A New Species of Nodynus (Coleoptera, Staphylinidae) from China

4 Pages·2002·3.7 MB·English

by  Hayashi, Y

Elyt・ta,Tokyo,30(2):303-306,November22,2002
ANewSpeciesofNodynus(Coleoptera,Staphylinidae)
from China
Yasuhiko HAYAsH1
Suimeidai3-1-73,KawanishiCity,Hyogo,666-0116Japan
Abstract AnewspeciesofthegenusNlodynusisdescribedfromChinaunderthe
nameN.kasaha,・al. ItissimilaringeneralappearancetoN lellcofaselatusLEWIS,butdif-
fersinthemaculationandmicrosculptureoftheelytraaswellasintheconfigurationofthe
malegenitalia.
ThegenusN「odynusC.WATERHOUSEisasmallgenusintheApateticinaeandcon-
sistsofonlyfiveknownspecies.AllbutN.1eしtcofcasclatusLEWISfromJapanaredis-
tributedinSoutheastAsia.RecentlyIwasabletoexaminetwospecimensofNodynus
fromShaanxiProvince,NorthChina.Theyareverysimilar ingeneralappearanceto
N leしtcofasciatus,butareeasilydistinguished fromthelatterbytheelytra1markings.I
amthereforegoingtodescribethemasanewspeciesunderthenameN.kasaharai.
ThespecificnameisdedicatedtothelateMr.SumacKAsAHARA,whowasafa-
mousartistofinsectsandotherlivingthingsandaneagercarabido1ogistinJapan.
I amverygrateful toDr.Shun-IchiUENo,EmeritusCuratoroftheNationalSci-
enceMuseum(Nat.Hist),Tokyo, forhiskindnessincriticallyreadingthemanuscript
ofthispaper.
Nodynuskasaharaispnov.
(Figs.1-3)
Bodyob1ong-subova1,subpara11e1-side rather convexabove,a littleconstricted
betweenprothoraxandelytraandstronglyshiningblack;mouthorganspitchy, genital
segmentsdarkbrownandnailsbrownish;elytrawithatransversereddishyellow fascia
at aboutthemiddleoneachhalf, the fasciaratherwide,triangularlyproducedbefore
andbehindinboth2ndand4thinterstices,onlybehindin6thinterstice,andonlybe-
foreinthe7th,extending fromlateralmargintoparasutura1punctatestria, not reach-
ingsutural spaceand not extending to epipleuron; epipIeurawithout any fasciae.
Length(width):11.0-12.7(4.8-5.l)mm(somewhatshrank).
Headmuchnarrower thanpronotum(19.0:48.0),flattene gentlyconvexandal-
most impunctatemediallybut punctate-foveateonvertex, ratherdenselypuncturedin
lateral,occipital andclypea1areas,thepuncturessmall insideantennal tuberclesand
304 YasuhikoHAYAsH
Fig. 1. HabitusofNodynuskasaha,-aIsp.nov
coarseatsidesandocciput,whollywithveryminuteandsparsepuncturesbutwithout
microsculpture.Antennaemoderateinlength,polishedandlongerthanwideinbasal
fivesegments,5thsegmentnearlyaslongaswide,6thto10thsegmentsstronglytrans-
verse, and lithsubtrapezoida1,alittlenarrower than 10th andslightly longer than
wide, andwith the following relative lengths (widths): 13.0 (6.0):5.5 (4.5):11.0
(5.0):7.0 (5.0):6.5(5.0):5.5 (5.5):6.5(9.0):6.0(10.0):6.0 (11.5):6.0 (11.5):11.5
(10.0)
Pronotumsemicircular,muchwiderthanlong(48.0:28.0),veryslightlynarrower
andmuchshorter thanelytra(48.0:50.0& 28.0:55.0), gentlyconvex,seemingly
prominentatangles;apicalmarginwidelyandratherdeeplyemarginate,narrowlybor-
dered,straightinmiddle,theemarginationahalfaswideaspronotum;lateralmargins
roundlyconvergentanteriad, faintlysinuatebeforebasalanglesandwidely bordered
throughout;basalmarginnotbordered,gentlyemarginatein lateral thirdandbriefly
prominent inmid-thirdwithstraighthindmargin;apicalangleswidelyandbasalones
narrowlyrounded;disccoarsely,sparselyandirregularly puncturedalongapicaland
NewNod、,n1lsfromChina 305
3
Figs.2-3. Nodvnuskasaha,alspnov.Malegenitalia:2,ventralview;3,lateralview
lateralmargins,notmicrosculpturecl,withveryminuteandsparsepunctures, though
thebasebearsonlyafewcoarsepuncturesatabouttheprominence.
Scutellumlingulate,alittleprominentatapex,weaklyconvexandimpunctate.
Elytrasomewhatbarrel-shaped,gentlyarcuateatsides,borderedat lateralmar-
ginsandnarrowlysulcatealongthem,widestjustbehindthemiddle,truncateatapical
margins,1atero-apica1anglesobtuselyrounde innerapicalanglesarcuateandsharply
prominentateach tip;surfacewitheightstriaeofsmallandelongatepunctureson
eachelytron,all reachingnear apicalmargin, inner fivestriaereachingbasebut the
outerthreeendingbehindshoulder; intersticessomewhatconvex,veryminutelyand
sparselypunctatewithweakandverysparselinearmicrosculpture. Epipleuronwith
smallandsparsepuncturesinbasal fourthbuttheremainingpartisveryminutelyand
sparselypunctate.
Abdomenwith7thand8thsegmentsfinelyandsparselypuncture thepunctures
becomingmuch finerneareachapicalmargin,withtransverselinearmicrosculpture;
male8thstemitegentlyarcuateatapicalmargin,withseveralshort,shallowpitsalong
apicalmargin.
Legsthickandrather long; foretibiaeconspicuously thickeneddistad,slightly
sinuatenearbaseinmale,simplycurvedinfemale;mid-andhindtibiaefaintlysinuate
inbasalhalves.
Malegenitalia(Figs 2-3)symmetrical,elongatedsubfusiformandratherstrongly
curved ventrad;peniselongatedsubova1inbasal swelling,whichisnearlyahalfas
306 YasuhikoHAYAsHl
longasthegenitalia, almost whollymembranousondorsum,graduallytapered to-
wardsbluntapex;parameresbilobate,ratherslender,graduallynarrowedapica rela-
tivelyshort,hookedandthinatapex.
Holotype: QinlingMts.(uptot,200m),Xunyangubaenv.,ShaanxiProv.,China,
,
20-V~10-VI-2000.Paratype: ,samedataastheholotype. (Allthetypespecimens
arepreservedinthecollectionoftheOsakaMuseumofNaturalHistory)
Remarks. Thepresentnewspecies isverysimilar ingeneralappearancetoN
1euafasciatusLEWISfromJapan, thoughit iseasilydistinguishablefromthelatteras
follows: inthelatterspecies,theelytrabearwhitishyellow fasciaanddensereticulate
microsculpture,andtheepipleuronbearsalongwhitishyellow fascia,whichiscontin-
uousfromthedorsum,whileinthepresentspecies,theelytrabearreddishyellow fas-
ciaandveryfine,sparseandlinearmicrosculpture,andtheepipleuronisdevoidofany
fascia;intheJapanesespecies,thebasalswellingofthemalegenitaliaistwo-thirdsas
longasthepenis, whilein thepresentnewspecies, thebasal swellingiselongate,
nearlyaslongasthemalegenitalia.
要 約
林 靖彦:中国産シデムシモドキ属の新種. - シデムシモドキ属Nodynusは5種からなる
小さい属で, シラオビシデムシモドキNleucofasciatusを除いた残りは東南アジアから知られ
ている. 最近, 中国産の, シラオビシデムシモドキにきわめてよく似た, 本属の種を調べるこ
とができた. 本種は翅鞘の斑絞の色が橙黄色でその側片に斑紋を欠くことなどで容易に区別で
き, また雄交尾器, 翅鞘の微細印刻の有無などでも容易に区別できることから新種と認め, 昨
年逝去された笠原須磨生氏に献名して記載した.
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