The Scutacarid Mites of Japan (13)Two New Archidispus Phoretic on Carabid Beetles Mainly Belonging to the Pterostichini and Harpalini

2005·6.6 MB·

by  Kurosa, K

Elvt,・a,To;lio,33(1):3-12,May30,2005
TheScutacaridMitesofJapan
XIII.TwoNewA,chidispusPhoreticonCarabidBeetles
MainlyBelongingtothePterostichiniandHarpalini
Kazuyoshi KURosA
Nishi-Ikebukuro5-21-l5,Tokyo,171-0021Japan
Abstract Twonewspeciesofscutacaridmites,Alc/tldispuschuJo1andA tone-
gawanus spp nov aredescribedfromJapanbasedonphoretomorphicfemalesfoundon
thecervicalmembranebetweenheadandprothorax,orintersegmentalmembranebetween
pro-andmesothoraxofcarabidbeetlesmainlybelongingtothetribesPterostichiniand
HarpaIini.
Thirty-sevennamedspeciesofthegenusArchldispushaveso farbeenrecorded
fromJapan.Ailofthemareknowntobephoreticoncarabidbeetlesinabroadsense.
Twomorenewspeciesofthegenusaredescribedinthispaperonthebasesofphoreto-
morphicfemalesfoundonthecervicalmembranebetweenheadandprothorax,or in-
tersegmentalmembranebetweenpro-andmesothoraxof18Japanesecarabidspecies
mainlybelongingtothetribesPterostichiniandHarpalini.
Theterminologyofthebodystructuresandthesetalnotationmostlyfollowthose
ofLINDQUIST(1986).Allmeasurementsaregiveninmicrometers(ｵm). TheRCC3
index(ratiooflength(ordistance)ofanystructuretothemutualdistanceofanterior
coxal condylesIIIX100) (KuRosA,1989) isused for theconvenienceofdescription.
Themeasurementsof leglengthsandmutual distanceofanteriorcoxal condylesIII
usedhereinarethesameasthoseexplainedinthelastpaperofmine(KuRosA,2003).
ThepresentpaperisdedicatedtothememoryofthelateDr.MichioCHuJ0,who
passedawayinJune2004. IwishtoexpressmygratitudetothelateMr.YoshioYano,
Messrs. Fumitaka IKEDA (Fukurono-shi), Takashi OKuMuRA (Yokohama-shi), Soi
SAKURAl(Niitsu-shi),MasaakiSAToU(Takamatsu-shi),MasaharuTAKABA(KanaZaWa-
shi),TakanobuTAKAHAsHl(Saga-shi)andmyson,Yoshiro,forsupplyingwiththema-
terialusedinthisstudy.
ArchidispuschujoiKURosA,spnov.
(Figs.1-3,5)
Atchidispussp.No.16:KuRosA,1977,p.394,fig.V-C;2000,p.915,fi9.14.
phoretomorphjcfemale.Bodylength(lengthofidiosoma)162-215;bodyWidth
KazuyoshiKURosA
(widthofopisthosoma1plateC)137-170;mutualdistanceofanterior coxal condyles
79-92(mean85.7+S.D3.05,n=27).Gnathosoma1capsuleshort forthewidth.
Dorsum(Fig.1).FreemarginofplateCmediuminwidth,withradialstriations
faintlyvisible.Dorsalsetaeofopisthosomamoderatelylongexcept forhi,withbarba-
tions;cl,dandfarrangedintwosubpara11e11ongitudina11ines,weaklyswolleninbasal
1/4orthereabouts,usuallyhavingsomewhatstrangulatedappearance,notfinedistally;
clinsertedslightlyanteriorto,and(usually)slightlyshorterthanc2,whichissimilarin
shapetocl;marginalthickeningofalveolusforc2usuallywithaveryshort (2.5-4.5
long), indistinct,posteromesa1protrusion; ratioofmutualdistanced-dif-f l.16-1.35;
hi t74-1.97timesas longasf Theorder inlengthofdorsa1opisthosoma1setae:
hi>h2>e>f-d>c2>cl.
Venter (Figs 2,5).Apodemeswelldeveloped;apodeme2smoothlyarcuate(the
curvatureisoftenweakinmedial2/5),sometimesconjointlyformingaveryobtusere-
entrantanglemedially;secondarytransverseapodeme(CROSS,1965)distinct,weakly
postcurvedor(rarely)almoststraight,crossingpresternalapodemeatalevelslightly
posterior toposteriormostpointofapodeme2;apodeme3pronounced;apodeme4
usually rectilinear,weaklyproclinateor (rarely)horizontal, laterally reachingcuticular
thickeningbycoxal foramen111.Posterior genital sclerite rathersmall. Coxalsetae
simplysetiformexcept for Iaand4a,faintlybarbedexcept for4a; Iainsertedslightly
anteriortotheleve1ofposteriormostpointofcamerostome(=gnathosoma1foramenof
CROSS,1965),nearlyofthesamethicknessthroughoutexcept fordistaf f/5or there-
abouts;2acloseby,andslightlyanteriorto2c;3a fullyreachingapodeme4;3bsome
distanceposteriorto3a,considerablyapart frompoststerna1apodeme; ratioofmutual
distance3b-3b/3a-3a2.51-2.73; 3croughlyon thesamelevelas3b; 4aalittlecloser
to level of4bthantoapodeme4,distinctly thickenedand(sometimes)slightly in-
curvedinbasalhalf,thetransitionfromthicktothinportionratherabrupt;4binserted
closetoposteriorendofcoxal foramen IV;slender,never thickenedbasally, usually
weakly incurved or almoststraight. Pseudanal setaeps1and ps3moderately long,
weaklybarbed;ps3slightlylongerthanps1;ps2about1/3thelengthofps1.
Legs.Generallymoderateinlengthandthickness. LegI: femoralsetad foljato;
tibiotarsusnotstout;solenidion(plsubclavate;ω1finger-shaped;(p2andω2uniformly
thin;theorderinlengthofsolenidiainsomeexamples:ω2(16_18)=(p2(15_18)>ω1
(8-11)≧(Pl(8-10).LegsIIandIII:tibialsolenidion(prodlike,8-10inlength;tarsal
SolenidiOnωsubfusiform,9-11inlength;anteriorclawnearlytwicethesizeofpesto_
「Oi「one,emPodiummedium-sized.LegIV(Fig13):tarsusmoderatelyelongated;prox_
imalPoltOinofta「Sususuallyratherstronglywidenedfrombasetojnserljonsofsetae
PV andto';P「eta「SuSratherwellelongated;lengthratioofpretarsustotarsus060_
0・65;feme「alandtibialsetaednotmuchdifferentinlengthfromeachotherandfrom
tibialSeta1',nea「lyalwaysalittlelongerthantarsus,notfinedistally,wjthbluntly
Pointedapex;tibialsolenidion(pit-14inlength;tarsalsetap″i insertedclosetobase
ofto';clawssmall;empodiumsmall,long-stalked.
RCC3indices(n=10).Bodylength207-238,bodywidth162_176.Lengthand
ScutacaridMitesofJapan,XII]
Figs. 1-2. ‘A.,chldispusc/1uJoiKURosA,sp nov.,phoretomorphicfemale;1,dorsalaspect;2,ventralas-
pect.SlightlymodifiedfromKURosA,2000.Scale:50ｵm
mutualdistance(inparentheses)ofopisthosoma1andcoxalsetae:cl33-39(63-67),c2
39-43 (129-137), d42-49(81-90),e58-64 (146-155), f44-51(67-76), hi 82-94
(33-38),h266-78(106-118),psl30-37(12-14),ps210-13(18-20),ps334-42(79-
86), ta42-51 (31-35), lc30-37(62-66),2a32-39(55-59),2c30-39(64-67),3a
31-36(26-29),3b44-52(72-77),3c33-40(96-99), 4a20-24(34-37), 4b5l-57
(77-80),4c51-56(92-94).Lengthoflegs(includingsomesegmentsandsomesetae
oflegIV): leg157-70, leg1190-99,leg111112-122, legIV159-167(tarsus44-48,
pretarsus25-29,Fe-d52-61,Fe-v'30-35,Ti-d54-67,Ti-1'55-67,Ta-to'96-112).
Nonphoretomorphlcfemale,maleandlarva. Unknown.
Host. Allthespecimensexamine about170phoretomorphicfemalesintotal,
werecollected fromthe followingcarabidbeetlesbelongingto fourtribes:
TribeBembidiini - Bembidion(Notaphocm,tpa)n11oticumbatesiPuTzEYs; tribe
KazuyoshiKURosA
Figs.3-4. Alc/1idispilsspp nov.,phoretomorphicfemale,leftlegI、lventralaspect. - 3,A.c11uJoli);
.
4,A tonegaH'amls.Scales:50ｵm.
Pterostichini - Chlaeminus annamensls TscHITscHERINE, Pterostichus (Poec11us)
planlco11is(MOTSCHULSKY),P.(Rhagadus)mlcroc°phalus(MoTscHULsKY),P.(Euり1-
thoracana)haptodelo' idesJapanensisLUTsHNIK;tribePlatynini - Platymts(Agonum)
daimio(BATES),Colpodes(Ettcolpodes)Japonlcus(MoTscHULsKY);tribeHarpalini -
mSOdaC uS unCfafzpemzs MORAWITZ, arpafzfs (Pseudoop omis) Jtffece z
(JEDLCIKA),Steno1ophus (Steno1ophus)connotatusBATES,S. (S) iridico1orREDTEN-
BACHER,S.(S) ku1'osa1TANAKA,S. (Egadroma)qulnquepustulatus(WIEDEMANN),S.
(E)dj cills(HOPE)andAnop1ogenluscyanescens(HOPE).
1)Proximalportionoftarsusisusuallymorestronglywidenedfromthebasetotheinsertionsofsetae
to'andpv'thanillustrated.
ScutacaridMitesofJapan,Xm
Thephoretomorphic females were foundexclusively attached to the cervical
membranebetweenheadandprothoraxofthehostbeetles,withtheexceptionoftwo
specimensfromtheintersegmentalmembranebetweenpro-andmesothraxofS. irzd1-
co1or andAno.cyanescens. Thelargestnumber ofmitesper hostwas 11 (on Ano.
cyanescens).
The femalemitesofthenewspecieswere frequently foundincoexistencewith
thoseofoneortwoothercongenericspeciessuchasA.consplcuusKuRosA,A fo(liatus
KURosA,A fuslftormisKURosA,A. insolitus(KURosA),A.1ongicaudatusKURosA,A
masatakai KURosA, A. papluosus KURosA, A. prox;Imus KURosA and A. 1'ost1'atus
KURosA,onthecervicalmembraneofeachhostbeetle.
Type material. Holotype (KuRosA 20235-1): Torami, Ichinomiya-machi,
ChibaProf., Honshu, Japan, ex Anop1ogenluscyanescens (HOPE), 2-IX-1975, K.
KuRosA leg.Paratypes: [Honshu]22 ,samedataasholotype;3 , same dataas
holotypebut27-VII-1976;1?,samedataastheprecedingbutexPl daimio;3
,
samedataasholotypebutexS kurosai;5 Kita-Kogane,Matsudo-shi,ChibaProf.,
,
exAno.cyanescens,1-XII-1975, T. 0KuMuRA;1 Sekiyado-machi,Higashi-Katsu-
,
shika-gun,ChibaProf.,exS. lridlco1or,8-XI-1971,K.KuRosA;1 Riv. Tone-gawa
,
by Toride-shi, Ibaraki Prof.,exPt encopoleus, 17-IX-1972, K.KuRosA; 1 , same
dataastheprecedingbutexPt mlc1-ocephalus;3 ,samedataastheprecedingbutex
Pt h.Japanensis; 1?,samedataastheprecedingbutexAni.punctalipennis; 3
,
samedataastheprecedingbutexAno.cyanescens;2 ,samedataasthepreceding
but ex S.connotatus; 17 ,samedataastheprecedingbutexS diffic11zs;1 , same
data as the preceding but 2-IX-1971; 1 Misono, Itabashi-ku, Tokyo, ex Ano.
,
cyanescens,5-IX-1967, K. KuRosA; 2 Toyoda-machi, Iwata-gun,ShizuokaPref.,
,
exS dj?cills,1~9-VIII-1981,F. Ikeda;11 Niitsu-shi,NiigataPref,exS. iridi-
,
co1or, 3-VII-1971,S. SAKURAl; 1 Ibaraki-shi, OsakaPref.,exB n batesi, 3-111-
,
1940, Y. YANo; [Shikoku] 1 Matsushima-cho,Takamatsu-shi, KagawaProf.,exS
,
difficais, 7-VII-1974, M.SATou; 2 Yashima, Takamatsu-shi, KagawaPref., ex
,
Ano.cyanescens,6-V-1974,M.SATou;1 0da-cho,Kami-Ukena-gun,EhimePref.,
,
exH.Jureceki, 11-IX-1988,Y.KuRosA; [Kyushu]1?,Mae-shimaIs.,Matsushima-
ch0,KumamotoPref.,exS dlfficilis,5-VIII-1975,Y.KuRosA; [Ryukyus]1?,Nago-
shi,0kinawa-hontoIs.,OkinawaPref.,exSqinquepustulatus,4-V-1973, K. KuROSA;
1 Maesato, Ishigaki-jimaIs.,OkinawaPref.,exSquinquepltstulatus,1-X-1975,T.
,
TAKAHAsHl;6 Mt.Banna-dake,Ishigaki-jimaIs.,OkinawaPref.,exSquinquepus-
,
tulatlts,30-IV-1973,K.KURosA; 2 Sonai,Yonaguni-jimaIs.,OkinawaP「of.,ex
,
Ch annamensls,7-V-1979,Y. KuROSA.
Furtherspecimensexamined. Inadditiontoabout 70specimenswiththesame
data as the type series, the following were examined: [Honshu] 1 NarimaSu,
,
Itabashi-ku,Tokyo,exCo.Japonlcus,1-X-1958, K. KuRosA; 1 ,samelocality and
collectorasthepreceding,exS d cills,22-VI-1958;1?,samelocalityandco11eCtO「
asthepreceding,exSquinquepltstulatus,30-VII-1958;2 Wakamatsu, Kanazawa-
,
shi. IshikawaProf.,exS.1ridico1or,29-VII-1970,M.TAKABA;1 Uenoshiba,Sakai-
,
KazuyoshiKURosA
Figs.5-6. PhotomicrographsofA,・c1/1displlsspp nov.,phoretomorphicfemale,gnathosoma.coxistema1
platesandapartofopisthosomalventer. - 5.A.cillリ01;6.A to11ega、、,antls.
shi,OsakaPref.,exS. iridico1or,11-IV-1940,Y.YANo.
Typedepository. TheholotypeisdepositedinthecollectionoftheNationalSci-
enceMuseum(Nat.Hist),Tokyo(NSMT),Japan.Severalparatypesaredistributedto
the followingmuseumsor institutes: Institut fiirZoologie,Universitat Graz,Graz,
Austria;InstituteroyaldosSciencesnature11esdeBelgique,Brussels,Belgium;Zoo1o-
gisches Museum der Universitat Hamburg, Germany; National Museum of Natural
History,Budapest,Hungary;NikitaBotanicalGardens,Yalta,Ukraine;NationalMu-
seumofNaturalHistory,Washington,D.C.,U.S.A.Theremainingparatypesarenow
retainedinmycollection,butwillbedepositedinNSMTlater.
Distribution. Japan(Honshu,Shikoku,KyushuandRyukyus).
Etymology. ThisnewspeciesisnamedinhonorofthelateDr.MichioCHuJ0,
Whowasoneofthemosteminentcoleopterologistsinourcountryandpersonallyen_
couragedmeinmyentomologicalandacaro1ogicalstudies.
Remal'ks. Thephoretomorphic femaleof thisspecies issimilar to thoseof
ArChidispusc'a'ssi1a' di)cKUROsA,1989,andA kurosai MAHUNKAet RAcK, 1990(re-
placementnameforA.similisKuRosA,1989),bothfromJapan,butcanreadilybedis_
ScutacaridMitesofJapan,XIII
tinguished fromthembythefollowingrespects:1)coxalseta4aisinsertedsomewhat
closer tolevelof4bthantoapodeme4(4aismuchcloser toapodeme4than tolevel
of4b in theother twospecies); 2)coxal seta4bismuchthinner, never thickened
basally;3) lengthratioofpretarsustotarsusoflegIVisclearlydifferent (0.61-0.65in
. c uJol, 0.41-0.49 in . cMass1l,affix, 0.41-0.48 in u,,osaf). Thenewspeciesis
.
consideredacloserelativeoftheabovetwospeciesandthreeotheralliedspecies,
.
ripariusKURosA,1990,A.pro)clmusKURosA,1990andA.ohtanli KURosA,1990,all
fromJapan.
Archidispusto,toga、,'anusKURosAsp nov.
(Figs4,6,7-8)
Phoretomorphicfetmale. Bodylength(lengthofidiosoma)196-216;bodywidth
(widthofopisthosoma1plateC)157-190;mutualdistanceofanteriorcoxalcondyles
81-94(mean88.2±S.D 3.46,n=14).
Dorsum(Fig 7).FreemarginofplateCratherwide,withradialstriationsfaintly
visible.Dorsalsetaeofopisthosomanotmuchdifferentinlengthfromeachother,gen-
erallymoderately longand rather thick,blunt-tippedexcept for eandh2,withweak
Fjgs 7_8 Archjdjspustonegc1、,vanusKURosA,sp nov.,phoretomorphicfemale;7,do「Salaspect;8,Ven-
tralaspect.Scale:50ｵm
10 KazuyoshiKuRosA
barbations;cl,dandfarrangedintwosubparallel longitudinal lines;cl insertedwell
ante1iorto,andusuallyslightlyshorterthanc2; ratioofmutualdistanced-dif-f l23-
1.31;hi1.22-1.33timesaslongasf Theorderinlengthofdorsa1opisthosoma1setae:
h2≧e≧hi>d>f>c2:>cl.
Venter (Figs 6,8). Apodemeswelldevelopedexcept forsecondarytransverse
apodeme;apodeme2smoothlyarcuate,sometimesconjointly formingaveryobtuse,
backwardanglemedially;secondary transverseapodemeweak,straight orslightly
postcurved, oftenobliterated in lateral half of each side, almost or fully touching
apodeme 2 medially; apodeme 3 pronounced; apodeme 4 slightly proclinate
or
procurved,laterallyreachingcuticularthickeningbycoxal foramen111.Posteriorgeni-
talscleritecomparativelylarge.Coxalsetaesimplysetiformexcept for4a,4band4c,
faintlybarbedexcept for4aand4b; Iainsertedslightlyanteriortotheleve1ofposteri-
ormostpointofcamerostome, fairlyapart fromeachother;2acloseby,andslightly
anteriorto2c;3aextendingfarbeyondapodeme4;3bashortdistanceposteriorto3a,
considerably apart frompoststerna1apodeme; ratioofmutualdistance3b-3b/3a-3a
2.19-2.48;3croughlyonthesamelevelas3b;4anearlyequidistant fromapodeme4
andlevelof4b,distinctly thickenedand(usually)slightly incurvedinbasal2/5, the
transition fromthicktothinportionratherabrupt;4bdistinctlythickenedandweakly
incurvedinbasal t/3or thereabouts,thetransition fromthicktothinportiongradual;
4csomewhat thickenedproximally, graduallyattenuateddistad.Pseudana1setaeps1
andps3short,weaklybarbed;ps3alittlelongerthanpsl;ps2about1/2aslongasps1.
Legs. Generallymoderateinlengthandthickness.LegI: femoralsetadfoliate;
tibiotarsussomewhatstout;solenidion(plsubclavate;ω1finger-shaped;(p2andω2uni-
formlythin;theorderinlengthofsolenidiainsomeexamples:ω2(15-19)≧(p2(13-
16)>a)1(10-13)>(pl (8-10). Legs II and III: tibialsolenidion (p rodlike, 8-10 in
length; tarsalsolenidionω finger-shape 7-10inlength;anteriorandposteriorclaws
subequa1,mediuminsize;empodiumalsomedium-sized.LegIV(Fig 4): tarsusand
pretarsusmoderatelyelongated;proximalportionoftarsussomewhatstronglywidened
frombasetoinsertionsofsetaepv'andto'; lengthratioofpretarsustotarsus0.42-
0.46;femoralandtibialsetaednotmuchdifferentinlengthfromeachother,nearlyas
longastarsus,notfinedistally,withbluntlypointedapex;tibialsolenidion(pit_12jn
length;tibialsetal'alittlelongerthantibialat;tarsalsetap″i insertedclosetobaseof
to';clawssmall;empodiumsmall,long-stalked.
RCC3indices(n=6).Bodylength216-233,bodywidth194_207.Lengthand
mutualdistance(inparentheses)ofopisthosoma1andcoxalsetae:cl37_
39(61_66),c2
42-43(146-158),d49-57(79-86),e57-67(167-178),f41_45(59_69),hi55_5g
(37-42),h262-74(114-123),ps123-31(11-13),ps211-13(16_19),ps331_35(77_
86), Ia31-43(38-44), lc34-38(63-65),2a29-40(51-56),2c31_32(61_63),3a
38-42(29-31),3b46-51(71-73),3c40-44(98-103),4a27_30(39_42),4b45_55
(69-71),4C51-58(90-96).Lengthoflegs(includingsomesegmentsandsomesetae
ofIo9IV):1e9I55-67,legII97-101,leg111105-121,legIV156_169(tarsus50_53,
P「eta「SuS21-24,Fe-d48-51,Fe-v'31-38,Ti-d42-48,Ti-1'56_64,Ta_to'82_g4)
ScutacaridMitesofJapan,XIII
Non-phoretomorphicfemale,maleandlarva. Unknown.
Host. Specimensexamined,14phoretomorphicfemalesintotal,werecollected
fromthefollowingcarabidbeetlesbelongingtotwotribes:
Tribe Pterostichini - Pterostlchus (Poecilus) planlco11is (MoTscHULsKY), P.
(Rhagadus) microcephalus (MoTscHULsKY), 1) (Lagartis) sulcitarsis MoRAwlTz, Fl
(Melanlus) rotundangulusMoRAwITz, P. (Ettり,thoracana) haptode1'oidesJapanensis
(LUTsHNIK);TribeOodini - Lachnocrepis(Eulachnoc1,opts)pro,lixa(BATES).
Themiteswerefoundattachedtotheintersegmentalmembranebetweenpro-and
mesothoraxof thehostbeetle,withtheexceptionofoneexample fromthecervical
membranebetweenheadandprothoraxofL.prolixa.Thenumberofmitesper host
was t er2. Thisspeciesseemstobeuncommon inthe KantoDistrict inHonshu,
Japan.
Oneoftheparatypespecimenswas foundincoexistencewithfive femalesofA
kur・osaiMAHUNKAetRACKandonefemaleofanundescribedArchidispusspecieson
anindividualof1:)microcephalus,buttheattachingsiteofthelattersixspecimenswas
thecervicalmembrane,unlikeA tonegawanus.
Typematerial. Holotype (KuRosA 21107): Riv. Tone-gawaby Toride-shi,
Ibaraki Pref., Honshu,Japan,exPterostichus(Poecilus)planlco11is(MoTscHULsKY),
2-IX-1971,K.KuRosAleg.Paratypes:[Honshu]3 ,samedataasholotypebutex
sulcltarsls;4 ,samedataasholotypebutex p rotundanguhis;3 ,samelocality
andcollector asholotype,expmicrocephalus,17-IX-1972;2 ,samedataas the
precedingbutex p h.Japanensls; 1?,Tajima-ga-haraby Riv.Ara-kawa,Urawa-shi,
SaitamaProf.,exL.prolixa,1-IX-1971,K.KURosA.
Typedepository. TheholotypeispreservedinthecollectionoftheNationalSci-
enceMuseum, Tokyo(NSMT),Japan. Theparatypesarenow retainedinmycollec-
tion,butwillbedepositedinNSMTlater.
istrzbutzon. Japan(Honshu).
Etymology. ThespecificnamereferstotheTone-gawa,onwhoseriversideall
butoneofthehostbeetlesofthetypematerialwerecollected.
Remarks. Thephoretomorphic femaleofthisspeciessomewhatresemblesthat
ofA dip1oiKURosA,1991, fromJapan,butcanbedistinguished fromthelatterby
manyfeatures,especiallythefollowing:bodysmaller;dorsa1opisthosoma1setacl in-
sertedwellanteriortoc2;coxalseta4bmuchshorteranddistinctlythickenedproxi-
mally; legsnotslender;setadoffemurIVnearlyaslongastarsusIV;setadoftibia
Ivbluntlypointedalapex.Thesetwospeciesareconsideredtoberatherremoterela-
tives.
要 約
黒佐和義:日本産ヒサシダニ科の研究xm.主としてナガゴミムシ族とゴモクムシ族のゴミ
ムシに便乗するAlch1・djsptls属の2新種. - ヒサシダニ科Scutacaridaeに属するA''chidisPuS属
ロッパ・北米などから約50種が知られているが, 若干種において雌成虫
のダニは, 日本. ヨー
12 KazuyoshiKURosA
に著しく体形の異なる2つの型一昆虫に付着する便乗型雌(phoretomorphicfemale)と昆虫に付
着する習性のない非便乗型雌(non-phoretomorphic female) - を生じることが明らかにされてお
り, これはこの属全体に共通の現象であろうと考えられる. わが国からは, これまでに, 歩行
虫類の成虫に付着した状態で見出された便乗型雌に基づいて, 37種のA,chidispusが報告されて
いるが, なお, かなりの数の種が未記載のまま残されている. 今回は主としてゴモクムシ族と
ナガゴミムシ族のゴミムシに見出される2新種を, A.c1/uJoiおよびAtonegawanusと命名し記載
する. A.chujo1はA.c・tassi1adixKURosA,1989とA ku,-osa1MAHUNKAetRACK,1990(=A.sim出s
KuRosA,1989)に多くの特徴で一致し, この2種および同じ論文で記載したA.,-1parius,A.p,・o-
ximus,A.ohtaniiの3種に近緑のものと考えられるが, 基節毛4bがかなり細く基部で太まること
がまったくないことで容易に判別できる.Ato11egawanusはAdip1oiKuRosA,1991にやや似るが,
体の大きさ, 後体部背面の毛c,の位置,基節毛4bの長さと形状, 脚の太さ, 第4脚の毛の長さ
と形状, そのほか多くの点で異なり, 系統的にはあまり近緑でないと考えられる.
本論文は昨年6月に逝去された中條道夫先生から永年にわたり温かい励ましを頂いたものと
して, 先生の死を心から悼み捧げるものである.
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