A Revision of the Eubrianacinae (Coleoptera, Psephenidae) : V. Jaechanax gen. nov.

11 Pages·2000·10.8 MB·English

by  Lee, C-F

Elytra,「okyo,28(1):ll9-129,May15,2000
ARevisionoftheEubrianacinae(Coleoptera,Psephenidae)
V, J「aechana:,cgen
nov.
Chi-FengLEE
MuseumofBiologicalDiversity,TheOhioStateUniversity,
1315KinnearRoad,Columbus,OH43212-1192,U.s.A.,
MasatakaSAT0
LaboratoryofNatureConservation,GraduateSchoolofNagoyaWomen'sUniversity,
Mizuho-ku,Nagoya,467-8610Japan
and
Ping-ShihYANG
DepartmentofEntomology,NationalTaiwanUniversity,
Taipei,107Taiwan
Abstract Larva,pupaandadultofJlaechanaxgen nov aredescribed fromthe
OrientalRegion.Twospeciesaredescribedasnewtoscience:Je1ongatusspnov.[Philip_
pines]andJdentatusspnov.[Indonesia:Sulawesi].EubrianaxiffiestM.SAT0,E.inslgnls
FAIRMAIRliand E materPfcaretransferredtoJ,aechana;x.Eubrianax limbatithoraxPfc,
1923 isregardedasajuniorsynonymof E majorPfc,1913. Akeytothespeciesof
Jaechana:x;isprovided.
Introduction
MostspeciesofthesubfamilyEubrianacinaearehithertoknownasbelongingto
thegenusEubriana:x:.Throughourrecentstudyonthesubfamily,wehaverecognized
thatthegenusisacompositegroup.Aboveall,Eubrianaxlnslgnls(FAIRMAIRE)andits
alliedspeciesareapparentlydifferent fromEubriana;x;inoldsenseinhavingthelong
andslightlycurvedclawsandthenarrowlyroundedapicesofparameresofthemale
genitalia.Their immaturestagesalsoshowsomepeculiaritiesandaresimilar tothose
ofthegeneraMubrianaxandOdontanaxl.Thus,wearegoingtoestablishanewgenus
forthisgroupofeubrianacinesinthepresentpaper.
Astheresult,threespeciesofEubrianaxdescribedbyFAIRMAIREandPIc inold
timesshouldbetransferredtothenewgenusandalsotwonewspeciesshouldbede-
scribed inaddition.
120 Chi-FengLEE,MasatakaSAT0andPing-ShihYANG
ACr0ny
MH Museumnationald'Histoirenaturelie,Paris
BP BerniceP.BishopMuseum,Honolulu
FMc FieldMuseumofNaturalHistory,Chicago
NH NaturhistorischesMuseum,Wien
NT NationalTaiwanUniversity,Taipei
NWu NagoyaWomen'sUniversity,Nagoya
Jal'echana:x:gennov.
Typespecies:EubrianaxinslgnisFAIRMAIRE,1904.
Description. Adult. Bodyformoblong,moderatelydepressed;surfacedense-
lypubescentbutmoresparselysoonpronotumwhichisprovidedwithlatero-apical
translucent areas.
Headcompletelyconcealedunderpronotum; fronsapicallydilated;labrumtrans-
verse,mediallyemarginate; antenna11-segmented,segments3-10serrate in female,
pectinateinmalewithallramioriginatingbasally.Maxillarypalpus4-segmented,seg-
ment1veryshortandweaklysclerotized;labialpalpus3-segmente segment1short
andweaklysclerotized.Pronotumtransverse,widest usuallynear basal t/3,slightly
constricted towardsbase,moredistinctlyconstrictedtowards apex; marginsarcuate
andsmooth;posterioranglesrectangular;discmediallyconvex.Scutellumsubtriangu-
1ar.ElytraobovateorsubparalIe1;discwithstripesconsistingofmoreimpressedpunc-
tures; lateral margins smooth. Prosternum produced anteriorly; presternal process
short,not reachingmesosternum,apicallytapering,withacuteapex;mesosternumflat,
without groove for reception ofpresternal process; metasternumwith deeply im-
pressedmedianlongitudinalsuture.Mesocoxa1cavitiesseparated.
Legsmoderatelylong,apicalspinesoftibia2-1-1; tarsi5-segmented,segment1
subequa1tosegment2,progressivelyshortened fromsegment2to4,segment5sub-
equaltosegment2;clawssimple,slightlycurved;pulvillimembranousandtranslucent.
Malegenitalia trilobed; fibulareduced into veryslender sclerite;median lobe
slender,base-lateralapophysesshort;parameres1ong, reachingapexofmedian lobe,
apicesnarrowlyrounded, longerthanbasalpiece;ventralapophyseswelldeveloped;
basalpiecegraduallynarrowedtowardsbase.
Secondarysexualdimorphism:- Femalehasalargerbodyandserrateantennae.
Mature larva(Fig. 1; baseduponanexuviaofJ dentatus). Body formob-
long.Perioce11arsulciconjoinedwithmid-dorsal linenearapex, lackingmid-dorsal
pronota1plate.Posteriorplatespresent inall thoracicsegments(includingpleurites)
and main plates of abdominal segments 1-3. Costal lines present on meso- and
metathoracesandallabdominalsegments,abbreviatednear lateral marginsofmeso-
andmetathoracesandpleuritesofabdominalsegments7-8.Slendercrevicespresent
betweenposteriormarginofabdominaltergite6andanteriormarginoftergite7(ab-
sentinyoungerlarvae).
RevisionofEubrianacinae.V 121
Fig. 1. LarvaofJaechana)cdentatussp nov;dottedareasindicatecrevices
Pleuriteornamentation: - Anteriorandlateralmarginswithlanceolatesetae;pos-
teriormarginswithcomb-shapedsetae.Twoorthreemarginalpegsetaepresentatan-
tore-lateral anglesand becomingprogressivelyshortenedposteriad; thesetaewith
teethonlyonanteriormarginsofbasalpieces;threeorfourmarginalpegsetaepresent
atpostero-latera1anglesandprogressivelylengthened.
Marginalpegsetae(Fig 4)providedwith4or5teethoneachsideofapicalpor-
tion; teethonbothsidesofbasalpiecereduced;basalsetaelanceolate; apicalsetae
pairedande1ongatelylanceolate;apicalpiecefilament-shaped.
Diagnosis. Adult. ThisnewgenusisveryclosetoEubriana:x;,butcanbedis-
tinguished fromthelatterbyacombinationofthefollowingcharacters: longand
slightlycurvedclaws(Fig 2),membranousandtranslucentpulvilli,andthenarrowly
roundedapjcesofparameres. InEubrianax:, theclawsareshort andstronglycurved
(Fig 3), thepulvilli arepigmentedandwelldeve1ope and thehook-likeapicesof
parameresarecoveredwithsmallroundedsclerites.
Larva. verysimilartothatofMubriana:x;,butdifferent fromthelatter in the
absenceofposteriorplatesonpleuritesofabdominalsegments1-4,andthepresence
ofacrevicebetweenabdominalterga6and7.
122 Chi-FengLEE,MasatakaSAT0andPing-ShihYANG
r
Figs.2-3. Tarsalclaw;2,Jaechanaxinslg,fis(FAIRMAIRE);3,EubrianaxmanakikikuseM.SAT0
Fig. 4. MarginalpegsetaeofJalechanax;dentatussp nov.
Fig.5. SpiraclesofthepupaofJaechanaxdentatusspnov.
Pupa(Fig. 5;baseduponanexuviaofJ dentatus). Very similar to that of
Odontana)c,butthespiraclesaredifferent inhaving feweropenings(about15),allof
whichareinamarginalrow,andinbearingsetaebetweenopeningsandaprocessnear
theapexofeachspiracle.
Etymology. NamedafterDr.ManfredA.JAcH.Hehasgreatlycontributedtothe
study ofthePsephenidaeingeneral,andrearedalarvaofJa,echana)cdentatu.s・tothe
adult.
Includedspecies. Ja,echanax:. dentatussp nov., J e1ongatussp nov., J111ies1
(M.SAT0), comb nov.,J inslgnis(FAIRMAIRE),comb nov.,andJ maJ'or(Pfc),comb
nov.
Distributional range. Philippines, Indonesia, Malaysia, Thailand, Laos, Viet-
nam,Myanmar.
RevisionofEubrianacinae.V 123
Jlaiechanax:dentatussp nov.
(Figs.1,4-9)
T eseries. Holotype: (NHMW),“N-SULAWESI1992DuaSaudaraNPW
Batuputih(8) leg.Jach15.N,reared fromlarva”Theexuviaewereused forthede-
scriptionsoflarvaandpupa.Paratypes:1 (NHMW),“INDON.C-Sulawesi45kmSE
Palu 01°ll'S 120°08'E leg. Haft (5) l994”; 1(5 (NTUC), “Rantepao Sulawesi
15.11.1985M. Tao leg”; 1 (NWU),“Pedamaran, 900-1200mNr. Rantepao,Sul.
Set. INDONESIA8th 1985N.Kobayashileg”
Male. 4.2mmlong,2.6mmwide.Colorationdarkbrown;sidesofpronotum
andlegsbrown.Antenna(Fig 9)pectinatefromsegment3to le; relativelengthsof
ramus santennomere from segment 3to le about 3.4:6.2:6.6:6.4: 5.8:5.0:4.2:
4.1.Maxillarypalpus(Fig 8)slender;apexrounded; relativelengthsofsegments2-4
about15:1:1.2. Labialpalpus(Fig 7)short,about 0.5X lengthofmaxillarypalpus;
apex rounded; relativelengthsofsegments2-3about l:1.1.WP/LP=2.0. LE/WE=
1.3.WP/WE=0.6.
Malegenitalia(Fig 6): - Elongate,3.4Xaslongaswide.Penisthelongest,slen-
der, gradually widened towards base; apex rounded; toothednear apex.Parameres
elongate,subequa1to lengthoftegmen,widestat aboutmiddle; apicesrounde(i,di-
rectedoutwards;mesalmarginsgraduallyclosedtowardsbase;ventralapophysescon-
nectedwitheach other, connection very narrow, about 0.03X lengthofparameres.
Basalpiece0.5X lengthoftegmen,mostlycoveredbyparameres,baserounded.
Fjgs.6_g. Jaechanaxdentatussp nov;6,malegenitalia;7,labialpalpus;8,maxillarypalpus;9,male
antenna.
l24 Chi-FengLEE,MasatakaSAT0andPing-ShihYANG
Diagnosis. J,aechana;lcdentatuscanbedistinguishedfromothermembersofthe
genusinhavingshorterparameresandbasalpiece.
Etymology. FromLatindens(tooth)plus-atus(providedwith), indicating its
toothedpenis.
Distribution. Indonesia(Sulawesi).
J‘aechanaxelongatusspnov.
(Figs.10-13)
Typeseries. Holotype: (BPBM),“PHILIPPINESMt.Montalban,Riza1Wa-
waDam, 150-200m l. 111. 1965/L. M. Torrevi11as Collector BISHOP Museum”
Paratypes: l (BPBM),samedataasthepreceding,but“6.111.1965”; I (BPBM),
same data, but “lt.111. 1965”; 2 (BPBM),samedata, but “16.111. 1965”; 1
(BPBM),samedata,but“l8.111.1965”;1 (BPBM),samedata,but“26.111.1965”;
2 (BPBM):“R1.,CAMARINESSUR,Mt.Iriga500m,24.111.1962/H.M.Torre-
villasCollector BISHOP”; l (BPBM):“PHILIPPINESMINDANAOMt.ViewCol-
leges l5kmNW Valencia Bukidon, 22-23. N. '68/D. E. Hardy Collector”; 13
(NTUC): “(PHILIPPINES) Matalangao, 50mN. Palawan Is 30. VIII. 1985 M.
Tomokuni”
Male 4.l-5.4mm long, 2.4-2.8mmwide.Colorationblackishbrown; coxae,
trochanterandfemorasometimespaler.Antenna(Fig. l3)pectinatefromsegment3to
10;relativelengthsoframusvsantennomerefromsegment3toleabout3.5:7.0:7.0:
6.6: 5.4:4.6:4.2:3.7; terminalsegmentnarrowedatmiddle.Maxillarypalpus(Fig.
Fi9s. 10-13. Jaechanax:etc'lgatusspnov;10,malegenitalia;11, labialpalpus;12,maxillarypalpus;
13,maleantenna.
RevisionofEubrianacinae,V l25
12)slender;apexrounded;relativelengthsofsegments2-4about1.3:1:1.1. Labial
palpus(Fig.11)short,about0.4Xlengthofmaxillarypalpus;apexrounded;relative
lengthsofsegments2-3about1:1.7.WP/LP=2.0.LE/WE=1.5.WP/WE=0.7.
Malegenitalia(Fig.10):- Elongate,4.6Xaslongaswide.Penis0.9x lengthof
genitalia,slender,graduallywidenedtowardsbase;apexrounded.Paramereselongate,
0.8Xlengthoftegmen,widestatbasal t/3;apicesrounded;mesalmarginsgradually
narrowedfromapextobasal t/5,emarginateatbasal t/5;ventralapophysesconnected
witheachother,connectingarea0.05Xlengthofparameres.Basalpiece0.5x length
oftegmen,baserounded.
Variation. OnespecimenfromPalawanhasyellowishbrownpronotum.
Diagnosis. Jaliechanax;e1ongatusissimilar toJ dentatus in its longantennae,
butdiffersfromthelatterinthelongaedeagus.
Etymology. FromLatine1ongatus(elongate),indicatingitslongaedeagus.
Distribution. Philippines(Luzon,Mindanao,Palawan).
Jaechanaxilliesi(M.SAT0),combnov.
(Figs.14-l7)
EubrianaxiffiestM.SAT0,1983,65.
Typematerials. Threeparatypes(2 ,1?,inNWU)wereexamine “PHILIP-
PINESMt.Puguis,2000mBontocProv.,LuzonJune,5,6,1977M.Sateleg”
Additional materials ex:;amlned. 1 (NHMW), “PHILIPPINES Sayangan,
2260mBenguetProv.,Luzon10-11.VI. l977,leg.M.Sate”;1 (BPBM),“PHILIP-
PINESIfugaoProvinceJacma1Bunhian 24kmE.Mayoyao,800-1000m,25-27.「V
1967, leg.L.M.Torrevi1las”;1 (NTUC),“(PHILIPPINES)Mt.Pugis1300-1600m
MountainProv. N. Luzon Is 20. VII i985, leg.Y.Nishikawa”;1(; (NWU),“Mt.
Osdung2,250mGoldStarBenguetProv.,Luzon,P.1.28-V-1977Leg.S.Ueno&M.
Sate”
Male. 4.7-5.2mmlong, 2.7-3.0mmwide.Colorationdarkbrownexcept for
twobasal antennalsegments,sidesofpronotum, pro-andmesosterna, trochanters,
coxaeand femorawhichareyellowishbrown.Antenna(Fig.17)pectinate fromseg-
ment3to le;relativelengthsoframusvsantennomere fromsegment3to leabout
2.7:3.9:4.4:4.4:4.0:3.6:3.4:2.8.Maxillarypalpus(Fig.16)slender;apexrounded;
relativelengthsofsegments2-4about18:1:1.5.Labialpalpus(Fig.15)small,0.5X
lengthofmaxillarypalpus;apexobliquelytruncate;relativelengthsofsegments2-3
about1: l.8.WP/LP=1.6.LE/WE=1.4.WP/WE=0.6.
Malegenitalia(Fig.14):- Elongate,3.3Xaslongaswide.Penis0.9Xlengthof
genitalia, very slender, gradually widened towards base; apex rounded. Parameres
elongate,0.8x lengthoftegmen,widestatbasal t/3;apicesangulate;mesalmargins
parallel fromapex tobasal3/8;slightlyemarignateat basal t/8;ventralapophyses
connected witheachother, connecting area0.15X lengthofparameres.Basalpiece
0.5x lengthoftegmen,baserounded.
126 Chi-FengLEE,MasatakaSAT0andPing-ShihYANG
Figs. 14-17. Jaechana)ciltiesi(M.SAT0);14,malegenitalia;15,labialpalpus;16,maxillarypalpus;17
maleantenna.
Female. 6.1mm long, 5.2mm wide. Similar to male in color. WP/LP=1.8.
LE/WE=1.5. WP/WE=0.6.
Variation. Someindividualshaveapicallypaleelytra.
Diagnosis. J,aechana)ci11iesi ischaracterizedbytheangulateapicesofthepara-
meres.
Distribution. Philippines(Luzon).
Jalechanaxinsigms(FAIRMAIRE),comb nov.
(Figs2, l8-21)
Eubriana:x:insignisFAIRMAIRE,1904,87.
T:ypespecz'men. Lectotype: 3(herewithdesignate MHNP),“179,H. Tonkin
Lamay,EubrianaxinsigmsFairm.H.Tonkin”(Numberofsyntypesunknown)
Ad(加iona1materialsexamined. 2 (BPBM),“VIETNAM.M'DrakEofBan
Me Thuot 4-600m, 8-l9. XII 60/C. M. Yoshimoto Collector”; 2 (BPBM),
“VIETNAM:Dalat6kmS., l400-1500m9.VI-7.VII i961/N.R.SpencerCollector
BIHSOP”; I (BPBM), “VIETNAM:Fyan900-1000m, ll.VII-9. VIII. '61”; I
(NHMW),“NLAOS, LuangNamthaenv.,800-1200m,May l997”;2 (NHMW
NTUC),“MYANMARMandalayDivision8kmEPyin00LwinGelaungriverpwe
KaukWaterfall,ca lc70m,5.6.199922°03.52'N96°31.95'E leg.Schuh &Schill-
hammer(63).”
Male. 3.8-5.2mmlong,2.5-3.0mmwide.Coloration dark brown or blackish
brownexcept for palerpro-andmesofemora.Antenna(Fig 21) pectinatefromseg-
RevisionofEubrianacinae,V 127
Fjgs. 18-21. Ja,echanaxinsignis(FAIRMAIRE);18,malegenitalia;19,labialpalpus;20,maxillarypalpus;
21.maleantenna
ment3to le;relativelengthsoframusvsantennomerefromsegment3to10about
2.5:4.5:5.3:5.0:4.0:3.6:3.0:2.5.Maxillarypalpus(Fig 20)slender;apexrounded;
relativelengthsofsegments2-4about14:1:1.5.Labialpalpus(Fig.19)short,about
0.5xlengthofmaxillarypalpus;apexrounded;relativelengthsofsegments2-3about
1:1.5.WP/LP=1.8. LE/WE=1.4.WP/WE=0.7.
Malegenitalia(Fig.18):- Elongate,4.OXaslongaswide.Penis0.8Xlengthof
genitalia,slender,graduallywidenedtowardsbase;apexrounded.Paramereseton9ate,
0.8x lengthoftegmen,widestatbasal t/5;apicesrounded;mesalmarginsgradually
narrowedfromapextobasal t/8,connectedtogethernearbase;ventralapophysessep-
arated.Basalpiece0.5Xlengthoftegmen,baserounded.
Diagnosis. This species can bedistinguished from theother speciesof the
genusbytheseparateventralapophysesoftheparameres.
Distribution. Vietnam,Laos,Myanmar.
Jalechatla;x:mat'or(PIC),combnov.
(Figs22-25)
EubrianaxmaりorPIc,1913,172.
Eubriana);llimbatithoraxPIc,1923,9. Synnov.
Typematertia1. Lectotype: (herewithdesignated, MHNP),“JavaROu9eS, n
sp,Type,TYPE,Eubrianax::maりorPlc.”(Numberofsyntypesunknown・)
(herewithdesignated, MHNP),“J. B.CORPORAAL.
synonym. Lectotype:
sumatras' 0.K.Medan191720M,Type,TYPE,limbatithora:)cn.sp”(Numbe「ofSyn-
typesunknown)
128 Chi-FengLEE,MasatakaSAT0andPing-ShihYANG
Figs 22-25. Jaechana)l;mate,(Pfc);22,malegenitalia;23,labialpalpus;24,maxillarypalpus;25,male
antenna
Additionalmaterialsexamined. 1 (BPBM),“MALAYA:KualaLumpur,Kiang
gates31.XII.1958/L.W.QuateCollector”;1 (BPBM), “THAILANDBana5-10.
l l958/T. C. MaaCollector BISHOP MUS”; l (NHMW),“S-THAIL.,Betong
l993 Gunung Cang dun viii. Yala dist., 25.3-22.4. leg. Horak & Strnad”; 1(5'
(NHMW),“SUMATRA4.4.19972°49'N99°18'EKebunSeiKopas,200mleg.Ma-
1icky”;4 (NHMW,NTUC),“INDONESIA:WJavaPangandaranNat.P50kmSE
Ciamis lg.Schuh13-15. 8. l994”;1 (FMC), “CHICAGO NAT. HIST. MUSEUM
Gurungkotup.,Cetabuto,Mindanao,R1.F.Wernesleg.Jan1-9.1947.1500ft.elevat
light”
Male. 4.9-5.2mmlong,2.8-3.1mmwide.Generalcolorationyellowishbrown;
eyesblack;antennalsegments3-11,tibiaandtarsiblackishbrown;last fourabdomjna1
stomadarkbrown.Antenna(Fig 25)pectinatefromsegment3to le;relativelengths
oframus'vsantennomerefromsegment3to leabout19:3.1:3.4:3.1:3.0:2.6:2.4:
2.2;terminalsegmentnarrowedatmiddle.Maxillarypalpus(Fig 24)slender;terminal
segmentapicallytapering,apexrounded;relativelengthsofsegments2-4about1.3:1
:1.3. Labial palpus (Fig 23) short, about 0.5X length ofmaxillary palpus; apex
rounded; relative lengths of segments 2-3 about 1:1.2. WP/LP=2.0_2.4.
LE/WE=1.3-1.4.WP/WE=0.7.
Malegenitalia(Fig 22):- Elongate,4.2Xaslongaswide.Penis0.8x lengthof
genitalia,slender,graduallywidenedtowardsbase;apexrounded.Paramereselongate,
0.8X lengthoftegmen,widestatbasal t/3;apicesrounded,directedmesally;mesal
margins gradually narrowed towardsbasal 5/32; ventral apophysesconnected with
eachother,connectingarea0.27X lengthofparameres.Basalpiece0.5x length of
tegmen,baserounded.