A New Species of the Genus Synapsis (Coleoptera, Scarabaeidae) from Laos

2007·4.9 MB·English

by  Ochi, T

Elytra,Tokyo.35(1):91-95,May30,2007
A NewSpeciesoftheGenusSynapsis(Coleoptera,
Scarabaeidae) from Laos
Teruo OcHI
Kofudai5-21-6,Toyono-cho,Toyono-gun,Osaka,563-0104Japan
and
Masahiro KoN
School ofEnvironmentalScience,TheUniversityofShigaPrefecture,
Hassaka-cho2500, Hikone,Shiga,522-8533Japan
Abstract AnewspeciesofthegenusSynapsisisdescribedfromLaosunderthe
nameofS.satoisp nov. ItresemblesS tridensSHARPbutcanbedistinguishedfrom
thelatterbyhavingthepronota1anterioranglewithfourteeth.
Uptothepresent,21speciesofthegenusSynapsis(Coleoptera,Scarabaeidae)have
beenknownfromthePalearcticandOrientalRegions(BALTHASAR,1963;KRAL,2002;
KRAJcIK,2006). Recently,wehavehadanopportunitytoexamineastrangeSynapsis
specimenfromLaos. ThisformissomewhatsimilartoS tridensbut distinct from the
latteraswellasanyotherknowncongenersinseveralexternalcharacters. IntheP「eSent
paper,wearegoingtodescribethenewspeciesofSynapsisfromLaos,andtodedicate
jttothelateDr.MasatakaSAT0,whowasaneminent figureintheJapaneseColeOPte一「
ole9y.
Synapsissatoi OcHIet KoN,sp n ov.
(Figs.1-2)
Length:29.5mm;width:16.3mm(n=1).
Bodymoderate_sized,broadlyoval,notsostronglyconvex;dorsalsideenti「ely
glabrous,subopaque;ventralsidepartlyclothedwithbrownhairs;metasternumalmost
glabrous;abdomenwitheachsternitealsoglabrous.Colourblack,withmouthpa「St and
palpjblackishbrowntoreddsihbrown;antennaewithclubsegmentsbrownishblack.
M ale. Headwjdelytransverse,subtriangularanteriadinoutline;clypeusdeeply
jncjsedatthemjddle,witheithersideoftheincisionstronglyreflexedandroundlylobed;
clypea1margindistinctlyreflexedandbroadlybordered,alittlesinuousoneachSideof
92 TeruoOcHIandMasahiro KoN
Fig.1. HabitusofSynapsissato1sp nov.,holotype,male,scale,5mm
the「oundlobes,obtuselyangulatealittlepriortoclypeo-gena1junction;clypeo_genal
Suturedistinctlydefined;genafairlystronglyproducedlateradasaprolongedsubtrjan_
9ula「P「oCeSS,sharplypointedandveryslightlytumidatapex,extendingnotclearly
beyondinnersecondtoothofpronota1anteriorangle;ocularcanthussomewhatdeve1_
oped,occupyinghalflengthofeye; fronsstronglyproducedupwardsasasubconjca1
tube「oleatthemiddlewhoseapexisrounded;vertexslightlyandtransverselydepressed
atthemiddlealittlebehindfrontaltubercle;surfacealittleshining,denselycovered
WithShorttransversewrinklesonanteriorhalf,thewrinkleschangingintogranuleson
Posteriorhalfexcept forvertexa1medianportionwhichisclearlysparselygranulate.
P「onOtummoderatelyconvex, fairlytransverse,about19timesaswjdeaslong
(n=1),Withafineshallowlongitudinalgroovealongmidline;anteriormarginbisinuate,
b「oadlybordered;lateralmarginsgentlyroundedatthemiddle,alittlesjnuousjnfront,
Clea「lybo「dered;anteriorangleseachwithfour teeth,theinnermostonestrongand
obtuse, theinnersecondonealsostrong,ratherpointed,alittlespaced fromthejnner
fl「St,thethirdandfourthonessmallerandobtuse;posterioranglesobtuse;baseobtusely
an9ulateatthemiddle,finelyborderedthroughout;discwithmedianportionclearlyand
t「anSverselyraisedinbasalhalfasasmoothandshiningarea,gentlydecljvousforwards,
NewSynapsisfromLaos 93
Fig 2. MalegenitaliaofSynapssi sato1sp nov.,holotype,male,scale,1mm;leftlateralView (left)
dorsalview (right).
thedeclivitybearinga transverseprominenceat themiddlewhoseanteriored9e Si
obtuse,short andslightlycurved; lateralcarinajoininglateralmargin in front and
behind;surfacealittleshining,denselycoveredwithrounddistinctgranulesexcept fo「
postero_median shining and smooth area and antero-median tubercle, the granules
becomingobviouslysparsernearanteriorangles.
Elytraa little wider than long, about 1.1 times as wideas ton9 (n=1); disc
moderatelyconvex,eachwithtenstriae,theistto7thstriaeextendingfrombasetonea「
apexbetweensuturalmarginandlateralcosta,the8thto10thalsoextendingfrombase
tonearapexbetweenlateralcostaandlateralmargin,theistandloth,the2ndand9th,
and the3rdand8th clearly joinedatapex, the4thand5th,andthe6thand7thnot
distinctlyjoinedatapex;allstriaefinelybutdistinctlygrooved,withfineridgesonboth
sjdes,eachridgeformingadottedline;stria1puncturesweakandindistinct;intervals
veryslightlyconvex,opaque, irregularlyandlongitudinallymicro-wrinkledormicro-
sculptured.
pygidium evenly andgently convex, somewhat opaque, transversely and finely
wrinkled, alittledenselycoveredwithsmall vaguegranules. Prepisternumwithout
excavation. Metasternum with abroad, rather distinct excavation alongmidline in
posterjor third;metasterna1shieldshining,glabrous,sparselycoveredwithfinevague
94 TeruoOcHIand Masahiro KoN
Punctures; lateralportionsrathershining thoughdenselymicro-reticulate, glabrous,
sparselycoveredwithsmallbut distinct granules. Abdomenwith2ndto5thsternites
shining,verysparselycoveredwithfinepunctures. Metafemurwithventralsidebearjng
asmall toothatbasal thirdonposterioredge;ventralsurfacealmostimpunctatenear
anterioredge, alittledenselycoveredwithsmall transversepuncturesnearposterior
edgeinbasalhalf;medial transversecarinaalongposterioredgeoccupyingdistalhalf
thoughpartlyinterrupted,intermittentlyclothedwithlonghairs. Protibiabroad,with
threeexternalteeth;theisttoothbroad,largest,the2ndalittlesmallerthantheist,the
3rdclearlysmaller; terminalspursharpandstrong,alittlecurvedoutwards,nearlyas
Ion9asthe ist toothandalsoprotarsa11engthnot includingtarsalclaws. Mesotibia
rathershort,graduallydilated frombasetoapex,withfiveexternal teeth(includjng
apicaltooth); thepenultimatetooth thelargestandplacedataboutbasaltwo-thirds;
dorso-externa1sidewithout distinct transversecarina. Metatibiaelongate, strongly
dilatedtowardsapex,moderatelyincurvednearapex; innerdistalendnotsostrongly
produced; lateralmarginwithsevenexternal teeth(includingapical tooth), thepenu1_
timatetooththelargest,locatedataboutapicaltwo-sevenths;dorsalsidedenselyfringed
withatuftoflonghairsalongwholelength.
Aedeagusmoderate-sized,about6.9mmintotallength;pha11obaseabout4.4mmin
length fromlateralview, about16mminapicalwidth fromdorsalview;parameres
about3.0mminlengthfromlateralview,withdorsallobesalittlewidelyseparatedfrom
eachother thanins. tridens, dorsalmembranealsoalittlebroader thaninS tridens.
Female. Unknown.
Typeseries. Holotype, Laos-Myanmarborder, Laos, VII-2003. Theholo-
,
typeisdepositedinthecollectionof theNationalScienceMuseum,Tokyo(NSMT).
Distribution. Laos.
Etymology. Thespecificnameisgiventothememoryof thelateDr.Masataka
SAT0.
Notes. ThepresentnewspeciesiscloselyrelatedtoStridensSHARPfromIndia,
MyanmarandThailand,butcaneasilybedistinguishedfromthelatterbythefollowing
characterstates:1)thebodyclearlysmaller (29.5mminlength),whereasinS tridens,
it Si larger (30.0-36.0mm);2) theheadwiththegenashorter,extendinglateradnot
Clearlybeyondtheinnersecondtoothofpronota1anteriorangle,whereasinS trjdens,
itislonger, fairlystronglyproducedlaterad,clearlyexceedingtheinnersecondtoothof
Pronota1anteriorangle;3)thepronota1anterioranglewith fourteethinsteadofbeing
th「ee; 4) thepronotum with a transverse prominenceat themiddlea little behind
anteriormarginwhoseanterioredgeisshortandslightlyconvex,whereasinS tridens,
ithasaclearlylargerprominencewhoseanterioredgeisfairlylongandstronglyconvex;
5) themetatibiaismoderately incurvedwithitsinnerdistalendnotconspicuously
produced,whereasins. tridens,itisstronglyincurvednear thedistalendanditsinner
distalendisconspicuouslyproduced;6)theparameresofmalegenitaliaaredifferent
from thoseof S tridensin theshapeof dorsal lobesanddorsalmembranes.
NewSynapsisfromLaos 95
specimencompared. SynapsistridensSHARP:1 , Kalaw, 1,350m inalt.,Shan,
Myanmar,20-IX-2003,M.KoNleg.
Acknowledgments
wewjshtoexpressourcordialthankstoM.FuJIoKAforliterature. ThisstudyWas
inpart byaGrant-in-AidfromtheJapanSocietyfor thePromotionof
supported
Science(No. 17405011).
要 約
越智輝雄・近雅博: ラオス産synapsis属の1新種. - ラオスからSynapsis属の1新種を記
載し, synapsissato1spnov.と名付けた. Synapslssatoispnov.はS tridensSHARPに似ているが,
4 前月・板wの前角に つ の歯をもっことによって容易に区別される
Postscript
ThetypedepositoryofCyobiuscheyiOcHI,KoNetKAsHIzAKI,2006,Elytra,Tokyo,34,P・
147.
Holotype: Male, Gomantong, near Sandakan, Sabah, Borneo, 21~23-II-2005, A.
KAsHIzAKIleg. TheholotypeispreservedinthecollectionoftheEntomologySection,Sandakan
ForestResearchCenter,Sepi1ok,Sabah, Malaysia.
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