Progomphus marcelae spec. nov. from western Mexico (Anisoptera: Gomphidae)

2007·1.1 MB·English

by  Novelo-Gutiérrez, R

Odonalologica36(1): 79-84 March1,2007
Progomphusmarcelaespec. nov.
fromwestern Mexico
(Anisoptera: Gomphidae)
R.Novelo-Gutiérrez
DepartamentodeEntomología,InstitutedeEcología,A.C.Apartado Postal63
MX-91070 Xalapa,Veracruz, Mexico
[email protected]
ReceivedMay26, 2006/ReviewedandAcceptedJune21, 2006
Thenewsp. isdescribed,illustrated and itsaffinitiesarepointedout.Holotype3:
Mexico,Pinolapa,StateofMichoacan,alt.616m asl, 19°00.524N;103°01.456W,7-
XI-2005;depositedinIEXA,Xalapa.Itappearscloselyrelatedtothepygmaeus-deli-
catus groupofProgomphus,fromwhich itcanbe distinguishedby the shapeofthe
anterior hamuli andepiproctlobes.The 5 andlarvaareunknown.
INTRODUCTION
With67 currently described species, Pwgomphus is the mostspeciose genus
of the NewWorld Gomphidae, although only two species were described in
thepast 15years fromMexico, viz. P. belyshevi BELLE, 1991 andP. amarillus
TENNESSEN, 1992.Whileconducting a briefodonatebiodiversity survey in
theStateof Michoacan, Mexico, I cameacross asmallspecies ofanewPwgom-
phus, bringing the numberof thecurrently known species to68 (BELLE, 1991,
1994;TENNESSEN, 1992;DAIGLE, 1996),ofwhich 10are nowknown from
Mexico(GONZALEZ-SORIANO& NOVELO-GUTIERREZ, 1996).Thenew
species is similarto P.pygmaeusSelys andP. delicatusBelle.
PROGOMPHUSMARCELAE SP. NOV.
Figures 1-3,4a-c,5-6
Material. - Holotype 6:MEXICO;StateofMichoacan,MunicipalityofTepalcatepec,Pi-
nolapa,Rio Pinolapa(616m asl; 19°00.524N;103°01.456W),7-XI-2005,R.Novelo &J.A.Gomez
leg.;depositedinColeccion EntomologicadelInstitutedeEcologia,A.C,Xalapa(IEXA).Paratypes
80 R.Novelo-Gutierrez
(11 (J) samedata;oneparatypetobedepositedinIBUNAM,(Mexico,D.F.),oneparatypeinR.W.
Garrison’spersonalcollection (Sacramento),and oneparatypein IORI(Gainesville),remainder at
IEXA.
Etymology. - Thisspeciesisdedicatedtomywife Marcela forhercontinuous support
and patience.
MALE(holotype). -Head.- Labium creamy pale; eye color in lifeblue-
green;antennae brown, blackbasally. Labrumpale greenon distalhalfandbor-
ders, light brownon basal half; anteclypeus creamy,postclypeus brown except
grayish at sides; antefronsbrown on ventral half, pale greenabove, postfrons
pale green;vertex brown, postocellar ridge concave inthemiddle; a deep furrow
between vertex andocciput; occiput brown(Fig. 1), withashallowconcavity at
Figs 1-4.DetailsofthemorphologyofProgomphusmarcelae sp.n. (Figs l-4a-c)andP.pygmaeus
Selysfromecuador,Napoprov.(Fig.4d-f):(1)head,dorsalview; —(2)pterothorax,colour pattern;
- (3)abdomen,leftlateralview; - (4)hamuli: (a,d)anteriorand posteriorhamuli,ventral view,(b,
e) same,lateral view,(c,0fightanteriorhamulus,anterolateral view.
Pwgomphusmarcelae sp.n. 81
each sideofmidlineandasmall, mound-liketubercleatmiddle, posterior bor-
derblack, widelyconcave, besetwithlongbrownhairs; rearofheadlightbrown
withayellow spotadjacent to posterior marginofcompound eye.
Thorax. - Anteriorandmiddlelobesofprothorax lightbrown, palegreen
at sidesofmiddlelobe, posterior lobeblack. Pterothorax(Fig. 2): mesepistema
brown withgreenstripes; middorsal carina brown, antealarcrest darkbrown;
pale antehumeralstripe wide, widestanteriorly and connectedto mesothoracic
collar, graduallynarrowingto upperendwhichalmostreaches theantealarcrest,
itsinternalmargin isconcave;secondpaleantehumerallacking;first,secondand
thirdpale lateralstripes complete, wide, thefirstand secondstripes ofthesame
widththroughout,connecting eachotherinferiorly,thethirdstripeverywide, oc-
cupying allthemetepimeron;anarrow,spindle-shaped brownstripe oninterpleu-
ral(obsolete) suture,running fromantealarsinusto metaspiracle; amerebrown
lineon metapleural suture;mesokatepisternum lightbrown, metakatepisternum
creamy;sternum pale green.
Wingswithalightyellow tint,notbrownatexterne base; anterioredge ofcos-
tayellow. Venation;Forewings (FW) with 5 1/2paranal cells, areaposterior to
Cu2one cellwideforthefirst3 cellsthenincreasing to2 cellsfora distanceof3
cells,thendecreasingto onecell;firstandfifthantenodalsthickenedinallwings;
antenodalcrossveinsonFW 11/11,onHW 9/9; postnodal crossveinsonFW7/7,
on FIW7/7; basalsubcostal crossveinpresentin all wings; trianglesand subtri-
angles 2-celledinallwings; pterostigma yellowish-brown (more light ventrally),
surmounting 3 cellsinleft wings, 4cellsinrightwings.
Legs: coxae gray; trochanters, internalsurfaces offemora, and basal fourth
ofhindfemoracreamycolored; externalsurfaces offemora, apical0.75ofhind
femora, tibiaeand tarsalclawsreddish-brown; tarsi black; hindtibia0.70the
length ofhindfemur; hindtarsi0.66 thelength ofhindtibia.
Abdomen(Fig. 3). — Segments 1-7brown,withgreenish-yellow markings
as follows;medianandlowersidesof segments1 and2 including auricles, ador-
somedialstripe alongsegment2,atransverse,wide,basalringon3-6, connecting
to middorsalstripe tapering posteriorly (on 6 is amerefineline);a large, trans-
verse, yellow band on7, occupying basal0.40 oftotallength of thatsegment,
extending posteriorly asafinemiddorsalline; segment7also withalateroventral
yellow spot athalf-length. Segment 8 darkbrowndorsally,lightbrownlaterally,
with a subbasal, lateroventral, irregular pale spot,segments 9-10 darkbrown.
Abdominalsegment 1 lacking amidventraltubercle; anteriorhamuli(Figs 4a-
c)withatransverse,subapical emargination; posteriorhamuli(Figs 4a,b) stout,
with4-5black, lowbasoventraltubercles, lightbrownexceptforgrayish basoin-
ternalborder, hookdarkbrownexternally.
Cerci (Fig. 5) darkbrown on basal0.20, remainderpale yellow; basolateral
toothstout, short, 0.08mmlong, setofffrom 8(left cercus) or9(right cercus)
smallerteethon ventralcarinaby a very shallow butwideconcavity; spines at
82 R.Novelo-Gutierrez
tipof cerci black. Inventral view, lobes ofepiproct straight, parallel-sided on
basal0.66,thenabruptlywidenedatapical 0.34, forminga large, stout, internal
branch anda smallerexternalbranch(Fig. 6);epiproct reaching basal 0.68 the
length of cerci.Paraprocts, indorsal view,withanapical, conicaltuberclebear-
ing atuft ofshort,reddish, stiffsetae.
Measurements (mm). - Totallength(incl. cerci)35.0,abdomen 26.0,hind wing19.5,pter-
ostigmaoffore wing2.7,fore tibia 2.2,hind femur3.7,cerci 1.1(measureddorsallyalongthe inter-
nal margin).
FEMALE. — Unknown.
variation IN paratype SERIES. — Some individualsshow amoreextensive
palecolouronhead(e.g.,onlabrum, postclypeusandpostocellartubercles). Two
specimens have the upperendof antehumeralpale stripes slightly extended to
externalside.Five individualshavethebrownstripe oninterpleural(obsolete) su-
turerunning fromantealarsinustometakatepistemum. Inonespecimen thehind
femoraarealmostentirely paleexcepting foranapical-external brownstripe,and
the lateroventralpartofabdominalsegment8present alargespoton basaland
apicalthirds, thecentralthirdislightbrown.Wingvenation:twoindividualshave
5 paranal cellsin leftwings, othertwo have 7 paranal cells; two specimens with
the areaposterior to Cu2onecellwidethroughout; thenodalformula is highly
variable, themostfrequent is(rank in parentheses): antenodalcrossveins inFW
12/12(11-14), in HW9/9(9-12); postnodal crossveinsin FW7/8(7-9), inHW8/8
Figs 5-8. Malecaudal appendages(allsetaeomitted)ofProgomphusmarcelae sp. n. (Figs5-6), P.
pygmaeusSelysfromEcuador,Napoprov.(Fig.7)andP. delicatusBelle,redrawn fromBELLE, 1973
(Fig.8): (5)cerci,dorsolateral view; — (6)caudalappendages;(a)ventral view,(b)internal branch
ofrightepiproctallobe, laterointernal view; — (7-8)epiproct lobes,ventral view (basalpart ofepi-
proctomitted).
Progomphusmarcelae sp.n. 83
(6-9); two individualshave thesubtriangles of HW one-celled, otherthreehave
the trianglesofoneforewingone-celled.
Measurements (mm). —Totallength(incl.cerci)33.8-35.8;abdomen25.0-26.9;hind wing
18.8-19.8;pterostigma2.5-2.S;foretibia 2.2-2.4;hindfemur 3.7-4.0.Cerci 1.1(thislastmeasurement
wastheonly 100%constant).
REMARKS. — Progomphus marcelaemales were captured at ashallow rocky
stream,around 1400honasunny day. They wereperching onsmallrockswhere
thewaterflowisrapid. Noaggressiveinteractionswereobservedandthreeorfour
individualswere seenperching on the samerock at the sametime. The stream
runs intoa wide, smallcanyon. Apparently the flying seasonis restrictedto the
lateautumn;no individualswere seen during occasional collectings from 1998
to 2004, nor during systematic collectings from February 2005 toJanuary 2006,
excepting November2005.
DISCUSSION
Progomphus marcelaebelongs tothepygmaeus-delicatus groupbystature,tho-
racic colourpattern, andby wingvenation.By thewidthandshape oftheante-
humeralpale stripes, and theextentofpale colouron sidesofthorax(cf. WIL-
LIAMSON, 1920, pi. 1, fig. 2) it resembles closely P. pygmaeusratherthan P.
delicatus.In P. delicatus the antehumeralstripes are more wedge-shaped, and
metepimera are mostly obscure (cf. BELLE, 1973, fig. 130). P. marcelaecanbe
easilydifferentiatedfromP.pygmaeusbytheshape oftheaccessory genitalia:the
apical excision ofanteriorhamulusis transverse andshortin P. marcelae(Figs
4a-c), whileinP.pygmaeusitislongitudinal anddeeper (Figs 4d-f).Thebasalin-
ternalmarginoftheposteriorhamulusislargerinP.marcelae(Fig. 4a).Likewise,
ofthethreespecies, P.marcelaeexhibitsmorereducedepiproctallobes(Fig.6a),
whoseapicointernal branchesare clearly more developed inP. delicatus(Fig. 8)
and P.pygmaeus(Fig. 7). Differencesmentionedby BELLE (1973) forP. delica-
tusandP.pygameusmalesapply also to P. delicatusand P.marcelaemales.
ACKNOWLEDGEMENTS
Iamthankful to JOSEA.GOMEZ-ANAYAfor hiscollaboration and companionshipduring
field collecting.Specialthanks aredue toDr R.W.GARRISON forthe loan ofaspecimenofP.
pygmaeus, andforhisconstructivecriticismtothemanuscript.Financial supportwasprovidedbya
CONACYTgrant(43091-Q).
REFERENCES
BELLE,X, 1973. Arevision oftheNew World genus ProgomphusSelys, 1854 (Anisoptera:Gom-
phidae).Odonalologica2(4): 191-308.
BELLE, J.,1991.The ultimateinstarlarvaeoftheCentral Americanspecies ofProgomphusSelys,
84 R.Novelo-Gutierrez
with adescriptionofP.belyshevi spec, nov,from Mexico (Anisoptera:Gomphidae).Odo-
natologica20(1):9-27.
DAIGLE, J.J., 1996. Progomphustennesseni spec.nov. fromtheDominican Republic, WestIndies
(Anisoptera:Gomphidae).Odonatologica25(4):367-370.
GONZALEZ-SORIANO, E.& R,NOVELO-GUTIERREZ, 1996. Odonata.In: J,Llorente,A.N.
Garda&E. Gonzalez,[Eds],Biodiversidad, taxonomiaybiogeografiadeartropodosdeMex-
ico:haciaunasinlesis desuconocimienlo,pp. 147-167,UNAM,Mexico.
TENNESSEN,K.J., 1992.Progomphusamarillusspec.nov.fromeasternMexico(Anisoptera:Gom-
phidae).Odonatologica21(2):247-252.
WILLIAMSON,E.B.. 1920. Resultsofthe UniversityofMichigan-WilliamsonexpeditiontoCo-
lombia 1916-1917,5.NotesonafewspeciesofProgomphus(Odonata).Occ.Pap. Mas.Zool.
Unix. Mich. 77: 1-18,3pi.excl.