascsatitstipAntenna（FiglC)，reachingpereonalsomite2andcomposedof3peduncularsegmentsand3 flagellarsegments；mumallengthof3nagellarsegmentsbeing2:l:1．Rightmandible：parsincisiva3‑toothed；Iacinia mobilisthinand3‑toothed；ahairyseta;processusmolarisrepresentedbvasinglemftofsetaLeftmandible（FiglD〉

:parsincisiva4‑toothed；laciniamobilis4‑toothed，withahailysetaラprocessusmolarisrepresentedbysingleseta Maxillula（FiglE）：innerlobewith2plumosesetae;outerlobewith8simpleandrelativelylongteethattip､Maxilla (FiglF）withrelativelynarrowdentalareaMaxilliped(Fig｣G）：enditerectangular,withabiggerand2smallerspurs onouterdistalareaぅpalpnarrow・

Pereopodl(Fig.1H）：basis3.Otimesaslongaswide,with2rowsofshortsetaeonventralmargin；ischium halfaslongasbasis，with3−4setaeonlnnermarglnandasetaonoutermargln；merusaslongasischium，with4 setaeonlnnermarginandasetaattheouter‑distalangle；carpus1.6timesaslongascarpus，with61ongsetaeon lnnermarglnandmanyfmesetaeonlateraldistalarea；propodusaslongascarpus，with41ongerand7‑8shortersetae onlnnermargin；dactylusbifid．

F

H

A

、、

、

一一ジラ1

1 m m

︑︑−是

〆グンョ

マ

』

／

一莞

Ⅲ N

Fig.1P "叩〃" cjα "Ce" " s'nsp．

A，Dorsalview；B，antennule；C，antennaうり，rightmandibleうE，maxillulaラF，maxillaぅG，maxilliped；H，pereopodl；

I,pereopod3iJ，pereopod5うK,pereopod7ラL,penesandpleopodl；M,pereopod2；N，uropod（All：holotypemale）

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ANewspeclesofthegenusPapulphiloscia廿omMinamiDaitolsland

Pereopods2‑6(Figs､11andJ）similar：basis2．5‐34timesaslongaswide,with2‑5shortsetaeonmnermargln号 ischiumO､6timesaslongasbasis，with2−5setaeonmnermargmandseveralshortsetaeonoutermargln；merusO､5‐

0.7timesaslongasischium，with5setaeonlnnermarglnand2setaeonoutermargmonoutermargln；carpus1.5‑

1.8timesaslongasmerus，with6setaeonmnermarglnうpropodusalittlelongerthancarpus，with7setaeonlnner marglnand5−6setaeonoutermargin；dactylusbifld、

Pereopod7（FiglK）：basis32timesaslongaswide,withasetaatlnnerdistalangleand4‑5shortsetaeon lnnermargin；ischiumhalfaslongasbasis，with3−4setaeonlnnermarglnand3setaeonoutermargln；merus0．8 tlmesaslongasischium，with4−6setaeonlnnermarglnand2setaeondistalmargln；camus1.5timesaslongas merus，with4setaeonlnnermarglnandmanyshortsetaeonoutermargln；propodusO､8timesaslongascarpusゴ with6−7setaeonmnermarginand4shortsetaeonoutermargin；dactylusbiHd，

Penes(FiglL)relativelynarrow,Pleopodl(FiglL):endopodstraight,apicalareabendingoutwards,bearingaserles ofmorethan40spinules;exopodsemi‑circular・Pleopod2(FiglM):endopodstraightandrathershort；exopodunequally

ovate・

Uropod（FiglN)：basispentagonal，L6timesaslongaswide；endopod1.7timesaslongasbasis,with21ong setaeattlpandmanyfInesetaeonlateralborders；exopodO､7timesaslongasbasis，with2−4setaeonbothmargma

彫加α/e：Roughlysametomaleexceptfbrcopulatoryapparams．

E〃脚o/o副ﾉ．Thepresentnewspeciesisnamedaherthetypelocality，Daitolslands．

D加刀""o"・Typelocality・

Re脚 k3．ThepresentnewspeciesismostcloselyalliedtoP " ﾙ" cjα加s"/α"α，廿omOkinoerabulsland，

Amamilslands(Vandel,1970).Thefbnneris,however,separated加、thelatterbythefbllowingfeamres:（1）presence ofarowofsmalldenticlesalongtheendopodofmalefIrstpleopod,（2）longerantenna,（3）remoterpositionofnoduli lateralisonthe4thpereonalsomlte，and（4）absenceofantero‑medialprocessonthecepahlonThespeciesisalso

９８７６５４３２１０

■■■■■■■■■

０００００００００

ゞＣＣノノノノー︒︐ｂ一一

Ⅱ Ⅲ Ⅳ V Ⅵ Ⅶ

Fig.2Pじゆ" ﾙ"o jα "Ce"sJsn･sp

PositionsofNodulilateralis

、

、ぺ

. 、／、／、／

− − ﾆｰﾏｰﾌ／ノ〈

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NoboruNUNOMURA

alliedtoP"〃ﾙ"ojαα必areocorded廿omthelmpereialPalace,Tokyo(Nunomura,2000）Butthefbnneris,how‐

ever,separatedftomthelatterbythefbllowingfbatures:(1),presenceofaseriesofnumerousspi､ulesonendopodof malefIrstpleopo｡,(2)longerantenna,（3）nearerlocationofnodulilateralisondorsalsurfaceofpereoanalsomite4and (4)absenceofmiddleprotuberanceonanterlormarginofcephalon

FamiliesScyphacidae M"s, 9:1‑72．

thetaxonomy‑3．B""．

References

Nunomura，N,，1986．SmdiesontheterrestrialisopodcrustaceansinJapan､111．TaxonomyoftheFam

（continued，Marinoniscidae,Halophilosciidae，PhilosciidaeandOniscidaeB""、7byα碗aSaM"s‑ Nunomura，N,，1992．SmdiesontheTerrestriallsopodCIustaceansinJapan，V11.Supple‑mentstothet

7byα耐aScj、M2ｨs,，15:1‑23．

Nunomura，N､，2000．TerrestriallsopodandAmphipodCmstaceans廿omthelmperialPalace，Tokvo．

〃"S・乃勿o,35：79‑97．

Nunomura,N､，2001APhilosciididopod（Cmstacea）collectedmmBoninlslandB""・Zn〕ﾉαmas Vande1，A，1970．LeslsopodesTerrestresetCavemicolesdel'ArchipelNippon（secondMemoires）

Mi ＆Tb勺o，13(3):373‑382

Vandel,A，1973．LesisopodesTerresters（Oniscidea)delaMelanesie､Zbo/・ﾘﾉeγ〃α､125：3‑160.

A化"?．ⅣとJ胸．Sa

M"s、24:25‑28.

B""．〃α腕．此『