Table Of ContentElytra,Tokyo,35(1):111-ll8,May30,2007
TwoNewSpeciesoftheGenusPlateros(Coleoptera, Lycidae,
Platerodinae) from theRyukyu Islands,Southwest Japan
KiyoshiMATsUDA
DepartmentofHumanandEnviromenta1Sciences,OsakaShin-AiCollege,
6-2-28Tsurumi,Tsurumi-ku. 0saka,538-0053Japan
Abstract Twonewlycidbeetles.Platerossato1sp novandP teruhisaisp nov
aredescribedfromAmami-0shimaandKume-jimaIslands,KagoshimaandOkinawa
Prefectures, theRyukyuIslands,SouthwestJapan. Akeytotheknownspeciesof the
genusPlaterosoccurringintheRyukyuIslandsisgiven.
TheRyukyufaunaoftheLycidaehasbeenstudiedbyNAKANE(1961,1969,1985),
SAT0&0HBAYASHI (1968),CHOJ0&SAT0(1970),MATSUDA(1985,1992)andSAT0
& MATsUDA (1985). Eleven speciesof thegenusPlaterosBOURGEOIS, 1879have
hithertobeen recorded fromthearchipelago.
Recently, theauthor hadanopportunitytoexamineatotalof58specimensof
PlateroscollectedonAmami-0shimaandKume-jimaIslands. Astheresultofcareful
taxonomicexamination, hefoundtwonewPlaterosspeciesamongthem.
In thepresentpaper,thesetwonewspecies,Platerossato1andP teruhisai, willbe
describedwithshort taxonomicnotesandetymology. Thispaper isdedicatedtothe
memoryofthelateDr.MasatakaSAT0,whocontributedtotheclarificationofthelycid
faunaoftheRyukyu Islands.
Platerossatoisp nov.
(Figs.1-6)
M ale. Body blackish brown, shining, with mandibles and claws yellowish
brown; head, pronotum, scutellum and legs black to dark reddish brown, shining;
antennae black to blackish brown except for segment 2 somewhat reddish; elytra
uniformly red.
Bodysurfacecloselyclothedwithshort, recumbent,yellowishbrownpubescence;
head,pronotumandscutellumcloselyclothedwithshort,recumbent,blackishtoreddish
brown pubescence; antennae closely clothed with short, suberect, blackish to dark
reddishbrownhairs;elytraratherdenselyclothedwithshort, recumbent,carminered
pubescence.
Headmostlyconcealedunder pronotum, finelyandmoderatelypunctured; frons
short,stronglydeflexed,slightly roundedin front, withashort narrowlongitudinal
112 KiyoshiMATsUDA
2
f
4
Figs.1-6. Platerossatotsp nov.,(f, fromMt.Yuwan-dake,Amami-0shimaIs.,KagoshimaPref.,
Ryukyu Islands,SouthwestJapan. - 1, Antenna;2, headandpronotum;3,maxilla;4, labial
palpus;5,malegenitalia,a, lateralview;b,ventralview;6, terminalabdominalsegments.Scale
for i 2.5.6:0.5mm:Scale for3.4:0.25mm
groovebetweenfrontaltubercles,whicharenotstronglyswollenjustbehindantennal
insertions;vertexwithadistinctimpressionincentralportion,whichbearsseveralsmall
pores.
Eyes relativelysmall, lateral, hemispherica11yprominent; distancebetweeneyes
about l3timesaswideasthediameterofaneye.
Antennae rather short, barely reaching basal third of elytra; segment 1 stout,
strongly swollenat apex;segment 2 cylindrical, about two-thirds as longas wide;
segment3triangular,aboutaslongastheapicalwidth;segments4tolestronglyserrate
andgraduallydecreasinginwidth;segment11fusiform;relativelengthsfromsegments
1to ll: - 0.8:0.4:1.0:1.4:1.4:1.5:1.4:1.4:1.5:1.4:2.0.
Maxillarypalpiwithterminalsegmentelongate,securiform,about19timesaslong
aswide,about2.7timesaslongas3. Labialpalpiwithterminalsegmentsubtriangular,
about 12timesaslongaswide.
NewPlate(cid:2),os fromtheRyukyu Islands 113
Prothorax transverse, semicircular, about 0.7 timesas long as thebasal width;
anteriormarginwidelyarched;anteriorangleswidely rounded; lateralmarginsslightly
divergingposteriorly; posterioranglessharplyprojectinglatero-obliquely;basalmargin
bisinuate; sides widely reflexed; discsmooth, convex, obliquely grooved from each
anteriorcorner tothemiddleofbasal fourth,deeplyandtriangularlyimpressedateach
insideof anterior andposterior corners, finelyandmoderately punctured on central
portion, coarselypunctured alongante-lateralmargins,providedwithashort narrow
longitudinal carina in front and a lanceolate1ongitudina1 foveabefore themiddleof
basalmargin.
Scutellum subquadrate with apex transversely truncated; surfaceminutely and
rather closelypunctured.
Elytrasubpara11e1-sided,slightlydivergingposteriorly,dehiscentbehindbasal two-
fifthsandseparatelyroundedat apices,about3.1timesaslongaswide,about5.1times
aslongasprothorax, eachhaving fourdistinctprimarycostae, the intervalseachwith
doublerowsof largeroundand irregular cells.
Ventralsurfacerugose, finelyandcloselypunctured; abdominalsternite7roundly
emarginateat apex;analsternitesubtriangular, graduallynarrowed toapex.
Posterior tibiaeslender,slightlydilatedtowardsapices,slightlyshorter thanposte-
riorfemora;posteriortarsiwithsegments1to4subequa1inlength;segment5distinctly
longer than4;clawssimple,somewhatangulateatbase.
Malegenitaliarathershort;median1obelanceolate,withadistinctspinebeforethe
middle;basalpiecesmall.
Fema1e. Eyes relativelysmall, weaklyprominent; distancebetweeneyes15-
1.6timesaslongasthediameterof aneye.
Antennaeweaklyserrate, ratherrobust,notreachingthemiddleofelytra;segment
3about 0.9timesas longaswide;relativelengths fromsegments1to ll: - 1.1:0.5:
1.0:1.3: 1.2:1.5: 1.5: 1.5: 1.5: 1.2: 1.5.
Length:5.2-6.7mm; width:1.4-1.8mm.
Mt. Yuwan-dake, Amami-0shima Is., Kagoshima
Typeseries. Holotype:
,
Pref.,RyukyuIslands,SouthwestJapan,28~30-VI-1992,K.KINUGUSAlgt.
Paratypes:29-Q-,Hatsun0,Amami-0shimaIs.,6-VI-1973,T.HATAYAMAlgt;1(cid:1),
Yamato-son, Amami-0shimaIs., 3-V-1976,T.NIIsAT01gt; 1(cid:1), Mt. Yuwan-dake,
Amami-0shimaIs.,19-VI-l980,S. IMAsAKAlgt;1(cid:1),Chuo-rindo,Amami-0shimaIs.,
18-VI-1980,S.IMAsAKAlgt. TheholotypeisdepositedinthecollectionoftheNational
ScienceMuseum (Nat. Hist),Tokyo.
Etymology. NamedinhonorofthelateDr.MasatakaSAT0,NagoyaCity,Japan,
whowasaprominentspecialistofJapaneseandSoutheastAsianCantharoidea.
Notes. ThisnewspeciesresemblesPnakachiiNAKANEfromOkinawaIs.,Japan,
incoloration,butdiffersinhavingweaklyserrateantennaandintheshapeofaedeagus.
ll4 KiyoshiMATsUDA
Platerosteruhisaisp
no v
(Figs7-12)
Male. Bodydarkreddishbrown,shining,withmandiblesandfemorasomewhat
lighter; headblack,shining; pronotumandscutellum orange red, shining; antennae
blackishbrownexceptforsegment2darkreddishbrown;clawsyellowishbrown;elytra
uniformlyred.
Body surface, head and legs closely clothed withshort, recumbent, reddish to
yellowish brown pubescence; antennae closely clothed with long, suberect, reddish
brown hairs; pronotum, scutellumandelytradensely clothed withshort, recumbent,
carmineredpubescence.
Headmostlyconcealedunderpronotum,finelyandcloselypunctured; fronsshort,
stronglyde?exed, ratherslightly roundedin front,withashort distinct longitudinal
groovebetween frontaltubercles,whicharenotstronglyswollen,justbehindantennal
insertions;vertexwithadistinctV-shapedimpression incentral portion.
Eyesverylarge,lateral,hemispherica11yprominent;distancebetweeneyesabout0.7
timesaswideasthediameterofaneye.
Antennae long, fully reaching themiddleof elytra;segment 1 stout, strongly
swollenat apex;segment2short,cylindrical,aboutone-thirdaslongaswide;segment
3triangular,slightlyshorterthantheapicalwidth;segments4to lestronglyserrate;the
fifthantennalbranchthelongest,thefifthtotheeighthaboutaslongasoralittleshorter
thaneachsegment;segment1l fusiform; relativelengthsofsegments1to ll: - 1.1:
0.2: 1.0: 1.4: 1.4:1.5: 1.5 :1.5:1.4:1.4: 2.2.
Maxillarypalpiwith terminalsegmentsecuriform,about 14timesaslongaswide,
about2.0timesaslongas3. Labialpalpiwithterminalsegment triangular,about17
timesaslongaswide.
Prothoraxtransverse,subpentagonal, about0.8timesaslongasthebasalwidth;
anterioranglesobtuselyrounded; lateralmarginsslightlysinuateatmiddleandweakly
diverging posterioly; posterior angles strongly and triangularly projecting latero-
posteriorly;basalmarginbisinuate;sideswidelyre?exed;discsmooth,convex,obliquely
groovedfromeachanteriorcornertothemiddleofbasalthird,providedwithashort
narrowlongitudinalcarinainfrontandanovallongitudinal foveabeforethemiddleof
basalmargin.
Scutellum subquadratewithapex transversely truncated; surfaceminutelyand
moderatelypunctured.
Elytrasubpara11e1-sided,slightlydivergingposteriorly,dehiscentbehindthebasal
fifthandseparatelyroundedatapices,about3.1timesaslongaswide,about4.6times
aslongasprothorax,eachhavingfourdistinctprimarycostaeandfiveweaksecondary
costae,theintervalseachwitharowof roundorsubquadratecells.
Ventralsurfacerugose,finelyandcloselypunctured;abdominalsternite7roundly
emarginateatapex;analsternitesubtriangular,long,graduallynarrowedtoapex.
Posterior tibiaeslender,slightlydilatedtowardsapices,ahalflengthlonger than
116 KiyoshiMATsUDA
posterior femora; posterior tarsiwithsegments1to4subequa1in length;segment5
distinctlylonger than4;clawssimple, clearlyangulateat base.
Malegenitalialong;medianlobeflattenedandtwistedinapicalhalf,withthedistal
portionsuddenlynarrowed toapex;basalpiecesmall.
Femaleunknown.
Length:7.2mm;width:1.8mm.
Typeseries. Holotype: Mt. Darumayama, Kume-jima Is., Okinawa Pref.,
,
RyukyuIslands,SouthwestJapan,9-VI-1994,T.UENolgt. Theholotypeisdeposited
intheDepartmentofZoology,NationalScienceMuseum(Nat.Hist ),Tokyo.
Etymology. NamedinhonorofMr.TeruhisaUENo,FukuokaCity,Japan,whois
anexcellentspecialist ontheCucujuoidea.
Notes. ThisnewspeciesresemblesPlater'osigneusCHOJ0etSAT0incoloration,
butdiffersin theshapeofaedeagus.
Key totheSpeciesoftheGenusPlaterosOccurringin the
Ryukyu Islands - males
1(14) Elytraredor yellow.
2(7) Prothraxentirelyblacktoblackishbrown
3(4) Aedeagus1ong,medianlobestronglycoiledinapicalhalf. Okinawa Is
P nakachii NAKANE
4(5) Aedeagusshort,median lobenotcoiledinapicalhalf.
5(6) Eyeslarge,distancebetweeneyesabout0.7timesaswideasthediameterofan
eye.Ishigaki Is.,Taketomi Is and IriomoteIs
P yaeyamanusCHOJ0etSAT0
6(5) Eyessmall,distancebetweeneyesabout1.3timesaswideasthediameterofan
eye.Amami-0shimaIs P. satoisp nov
7(2) Prothorax neither black nor blackish brown.
8(11) Pronotumuniformlyred.
9(10) Median lobestrongly coiled in apical half. Ishigaki Is. Taketomi Is and
Iriomote Is. p. iguniusCHOJ0etSAT0
.
10(9) Medianlobenearlystraight,flattenedandtwistedinapicalhalf. Kume-jimaIs
P teruhisaisp nov
11( 8) Pronotumredor yellow,usuallybearingabasalblackspot or twolateralblack
stripes.
12(13) Pronotumred,withadisca11argespotinmedianportion. Amami-0shimaIs.
p miv?alSAT0et OHBAYASHI
13(12) Pronotumyellow,withtwolongitudinalblackstripesinmedianportion. Hon-
shu, Kyushu, Tsushima Is., Ryukyu Islands; China, Korea, Taiwan, India
and Indochina p.planatuSWATERHOUSE
14(1) Elytrauniformlyblack
NewPlaterosfromtheRyukyuIslands 117
15(18) Marginsofpronotumreddishtoyellowishbrown
16(17) Antennalsegment4about2.1timesaslongas3. IshigakiIs andIriomoteIs
P rufotmarginatusCHOJ0etSAT0
17(16) Antennalsegment4about l.3timesaslongas3. Amami-0shimaIs
P. zkarfanus NAKANE
18(15) Pronotumentirelyblack toblackishbrown.
19(22) Lateralmarginsofpronotumgraduallydivergent backwards
20(21) Eyeslarge,distancebetweeneyesabout0.5timesaswideasthediameterofan
eye;medianlobetwistedatapex. Amami-0shimaIs andOkinawaIs___
P. shirakii NAKANE
21(20) Eye relatively small, distance between eyesabout 14 times as wide as the
diameter of an eye; median lobestraight, gradually narrowed to apex.
Ishigaki Is and IriomoteIs pl imasakai MATsUDA
22(19) Lateralmarginsofpronotumsubparalle1orslightlyconstrictedat themiddle;
aedeagus1ong,medianlobeslender,ellipticallywidenedinapicalthird,with
apairofshortspinejust at thebaseof thedilation.
23(24) Antennal segment 3about as longaswide; distancebetweeneyesabout 0.8
timesaswideasthediameterofaneye.Amami-0shimaIs
P. shfbatal NAKANE
24(23) Antennalsegment3distinctlylongerthanwide;distancebetweeneyesabout0.6
timesaswideasthediameterofaneye.IriomoteIs
P. sakishimana NAKANE
Acknowledgements
TheauthorwishestoexpresshissinceregratitudetoDr.Shun-lobiU(cid:27)NOof the
Department of Zoology, National Science Museum (Nat. Hist ), Tokyo and Dr.
TatsuyaNIIsATo,PresidentoftheJapaneseSocietyofColeoptero1ogy, fortheircritical
readingofthemanuscriptandgivingmanyinvaluablecomments.
Theauthor would likealso to thank the lateDr. MasatakaSAT0, Nagoya and
Messrs. Kenichi EMoTo, Tokyo, Itsuro KAwAsHIMA, Kanagawa, Takeichiro
HATAYAMA,Osaka,SyoichiIMAsAKA,FukuokaandTeruhisaUEN0,Fukuoka,Japan,
for theirofferingmaterials for thisstudy.
(cid:36) (cid:33)
(cid:20)(cid:26) (cid:23):(cid:5)(cid:35)(cid:39)(cid:13)(cid:25)(cid:76)(cid:74)(cid:78)(cid:72)(cid:82)(cid:12)(cid:59)2(cid:16)(cid:31). - (cid:10)(cid:34)(cid:9)(cid:13)(cid:56)(cid:69)(cid:43)(cid:32)(cid:13)(cid:25)(cid:59)(cid:22)(cid:19)(cid:58)(cid:8)(cid:53)(cid:48),(cid:61)(cid:75)
(cid:78)(cid:72)(cid:82)(cid:30)(cid:76)(cid:74)(cid:78)(cid:72)(cid:82)(cid:12)Plateros(cid:59)2(cid:16)(cid:31), (cid:70)(cid:73)(cid:68)(cid:76)(cid:74)(cid:77)(cid:72)(cid:82)Platerossatoispnov.(cid:56)(cid:69)(cid:80)(cid:71)(cid:79)(cid:76)(cid:74)
(cid:78)(cid:72)(cid:82)pteruhisaispnov.(cid:67)(cid:38)(cid:41)(cid:50)(cid:52). (cid:49)(cid:66)(cid:62)(cid:55)(cid:5)(cid:35)(cid:39)(cid:13)(cid:46)(cid:64)(cid:60), (cid:17)(cid:29)(cid:31)(cid:59)(cid:76)(cid:74)(cid:78)(cid:72)(cid:82)(cid:47)11(cid:31)(cid:29)
(cid:64)(cid:66)(cid:54)(cid:48)(cid:52)(cid:47), (cid:1)(cid:38)2(cid:16)(cid:31)(cid:60), (cid:49)(cid:66)(cid:64)(cid:59)(cid:44)(cid:51)(cid:66)(cid:59)(cid:21)(cid:56)(cid:63)1lf(cid:2)(cid:11)(cid:7)(cid:59)(cid:14)(cid:15)(cid:55)1(cid:81)1:(cid:42)(cid:58)(cid:4)(cid:3)(cid:55)(cid:48)(cid:65).
(cid:57)(cid:45), (cid:10)(cid:34)(cid:9)(cid:13)(cid:25)(cid:59)(cid:16)(cid:31)(cid:59)(cid:76)(cid:74)(cid:77)(cid:72)(cid:82)(cid:59)(cid:31)(cid:6)(cid:60), (cid:5)(cid:35)(cid:39)(cid:13)(cid:59)(cid:61)(cid:75)(cid:77)(cid:72)(cid:82)(cid:28)(cid:59)(cid:37)(cid:18)(cid:58)(cid:9)(cid:48)(cid:44)(cid:40)(cid:24)
ll8 KiyoshiMATsuDA
(cid:25)(cid:18)(cid:24), (cid:12)(cid:8) (cid:3)(cid:18)(cid:24)(cid:20)(cid:11)(cid:2)(cid:16)(cid:13)(cid:15)(cid:7)t (cid:6)(cid:22)(cid:5)(cid:9)(cid:23)(cid:10)(cid:25)(cid:17)(cid:19)(cid:21)(cid:14)(cid:4)(cid:19)(cid:20)
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