A new species of the genus Archaeocallirhopalus Legalov (Coleoptera: Curculionidae, Entiminae) in Baltic amber

2015·2.5 MB·

by  Legalov Andrei

©EntomologicaFennica.13May2015
Anew species of the genus Archaeocallirhopalus Legalov
(Coleoptera: Curculionidae, Entiminae) in Baltic amber
AndreiA.Legalov&AndrisBukejs
Legalov, A. A. &Bukejs, A. 2015:Anew speciesofthegenusArchaeocalli-
rhopalus Legalov (Coleoptera: Curculionidae, Entiminae) in Baltic amber. —
Entomol.Fennica26:25–29.
Archaeocallirhopalusalekseevisp.n.isdescribedandillustratedfromtheBaltic
amberofKaliningradRegion,Russia.ThenewspeciesissimilartoA.larssoni
Legalov,2013butdiffersinthesmallerbody,foreheadwithoutstrongtubercles
overtheeyesandanarrowerscape.ThegenusArchaeocallirhopalusLegalov,
2013, placem. n. is transferred from tribe Cneorhinini to the tribe Trachy-
phloeini.
A.A.Legalov,InstituteofSystematicsandEcologyofAnimals,SiberianBranch,
RussianAcademyofSciences,FrunzeStreet,11,Novosibirsk630091,Russia;
Correspondingauthor’se-mail:[email protected]
A.Bukejs,InstituteofSystematicBiology,DaugavpilsUniversity,Vienïbas13,
Daugavpils,LV-5401,Latvia;e-mail:[email protected]
Received14July2014,accepted29October2014
1.Introduction posit probably was produced by Pinus succini-
fera(Goeppert)Conwentz(Schubert1961).Bal-
ThetribeTrachyphloeiniisasmallmonophyletic ticamberfromthisPrussianFormationisdated
groupofsoil-livingweevilswithmorethan500 fromtheUpperEocene(Grigjalisetal.1971),al-
speciesinexcessof20generathatiswidespread though sometimes it is considered older (even
inallbiogeographicalregions(Alonso-Zarazaga Lowermost Eocene) (Weitschat and Wichard
&Lyal1999,Borovec2014).Exceptforanold 2010).
recordofagenusTrachyphloeusGermar,1817in The type specimens belong to the following
Baltic amber (Klebs 1910) (that may be incor- collections:ACAB–privatecollectionofAndris
rectlyidentified),fossilformsofTrachyphloeini Bukejs (Latvia: Daugavpils), and ISEA– Insti-
wereunknownuntilnow. tute of Systematics and Ecology of Animals
Belowwedescribethesecondrepresentative (Russia:Novosibirsk).
of the tribe Trachyphloeini from Upper Eocene Descriptionsandphotographsweretakenus-
Balticamber. ing the Zeiss Stemi 2000-C dissecting stereo-
microscope.
2.Materialandmethods
TheBalticamberminesarelocatedalongtheBal- 3.DescriptionofArchaeocallirhopalus
tic Sea coast at the Amber quarry of Yantarny alekseevisp.n.(Figs.1–5)
near Kaliningrad (formerly Koenigsberg) in the
Kaliningradregion(Russia).Amberfromthisde- Type material. Holotype: no. 022, male, depos-
26 Legalov&Bukejs (cid:127) ENTOMOL.FENNICAVol.26
Fig.1.Lateral(right)viewofArchaeocallirhopalus
alekseevisp.n.(holotype).Scalebar=1mm.
itedinACAB.Paratype:no.BA2012/13,female,
depositedinISEA.
Diagnosis. This new species is similar to
A.larssoniLegalov,2013butdiffersinasmaller Fig.2.LateralviewofheadofArchaeocallirhopalus
alekseevisp.n.(holotype).Scalebar=1mm.
body,foreheadwithoutstrongtuberclesoverthe
eyesandanarrowerscape.
Description.Male.Bodylength(withoutros-
trum)3.3mm;rostrumlength0.5mm.
Body black, with short, wide, very dense,
grey-browncontiguousscales,appearingsilvery
shiny due to the presence of cavities between
specimenandinternalsurfaceofitsimpression.
Head.Rostrumshort,wide,0.8timesaslong
aspronotum,equalinlengthandwidth,withal-
most straight sides, nearly straight, densely
punctate,withtwoweakstriaeformingangleat
base,epistomusalmostbare,pterygiadeveloped;
scrobes visible dorsally, directed toward eyes,
base with weak transverse stria; forehead wide,
weaklyflattened,coarselypunctate,withmedian
stria but without tubercles on either side; eyes
small, rounded, weakly convex; vertex weakly
flattened, punctate; temples short, 0.5 times as
long as eye, punctate; antennae inserted at first
thirdofrostrumlaterally;antennaelong,reaching
elytralhumeri;scape3.7timeslongerthanwidth,
with dense contiguous and sparse decumbent
scales, almost equal in length to flagellum;
antennomeres conical, with dense scales and
sparselongdarksemierectsetae;1stantennomere
2.2timeslongerthanwide,0.2timesaslongand
0.4timesaswideasscape;2ndantennomere2.5
timeslongerthanwide,0.9timesaslongand0.8 Fig.3.DorsalviewofArchaeocallirhopalusalekseevi
timesaswideas1stantennomere;3rdantennomere sp.n.(paratype).Scalebar=1mm.
ENTOMOL.FENNICAVol.26 (cid:127) AnewcurculionidspeciesfromBalticamber 27
Fig.4.Lateral(left)viewofArchaeocallirhopalus
alekseevisp.n.(paratype).Scalebar=1mm.
1.4timeslongerthanwide,0.5timesaslongand
0.9 times as wide as 2nd antennomere; 4th – 6th
antennomeres subequal to 3rd antennomere; 7th
antennomere1.3timeslongerthanwide,almost
equal in length and 1.1 times as long as 6th
antennomere;clubcompact,0.4timesaslongas Fig.5.VentralviewofArchaeocallirhopalusalekseevi
flagellum,1.8timeslongerthanwide,withfused sp.n.(paratype).Scalebar=1mm.
antennomeres,weaklyacuminate.
Pronotum. Pronotum transverse, slightly metacoxa; 3rd and 4th ventrites short, equal in
shorter than elytral base; disk narrowed at apex length; 3rd ventrite 0.4 times as long as 2nd
andatbase,denselypunctate,withweaklongitu- ventrite; 5th ventrite 3.2 times as long as 4th
dinalbarelineandweakocularlobes. ventrite.
Mesonotum.Scutellumreduced. Legs.Legslong,withdense,broadscalesand
Elytra. Elytra weakly elongate and convex, contiguoussparseelongatesetae;femoraweakly
3.6timesaslongaspronotum;greatestwidthbe- clavate,withoutteeth;profemurlength/widthra-
hindmiddle;humericompletelyflattened;punc- tio 2.7; mesofemur length/width ratio 2.9;
turedstriaeregularanddistinct;puncturesoval, metafemurlength/widthratio3.6;trochantercon-
small and dense; intervals weakly convex, 4.0– ical;tibiaealmoststraight,weaklyflattened,wid-
7.0 times as wide as striae, with middle row of ened at apices, with apical dark setose fringe;
shortdecumbentnarrowscales. metatibial corbels closed; protibia length/width
Thorax. Prosternum punctate; precoxal part ratio 4.2; metatibia length/width ratio 5.1; tarsi
ofprosternumweaklyelongate,equalinlengthto long,withthicklighterectsetaedorsally;1stand
procoxalength;procoxalcavitiesround,joined; 2nd tarsomeres triangular; 3rd tarsomere widely
postcoxalpartofprosternumshort,0.4timesas bilobed;5thtarsomereelongate;clawslarge,free,
long as procoxa length; mesocoxal cavities without teeth; mesotarsi: 1st tarsomere barely
rounded,narrowlyseparated;metasternumshort, wider than long; 2nd tarsomere 0.8 times longer
0.4 times as long as metacoxa length, convex, thanwide,0.8timesaslongandwideas1sttarso-
punctate;metepisternumnarrow,barelyvisibile. mere; 3rd tarsomere 0.8 times longer than wide,
Abdomen. Abdomen flattened in middle; 1.4timesaslongand1.3timesaswideas2ndtar-
metaventralprocessaswideastransversediame- somere;5thtarsomere3.6timeslongerthanwide,
ter of metacoxa; 1st and 2nd ventrites elongate, 1.4timesaslongand0.3timesaswideas3rdtar-
equal in length; 1st ventrite 1.2 times as long as somere.
28 Legalov&Bukejs (cid:127) ENTOMOL.FENNICAVol.26
Female. Body length (without rostrum) 3.3 4.Discussion
mm;rostrumlength0.6mm.
Head.Rostrum0.7timesaslongaspronotum, Some representatives of the tribe Cneorhinini
equal in length and width; temples 0.7 times as (particularlywithsmallbodies)aresimilartorep-
longaseye. resentativesofthetribeTrachyphloeiniandtheir
Pronotum. Pronotum 1.4 times longer than taxonomic position is sometimes interpreted in-
wideatapex,0.7timeslongerthanwideinmid- correctly (Zherikhin&Egorov1991).Thetribe
dle,0.8timeslongerthanwideatbase. Trachyphloeiniischaracterizedbyclosedmeta-
Elytra.Elytra3.1timesaslongaspronotum, tibialcorbels,andthetribeCneorhininiischarac-
2.1timeslongerthanwideatapex,1.5timeslon- terizedbyopenmetatibialcorbels(verticallydi-
ger than wide in middle, 2.9 times longer than vided into two parts) as Borovec (2009) noted.
wideatapicalfourth;greatestwidthbehindmid- This character was poorly studied in the genus
dle;intervals4.5–6.7timesaswideasstriae. Archaeocallirhopalus (Legalov 2013). For this
Thorax.Precoxalpartofprosternum0.9times study,metatibialcorbelswereobservedindetail
as long as procoxa length; postcoxal part of intheholotypeofArchaeocallirhopaluslarssoni
prosternum0.6timesaslongasprocoxalength. Legalov, 2013 and the type specimens of A.
Abdomen. 1st and 2nd ventrites weakly con- alekseevisp.n.Weconcludedthatbothspecies
vex,equalinlength;1stventrite1.1timesaslong haveclosedcorbelsonthemetatibiae,andthere-
asmetacoxalength;3rd–5thventritesflattened;3rd fore this genus belongs to the tribe Trachy-
and 4th ventrites equal in length; 3rd ventrite 0.2 phloeini.ThegenusArchaeocallirhopalusdiffers
timesaslongas2ndventrite;5thventrite3.3times from the genus Cathormiocerus Schoenherr,
aslongas4thventrite. 1842byhavingtheanteriormarginoftheprono-
Legs. Profemur length/width ratio 2.7; tum with ocular lobes and the metaventral pro-
mesofemur length/width ratio 3.4; metafemur cess as wide as the transverse diameter of the
length/widthratio3.2;protibialength/widthratio metacoxae.Itcanbedifferentiatedfromthegenus
7.0; mesotibia length/width ratio 7.0; metatibia PseudocneorhinusRoelofs,1873bytheweakoc-
length/width ratio 5.4; mesotarsi: 1st tarsomere ularlobesandfreeclaws. Archaeocallirhopalus
1.6 times longer than wide; 2nd tarsomere 0.7 is habitually similar to the genus Callirhopalus
timeslongerthanwide,0.6timesaslongand1.4 Hochhuth, 1851 (Cneorhinini) but differs in
timesaswideas1sttarsomere;3rdtarsomere0.7 closedmetatibialcorbelsandapronotumwithoc-
timeslongerthanwide,1.4timesaslongand1.4 ularlobes.
timesaswideas2ndtarsomere;5thtarsomere3.0 WeevilsofthesubfamilyEntiminaearequite
timeslongerthanwide,1.7timesaslongand0.4 abundantintheBalticamber.Tenspeciesfrom6
timesaswideas3rdtarsomere;metatarsi:1sttarso- genera of the tribes Polydrusini, Anypotactini,
mere 1.4 times longer than wide; 2nd tarsomere Naupactini,SciaphiliniandTrachyphloeinihave
0.9timeslongerthanwide,0.7timesaslongand been described (Yunakov and Kirejtshuk 2011,
1.1timesaswideas1sttarsomere;3rdtarsomere Legalov 2012, 2013). Entiminae comprise ap-
0.8timeslongerthanwide,1.4timesaslongand proximatelyonethirdoftheBalticamberCurcu-
1.5timesaswideas2ndtarsomere;5thtarsomere lionidae.ThegeneraSitonaGermar,1817(Sito-
3.8timeslongerthanwide,1.5timesaslongand nini)andPhyllobiusGermar,1824(Phyllobiini)
0.3timesaswideas3rdtarsomere. havealsobeenrecorded(Klebs1910).
Type locality and type strata. Amber mines
locatedalongtheBalticSeacoastandYantarny Acknowledgements.TheauthorsthankDr.AlexanderS.
Amber quarry near Kaliningrad (formerly Konstantinov (National Museum of Natural History,
Washington,U.S.A.)forlinguisticsuggestionsfortheear-
Koenigsberg),Kaliningradregion,Russia;Upper
lierversionofthemanuscript,andDr.VitaliiI.Alekseev
Eocene,PrussianFormation.
(Kaliningrad,Russia)forconstructiveadvice.Thestudy
Etymology. The name of this new species is waspartiallysupportedbytheFederalFundamentalScien-
dedicated to our dear colleague, Dr. Vitalii I. tific Research Programme for 2013–2020, Project No.
Alekseev(Kaliningrad,Russia). VI.51.1.7.
ENTOMOL.FENNICAVol.26 (cid:127) AnewcurculionidspeciesfromBalticamber 29
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