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A new species of the genus Lucasioides (Crustacea: Isopoda) from nest material of Mogera imaizumii, Toyama-ken, central Japan

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(1)

A new species of the genus Lucasioides

(Crustacea: Isopoda) from nest material of Mogera imaizumii, Toyama‑ken, central Japan

journal or

publication title

Bulletin of the Toyama Science Museum

number 33

page range 33‑37

year 2010‑03‑15

URL http://repo.tsm.toyama.toyama.jp/?action=repos itory̲uri&item̲id=922

(2)

富山市科学博物館研究報告第33号,pp,33‑37;(2010》

ANewSpeciesoftheGenusL"c m〃e$(Crustacea:Isopoda)fmm neStmaterialofM'g α"αjZ""f",Toyama‑ken,centralJapan*

NoboruNunomura ToyamaScienceMuseum

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

富山県のアズマモグラの巣材から発見された ハヤシワラジムシの1新種

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:

横畑泰志氏が富山県東部魚津市三ヶの魚津市ミラージュランドのアズマモグラの巣 材から採取した陸産等脚目を新種L"casjoj昨syokoh" (和名:ヨコハタモグラワラ ジムシ:新称)として記載した。本種は富山県西部のモグラの巣から記録されている L"cas/oj火srQyα"'αe"sjsNunomura,2008と類似するが、(1)第1腹肢外肢の先端付近 に剛毛があること、(2)頭部前面観で上方が低い三角形であること、(3)第3胸節の 剛毛も側縁から遠くにあること、(4)第6胸肢座節に多数の長い剛毛があること、(5)

雄の第2腹肢外肢の内縁に剛毛が無く、外縁に剛毛があることなどによって区別され

る。

等脚類、新種、富山、モグラ、巣材分類学、ヨコハタモグラワラジムシ Isopod,newspecles,nestmaterialofMbgα,taxonomy,

L"c joj昨syokoル α』

キーワーIド Keywords

Hitherto,llspeciesofthegenusL"cjoj昨shavebeenrecorded廿omaⅡovertheworldasvalid,(Schmalfilss, 2003),7speciesfromJapan(Nunomura,1987,1991,1992,2000,2003,2008,2009)andtwospecieshavealreadyre‐ corded廿omthenestmaterialofMフgeノ"αinthewestempartofTovamaPrefecture(Nunomura,2008).

Recently,Dr・YasuharuYokohataoftheToyamaUniversitycarriedoutanecologicalsurvevonatⅧMirage‑land鵬 Uozu‑shi,Toyama,HecollectedseveralspeclmensoftelTestrialisopodcrustaceansandsenttome・Atthecloserexaml‑ natlonofmine,theyareprovedtorepresentanewspeciesofthegenusL"cjoj火sandldescribeditasL"cjoj火s )'0幼ル" TheholotypeisdepositedatTovamaScienceMuseum(TOYACr‑l9939).

Befbregoingfilrther,IwouldliketoexpressmysmceregratitudetoDr,YasuhamYokohata,Universityof Toyamafbrhiskindnessingivingmeachancetoexamlnesuchinterestlngmaterials.

Orderlsopoda

SuborderOniscidea

FamilyAgnaridae L"caSj たSJC""α in・sP.

(Japanesename;Yokohata‑mogura‑warajimushi,newノ

(Figs,1−2)

*Contributions廿omtheToyamaScienceMuseum,No38i

QJ

(3)

NobonlNunomura

Mbre α/exa加加 533(lJholotype,6.Omminbodylengthand433paretypes,4.1〜5.3mminbody length)and7早早(1早allotype,6.3mminbodylength,6早早and3.5〜62mminbodylength)廿omnestmateriai ofamole,Mbgαj脚ajz"胴",Sanga,Uozu‑shi,Toyamaken,0ct、2009coll・YasushiYokohata・Typeseriesisdeposited asfbllows:holotype(TOYACr‑l9939),allotype(TOYACr‑l9940)and3paratypes(TOYACr‑l9941〜19942)at TovamaScienceMuseum,3paratypes,(OMNHAr‑7758‑7760)atOsakaMuseumofNamralHistoly,2paratypeg (KMNHIvR506,466〜500,467)atKitakyushuMuseumofNaturalHistoryandHumanHistory,and2paratypeg (NSMTCr‐20959)atNationalMuseumofNamreandScie、Ce,Tokyo

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Fig.1.L"c 〃j【たsyOル0" n.sp.

A,DorsalviewぅB,Frontalviewofcephalon;C,Antennuleうり,Antenna;E,Rightmandible;

Maxillula;H,Maxilla;IMaxilliped;J,Penesandmalepleopodl;K,Exopodofthesame;L,

M,Pleopod3ofmale;N,Pleopod4ofmaleラO,Pleopod5;P,ExopodoffemalepleopodlラQ R,Uropod;S,Positionofnodulilateralis(A‑O,R‑S,Holotypemale;P‑Q,Allotypefbmale).

F,Lefimandible;Gシ Malesecondpleopodラ Pleopod2offemale;

34

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AnewL,"c jor〔たsfTomnestmaterialof,Mbgem

Desc"o〃q/版α/e:Body22timesaslongaslongwide(FiglA)Anterolateralangleofcephalonprotruded Posteriormarginofpereonalsomitesl‑2sinuate,Coloralmostwhite,slightlypalebrown、Pereonalsomltesalmostpar‑ alleLPleotelsonwitharoundedtipPositionofnodulilateralis(FiglS)onpereonalsomites2‑4remotefTomthelateral

border、

Antennule(Fig.1C):3−segmented,terminalsegmentwith7shortaesthetascsondistalmargin・Antenna(Fig」D): tenninalflagellarsegment2・Otimeslongerthanbasalone・

Rightmandible(FiglE):parsincisiva3‑headed;laciniamobilisnotchitinizedandslightly2‑headedラaplumose setaうprocessusmolarisrepresentedbyatufiofsetae・LeRmandible(FiglF):parsincisiva3‑headed;laciniamobilis chitinized3‑headedラ3plumosesetae;processusmolarisrepresentedbyatufiofsetae・Maxillula(F鴫lG):innerlobe with2plumosesetaeandasmallacuteprQiection;OuterlobewithlOsimpleteethMaxilla(FiglH):relativelynar‐ row・Maxilliped(Fig.11):enditerectangular,with3spursandsetaeondistalmarg1,;palprelativelynarrow・

Pereopodl(Fig2A):basis31timesaslongaswideラischiumhalfthelengthofbasis,with9‑lOsetaeonlnner margln:merus0.7timesaslongasischium,withll‑l2setaeincludingsomebifilrcatedonesonlnnermargln;carpus l7timeslongerthanmerus,withl5‑l6setaeonlnnermarg1n;propodusO、8timesaslongasca1pus,with4setaeon

lnnermargln・

Pereopod2(Fig2B):basis29timesaslongaswide;ischium65%aslong;asbasis,withlO‑l2setaeonlnner marginand3setaeonoutermargln;merus0.7timesaslongasischium,withmorethanl8setaeincludingasbifUr‑ catedoneonlnnermarglnand3setaeatouterdistalangleぅcarpusl4timeslongerthanmerus,Withmorethan33 1ongSetaeincluding3trifUrcatedones;propoduswith81ongerandseveralshorteronesonmnermarginandlOshort

setaeonoutermargln、

Pereopod3(Fig2C):basisa7timesaslongaswide;ischiumhalfthelengthofbasis,with2setaeonoutermar‐

91,;merus0.6timesaslongasischium,withl3‑l4setaeon1nnermarginandasetaatouterdistalangle;carpusL6 tlmeslongerthanmerus,with24‑25setaeincludingbifUrcatedortrihlrcatedlongeronesonlnnermargm;propodusO、7 tlmesaslongascalpus,with7‑81ongerandseveralshortersetaeonlnnermarglnandl2‑l3setaeonoutermargln

Pereopod4(Fig2D):basis27timesaslongaswideラischiumO、6timesaslongasbasis;merusO6timesas longasischium;calpus1.4timeslongerthanmerus,withl7‑l8setaeonmnermargin,4−5setaeondistalmarglnand l2‑l3setaeonoutermarglnラpropodus1.2timeslongerthanca1pus,with9‑lOsetaeonmnermarginandlO‑llsetae

onoutermargm、

Pereopod5(Fig2E):basis29timesaslongaswide;ischiumQ6timesaslongasbasis,with2setaeondistal outerarea;merus0.7timesaslongasischium,withl5‑l6setaeonlnnermarglnand2setaeatouterdistalpart;

carpus1.2timeslongerthanmerus,withl4‑l5setaeincludinglongonesラpropodusO、8timesaslongascarpus,with 7setaeincluding3bifilrcatedonesonlnnermargln,

Pereopod6(Fig2FandG):basis3.7timesaslongaswide,withmanylongsetaeonleftsurfaceうischiumO、6 t,mesaslongasbasis;merus0.6timesaslongasischium,with7‑8setaeonlnnermarg1n;caIpus1.6timeslonger thanmerus,withlO‑l2setaeincludingabifUrcatedoneonlnnermargln;propodusaslongascarPus,with7setaeon 1nnermarglnandl3‑l4setaeonoutermargln・

Pereopod7(Fig2H):basis3.4timesaslongaswide;ischiumO6timesaslongasbasisandspreadingtoward thedistalarea,withabout30setaeonmnermarg1nandaboutlOsetaeonoutermargln;merus85%aslongas ischium,withmorethan20setaeonmnermargl、;calpusalittlelongerthanmerus,outermarginraisedroundly,with 9‑lOsetaeon1nnermargin2‑3setaeonoutermarg1n;propodusl、ltimeslongerthancamus,withll‑l2setaeon1nner marginandsetaeonoutermargln、

Penes(FiglJ)fUsifbnn,withacutetlp

Pleopodl(FiglJandK):endopodstraightandapicalareabentsoutward,withaserlesofmorethan30 denticlesonapicalarea;exopodrectangularextemalmarginslightlysinuate,withavervshallowconcavltyandaseta ondistalmargln.

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(5)

NoboruNunomura

Fig.2L〃casj 火SVC"" 、.sP,

A−E,Pereopodsl‑5;F,Pereopod6G:basisandofischiumofthesameintheoppositeside;H,Malepereopod7三 I:Femalepereopod7.(A‑H:Maleholotype;I:Allotypefemale).

Pleopod2(FiglL):endopodslendertowardthetipandslightlyexceedingthetipofexopod;exopodlongand triangular,withmorethanl5shoItsetaeonoutermarginPleopod3(F唱1M):endopodrectangular;exopodtriangul with9setaeonoutermarginPleopod4(FiglN):exopodtriangularwith9setaeonoutermarginPleopod5(F唱里 O):exopodtriangularbutalittlesmallerthantheprecedingones,with6setaeonoutermarginandmanvsmallsetae

onmiddlearea,

Uropod(FiglR):basisrectangular;endopodl4timeslongerthanbasis,withamftoflongsetaeatthetip3 exopodslightlylongerthanendopod,withmanysetaeonlnnermargin,l6‑l7setaeonoutermarginandseveralsetae atthetip,

陸加α/e:Roughlysametomaleexceptofsexualcharactersandshapeofpereopod7differs廿omthatofmale Numberofsetaeonoutermarginofexopodofpeopodslessnumerousthanthoseofmale(Fig2Q).

ECOノo副ノ:Thepresentnewspecleswerefbund廿omthenestmaterialinthemnnelofMogerajmajz"加戊,togelher withotherisopods,Exα"o"jsc"scor"jandPo7 "jo a6er,andanant,庇〃α碗o〃"沈む"shj碗αe、

E〃"o/o幻ノ:Thepresentnewspeciesisnamedafterthecollector,Dr・YasuharuYokohata・

Rem肺:ThepresentnewspeciesismostcloselvalliedtoL"cjoj昨sα脚αe"sjsNunomura,2008,butthefbr‑

merlsseparated廿omthelatterinthefbllowringfeatures:(1)presenceofsomesetaeofdistalmarginofmale価r駁 pleopod,(2)triangular廿ontalmarginofcephalon,(3)remotepositionofsetaeon3rdpereonalsomite,(4)presenc瞳

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AnewL"c io/〔たshomneStmaterialofMbg a

ofmanylongsetaeonischiumofmalesixthpereopodand(5)presenceofsetaeonoutermarglnexopodofmalesec‐

ondpleopod.

Re従rences

Nunomura,N・1987.SmdiesontheterrestrialisopodcrustaceansinJapanⅣ、TaxonomyofthefamiliesTrachelipidae

andPorcellionidae.B""、7byα〃αScj.〃iィs・11:1‑76.

Nunomura,N、,1991.SmdiesontheterrestrialisopodcrustaceansinJapanⅥ、Furthersupplementstothetaxonomv

β""、Zhya流α5℃iMjイ&,14:l‑26

Nunomura,N、,2000.TerrestrialisopodandamphipodCrustaceansfi・omthelmperialPalace,Tokyo.〃セ"?、MJmS

M′S Tb勺o,5:79‑97.

Nunomura,N,2003.TerrestrialisopodcrustaceansftomsouthemKyushu,SouthemJapanB"".Zbyα脚aScj.〃,26皇

22‑45.

Nunomura,N,2007.Terrestriallsopods廿omHach1olsland,middleJapan.B""、7byα畑αSMZ′s、,(30):17‑36. Nunomura,N,2008TwonewspeciesofthegenusL"cjoi火s(Isopod)mmmole'smnnelsofNanto‑shi,Toyam&

middleJapanB"".Tbyα"zaSa. ィs,,31:3‑11.

Nunomura,N,2009.TerrestriallsopodCrustaceansfTomDaitolslands,SouthemJapanB""・Tb)ノα"2αSM2心32:75

‐87.

Nunomura,N,2010.AnewspeclesoftheGenusL"cjoj昨s(Gnlstacea:Ispoda)fiomAshiu,Miyama,Nantan‑shi, Kyoto,CentralJapanB""、7byα脚αS℃瓜M"&33:(inpress).

Schmalhlss,H,2003.WorldCatalogofterrestrialisopod(Isopods:Oniscidea)S加""gα"erBe/".MJ""kS.A65

4:1−341

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参照

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