Peruviogomphus bellei spec. nov. from the Amazonian region of Brazil (Anisoptera: Gomphidae)

2005·1.3 MB·English

by  Machado, A B M

Odonatologica34(1):59-63 March 1,2005
Peruviogomphusbellei spec. nov.
from theAmazonianregionofBrazil
(Anisoptera: Gomphidae)
A.B.M.Machado
DepartamentodeZoologia,InstitutedeCiênciasBiológicas,Universidade Federal deMinasGerais,
CaixaPostal486,BR31270-901,BeloHorizonte,MinasGerais,Brazil
ReceivedFebruary19,2004/RevisedandAcceptedAugust 14,2004
Thenewsp. isdescribed and illustrated (holotype 6:Brazil,Amazonas,Tele,1-1958,
A.L.Carvalho leg.,depositedincollection A.B.M.Machado).Byitssize,colourandstruc-
tureoftheanalappendages,P.belleisp.n.isclosest toP. moyobambusKlots, 1944,butit
canbeseparatedmainlybythepresence ofawell-developedexpansiononabdominal seg-
ment8.Itdiffersfromtheother2congenersby thepresence ofadenticulatedareain the
mid-partoftheinnerhindwingmargin.Thesignificanceofthischaracterfor gomphidtax-
onomyisdiscussed.
INTRODUCTION
Created by KLOTS (1944), the genusPeruviogomphus contains two species, P.
moyobambus KLOTS, 1944and P.pearsoni BELLE, 1979a.The higher classifica-
tionofPeruviogomphus is amatterofcontroversy. Placedby ST. QUENTIN(1973),
BELLE(1979b) andDAVIES(1981)intheEpigomphinae, the genuswas removedto
theLindeniinaeby CARLE(1986). Morerecently itwas,placedintheGomphoidinae
by BELLE(1996) who establishedforitthetribe Peruviogomphini (BELLE, 1996).
Specimens ofPeruviogomphus areextremely rare incollections.Since 1944,whenthe
genuswascreated,only3specimenshavebeenrecorded:theholotypesofP. moyobam-
busandP.pearsoni, respectively fromPeruandEcuador,andafemalefrom Serrado
Navio, Brazil,inmycollection.Thelatterremainsunamedalthoughstudiedbymyself,
ST.QUENTIN (1973)andBELLE(1996).We describeandillustratenowP.belleisp.
n.,basedonasinglemalefromTefe,Brazil.
60 A.B.M.Machado
PERUVIOGOMPHUS BELLEI SP.NOV.
Figures 1-5
Material. — Holotype S;Brazil,stateofAmazonas, Tefe,1-1962,A.L.Carvalho leg.;depositedin
A.B.M.Machadocollection,BeloHorizonte.
Etymology.—Thenewspeciesisdedicated
tothememoryofmylatefriendDr Jean Belle
inrecognitionforhisenormouscontributiontothe
knowledgeofneotropicalGomphidae.
MALE(holotype): Head. — Rearof
the headbrownwith nospines. Restof
headoliveexcept forthelateralpartof
the labrum,the genaeand the base of
mandiblesthatare yellowish.Apromi-
nentridgeonIronsandatransverseridge
slightlydilatedbehindeachlateralocel-
lusarepresent. Occipital crestridged.
Thorax. — Prothoraxlargely olive
brown,darkeratthemargin ofthepos-
teriorlobe.Pterothorax- Mesoepister-
numwith thedarkandpale areas about
equalinsize(Fig.1).Mesoepimeron and
metapleurapale.
Legs (anterior pair missing): femora
brownish-yellow, thelongest spines on
theouteranteriormarginofthirdfemora
abouta quarter thediameteroffemur;
tibiaebrownish yellowventrally,darker
dorsally;tarsiandclawsblack. Spineson
theouteranteriorrowofthirdtibiaeand
tarsislightly modified.
Wings hyaline. Pterostigma yellow-
ish brown. Venationblack. Antenodals
inforewing(FW) 17;inhindwing(HW)
12-13.PostnodalsinFWandHW 10-11.
DiscoidalfieldinFW starting withtwo
rowsof cellsforadistanceof 1-2 cells
followedby asingle row ofcells.That
ofFTWwithtwocellsagainsttrianglefol-
Figs 1-2.Peruviogomphusbelleisp.n.,holotype 6:
lowedbyonerow.Basalsubcostalcross-
(1) diagramofcolourpatternofpterothoracicdorsum;
vein present.Anal areawithonerow of — (2)base ofhindwing(thearrowpointstothe den-
cellsinFW, andtwo rows inHW. Sec- ticulatedarea).
Peruviogomphusbellei sp. n. 61
ond reinforced antenodal in
FW 6th; inHW 5th. One cu-
bito-analcrossvein inFWand
HW. Triangles inFW free, in
FTW free or crossed (Fig. 2).
Supratriangles crossedinboth
wings.Fourparanaland2post-
analcells(Fig. 2).Pterostigma
surmounting2 1/3cellsinboth
FW and HW. Anal triangle
with4cells(Fig. 2). Mid-part
ofthe innerHW marginwith
small denticlessituatedclose
together(Fig. 2).
Abdomen.— Segments
1-2laterally yellowish,dorsal-
lybrownwithyellowspoton2.
Segments 3-6laterallybrown,
dorsallydark;7-10dorsallyred-
dish brown.A middorsalyel-
lowline on 3-7 and a yellow
rectangular lateralspoton the Figs3-5. Peruviogomphusbellei sp. n.,holotype3: (3)last ab-
anteriorthird of4-7.Append- dominalsegments withtheana!appendages,lateralview; —(4)
ages darkbrown. tenthabdominalsegmentandanalappendages,dorsalview; —(5)
Structuralcharacters. — Ac- distalparts ofanal appendages,posteriorview.
cessorygenitaliasimilartothatofP.moyobambus as illustratedby KLOTS(1944).Seg-
ments8-9withlateraldilatations(Fig. 3),thatofsegment8large,theoneof9very small.
Superior analappendages taperinginto along fine-tipped process (Figs 3-4), directed
inwardandupward. Atits distallAtheappendages havea ventro-lateralprocess (Figs
3-4). Inferiorappendage reaching toaleveldistaltotheventro-lateralprocess(Figs 3-
-4),visibleindorsalview(Fig.4) with3smallteethattheapex.Inposteriorview (Fig.
5) thesuperiorappendages show asmalltubercle.Thetipoftheinferiorappendage fits
betweenthistubercleandtheventro-lateralprocess (Fig. 5).
Measurements (inmm).—Abdomen31.4;hindwings25.3;costal sideofpterostigma3.0.
DISCUSSION
ThemaincharactersseparatingthethreeknownspeciesofPeruviogompus areshown
in TableI.By itssizeandstructureoftheanalappendages P.belleisp.n.iscloser toP.
moyobambus. However,itcanbereadily distinguishedfromitbythepresenceoflateral
expansions ontheeighth andninthabdominalsegments.AuniquecharacterofP. bel-
leiis thepresenceofa denticulatedarea attheinnermarginof thehindwings.Anarea
62 A.B.M.Machado
TableI
Maincharactersseparatingtheknown speciesofPeruviogomphus
CChhaarraacctteerrss PP..bbeelllleeii PP..mmooyyoobbaammbhuuss PP..ppeeaarrssoonnii
PPtteerrootthhoorraacciicc ddoorrssuumm WWiitthhttwwooppaalleessttrriippeess WWiitthhoonneeppaalleessttrriippee WWiitthhoonneeppaalleessttrriippee
MMeettaapplleeuurraa PPaalleewwiitthhnnooddiissttiinncctt PPaalleewwiitthhnnooddiissttiinncctt DDaarrkkbbrroowwnnwwiitthh33ddiissttiinncctt
ssttrriippee ssttrriippee ppaalleessttrriippeess
LLaatteerraalleexxppaannssiioonnoonn PPrreesseenntt AAbbsseenntt PPrreesseenntt
aabbddoommiinnaallsseeggmmeenntt 88
AAppeexx oofftthhee iinnffeerriioorraannaall
aappppeennddaaggee RReeaacchhiinnggttooaalleevveell ddiissttaallRReeaacchhiinnggttooaalleevveell RReeaacchhiinnggttooaalleevveellmmuucchh
ttootthheevveennttrroo--llaatteerraall sslliigghhttllyypprrooxxiimmaallttoo pprrooxxiimmaallttootthhee
pprroocceessssoofftthheessuuppeerriioorr tthheevveennttrroo--llaatteerraall vveennttrroo--llaatteerraall pprroocceessss ooff
aappppeennddaaggeessaannddvviissiibbllee pprroocceessssoofftthhee tthheessuuppeerriioorraappppeennddaaggee
iinnddoorrssaall vviieeww ssuuppeerriioorraappppeennddaaggeess aannddnnoottvviissiibblleeiinn
aannddnnoottvviissiibblleeiinn ddoorrssaallvviieeww
ddoorrssaallvviieeww
AAppeexx oofftthheessuuppeerriioorr TTaappeerriinnggiinnttooaalloonngg TTaappeerriinnggiinnttooaalloonngg BBlluunntt--ttiippppeeddaanndd ddiirreecctteedd
aappppeennddaaggeess ffiinnee--ttiippppeeddpprroocceessss ffiinnee--ttiippppeeddpprroocceessss mmeeddiiaallllyy
ddiirreecctteedduuppwwaarrddssaanndd ddiirreecctteedduuppwwaarrddss
mmeeddiiaallllyy aannddmmeeddiiaallllyy
PPoossttaannaallcceellllssiinnHHWW 22 33 33
CCeellllssiinnaannaallttrriiaannggllee 44 33 33
AAnnaallaarreeaaiinnHHWW WWiitthhttwwoorroowwss ooffcceellllss WWiitthh33rroowwssooffcceellllss WWiitthh33rroowwssooffcceellllss
MMiidd--ppaarrttoofftthheeiinnnneerr DDeennttiiccuullaatteedd NNoottddeennttiiccuullaatteedd NNoottddeennttiiccuullaatteedd
mmaarrggiinnooffHHWW
LLeennggtthhooffaabbddoommeenn 3311..44 3333 3366
LLeennggtthhooffHHWW 2255..33 2244..53 2288
likethatwas lookedforin93gomphid species in my collectionbelonging to24genera
as follows.Agriogomphus (2 species), Aphylla (9),Archaegomphus (4), Cacoides(1),
Ceratogomphus (1), Crenigomphus {1),Davidius(1),Desmogomphus (1),Diaphlebia
(2),Epigomphus (2), Erpetogomphus (2),Gomphidia (1), Gomphoides (1), Gomphus
(6),Ictinogomphus (2), Melanocacus(1), Neogomphus (1), Neurogomphus (1), Para-
gomphus (1),Peruviogomphus (1),Phyllogomphoids (12),Phyllocycla (15),Progom-
phus (20),andZonophora (5). Itwasshownthatthepatternofdenticulationoftheinner
hindwingmargin is uniforminthesamespecies andvariableamongthespecies, thus
beingaspecific characterthat,asfaras Iknow,had notyetbeenusedingomphidtax-
onomy.In55% ofthespecies examinedthereare no denticles oronly afewscattered
throughout. Denticles could notbefoundalsoin anundescribedcretaceous gomphid
wing. Groups ofclose together denticlesrestricted to the margin near theanal angle
werefoundinallspeciesexaminedofCrenogomphus, Ictinogomphus andZonophora.
InallspeciesofGomphus,Epigomphus andDiaphlebia thedenticlesoccurredonly in
theposteriorhalfoftheinnerwing marginandweremoreseparated fromoneanother
thanthosenowdescribedinPeruviogomphus. In 1 speciesofAphylla and2ofPhyllo-
cyclathey occurredimmediately anteriortothetomalcell.Apattern as nowdescribed
Peruviogomphusbelleisp.n. 63
for P.belleiin whichthe denticlesare restricted tothe mid-partof theinnermargin
was foundonly inthe Desmogomphus andPrpgomphus whereitoccurred inallspe-
ciesexamined,except P.auropictusandP.perithemoides. The functionalsignificance
of thesedenticulatedareas isunknownbuttheycouldperhapsberelatedtothemating
process. P.belleiis slightlysmallerthantheundeterminedfemalefromSerradoNavio,
Amapa, inmycollectionstudiedby ST.QUENTIN(1973) andBELLE (1996). Itdif-
fers fromitalsoby havingwellmarkedmesepistemal stripes whichare lacking inthe
femalefromSerradoNavio.Thisfemalemostprobably belongs toafourthspeciesof
Peruviogomphus thatwillremainunnameduntil morematerialfromAmapa is found.
Thefinding of athird species oftheremarkable genusPeruviogomphus corroborates
theviewofBELLE(1979)abouttheuniqueness ofthegenus,forwhichhecreatedthe
tribePeruviogomphini.
ACKNOWLEDGEMENT
IthankMYRIANMORATO DUARTEforthedrawingsthatillustratethispaper.
REFERENCES
BELLE, J.,1979a.AnewspeciesofPeruviogomphusKlots, 1944,fromEcuador(Anisoptera:Gomphidae).
Odonatologica8(2): 111-114.
BELLE, J.,1979b. AnattemptatthesubfamilyclassificationoftheGomphidae,basedonsomenewinter-
pretationsofwingvenation(Anisoptera).Odonatologica8(1):43-46.
BELLE, J.,1996.Higherclassification oftheSouthAmerican Gomphidae(Odonata).Zool Meded.Leiden
70(21):297-324.
CARLE,F.L., 1986.Theclassification phytogenyandbiogeographyoftheGomphidae(Anisoptera).I.Clas-
sification.Odonatologica15(3):275-326.
DAVIES,D.A.L., 1981.Asynopsisoftheextant generaoftheOdonata.RapidCommunsSoc.int.Odona-
tol.3: 1-59.
KLOTS,E.B., 1944.Notes ontheGomphinae(Odonata)with descriptionsofnewspecies. Am.Mus. No-
v..i.t.. 1259;1-10.
ST.QUENTIN, D., 1973.Die GomphidenfaunaSudamerikas(Ordn. Odonata).Anninnaturh.Mus. Wien
IT.335-363.