Philogenia marinasilva spec. nov. from the state of Acre, Brazil (Zygoptera: Megapodagrionidae)

2010·0.8 MB·English

by  Machado, A B M

Odonatologica39(2):149-152 June 1,2010
Philogeniamarinasilva spec. nov.
from thestateof Acre, Brazil
(Zygoptera: Megapodagrionidae)
A.B.M.Machado
DepartamentodeZoologia,InstitutedeCiências Biológicas,
Universidade Federal deMinas Gerais,Avenida AntonioCarlos,6627,Caixa Postal 486,
BR 31270-901, Belo Horizonte,MinasGerais,Brasil; - [email protected]
ReceivedSeptember18,2009/ ReviewedandAcceptedDecember 18,2009
Thenewsp. is described and illustrated froma singlespecimen,representingthe
second unquestionablePhilogeniarecord fromBrazil. Holotype 3: Brazil,state of
Acre,Mancio Lima,11/15-VII-1996;depositedinauthor’s collection. ItisclosetoP.
schmidti.
INTRODUCTION
Philogenia Selys, 1862isagenusofneotropical forestzygopterans,with35spe-
cies, mostofwhichoccur inSouthAmerica.Although surrounded by countries
rich in Philogenia species, Brazilhadso farasingle unquestionable record, i.e.P.
margaritae Selys, 1862, fromTefe, Amazonas(LENCIONI, 2005). Here anew
Brazilianspecies, P. marinasilvasp. n.,isdescribedfromthe stateofAcre.
PHILOGENIA MARINASILVA SP. NOV.
Figures1-2
Material. - Holotype 3: Brazil,State ofAcre,MancioLima (7°21'23-'S/73°40'4T' W),
Terrafirmaforestattheleft bank ofthe Moa river,Dionisio leg.;11/15-VII-1996.
Etymology. - Namedin honorofsenator Marina Silva,theformer MinisterofEn-
vironmentofBrazilinrecognitionforheroutstandingcontribution totheprotectionoftheAmazo-
nianforest,especially thatofthestateofAcre.
MALE(holotype). - Head. - Labiumbrownishexceptformedianlobethatis
black.Baseofmandibles, genae,labrumandanteclypeus yellow,antefronsblack,
upperpartofheadbrownishwithafinetransverse stripebetweentheeyesanda
150 A.B.M.Machado
postocular transverse bandthatare
black. Rearofhead pale.
Thorax. — Prothorax: pro-
notum brown, propleuron black.
Pterothorax:mesepistemumbrown-
ishwithmiddorsalcarinaandanar-
row stripe anterior to humeralsu-
tureblack.Otherpartsofmesopleu-
ron yellowish with 3 black stripes
at the mesepimeron, metepister-
num and metepimeron, respective-
ly. Legs yellow. Wings hyaline with
an apical brown area distalto the
level of pterostigma, broader on
the hindwings. Pterostigma brown.
Venationasdescribedfor thegenus
(CALVERT, 1924).
Abdomen.— SI dorsallyyel-
low,laterally black. S2 dorsolateral-
lyblack withalateralyellow stripe,
ventrally yellow. S3-7 black with a
basalyellowring, S8-10andappend-
Figs 1-2.Philogeniamarinasilva sp.n.,holotype;(1) agesblack.
cerci,lateralview; - (2) same,dorsal view. STRUCTURAL CHARACTERS. -
Hind prothoracic lobe smoothly
rounded.Cercus in lateralview (Fig. 1) 3times longer thanS10, dorsalmargin
smoothly rounded,ventralmargin raiseduntilabout 1/3 of itslength thenslop-
ing ventrally,apexturnedventroanteriorly. Meso-ventralprocesslarge, subtrian-
gular,projecting ventrally morethan thewidthof cerci(Fig. 1). In dorsalview
(Fig. 2) cercus divaricatewithlateral margins slightly concave, medialmargin
strongly concave toaboutthe proximal half,slightly convex at distal half,then
tapering to the apex that is slightly directedlaterad. Paraprocts in lateral view
(Fig. 1)straight tapering intoafine tip,withastrongbasaltuberclealso visible
in dorsalview(Fig. 2).
Measurements (mm). —Hw32.7;abdomen 40.0.
DISCUSSION
Philogenia marinasilvasp. n.belongs to thecassandra species-group. InBICK
& BICK(1988) itkeys out to P. schmidtiRis, fromwhich itdiffersincharacters
shown in TableI, all related to the anal appendages. A comparison with a P.
schmidtispecimen fromBoliviashowsthatthepleuroninthelatteris muchdarker
Phylogeniamarinasilva sp.n. 151
TableI
CharactersseparatingP.marinasilva sp.n.fromP.schmidti
CChhaarraacctteerrss mmaarriinnaassiillvvaa sscchhmmiiddtlii
UUppppeerrmmaarrggiinnooffcceerrccuuss SSmmooootthhllyyccoonnvveexx SSttrraaiigghhttwwiitthh ddiissttaalltthhiirrdd
iinnllaatteerraall vviieeww ccoonnccaavvee
AAppeexxooffcceerrccuussiinnllaatteerraall vviieeww TTuurrnneeddvveennttrroo--aanntteerriioorrllyy SSttrraaiigghhtt
MMeessoo--vveennttrraallpprroocceessssiinn PPrroojjeeccttiinnggvveennttrraallllyyaaddiissttaannccee PPrroojjeeccttiinnggvveennttrraallllyyaaddiissttaannccee
llaatteerraall vviieeww sslliigghhttllyylloonnggeerrtthhaannwwiiddtthh ooff ttwwiicceelloonnggeerrtthhaannwwiiddtthhooff
cceerrccuuss cceerrccuuss
PPaarraapprrooccttssiinnllaatteerraallvviieeww DDiissttaallllyyssttrraaiigghhttwwiitthh aa DDiissttaallllyysslliigghhttllyyuuppccuurrvveeddwwiitthhnnoo
pprroommiinneennttbbaassaallttuubbeerrccllee bbaassaallttuubbeerrccllee
CCeerrccuussiinnddoorrssaallvviieeww OOuutteerrmmaarrggiinnccoonnccaavvee..AAppeexx OOuutteerrmmaarrggiinnccoonnvveexx..AAppeexxbbrrooaadd
ffiinnee,,ddiirreecctteeddllaatteerraadd ddiirreecctteeddmmeeddiiaadd
thanthatinP. marinasilvaholotype. Thisdifferenceismostlikelyontogenetic; as
pointed out by RIS(1918), in P.schmidtithethoracic colouris age-dependent.
P. marinasilvawas collectedinthe northernpartofthe stateofAcreandrepre-
sentsthesecond unquestionable recordofthegenusinBrazil.Thefirstrecordis
thatoftwo P. margaritaSel.males, listed by SELYS(1862).
Thesameauthor(SELYS, 1886) listedalso two P. cassandraSel.malesfromthe
MacLachlancollection,collectedat“Elaut-Amazone:Pebas; Tefe”.Thepossible
significance of the informationon this label, used also in several otherspecies
studiedby Selys,was discussedby MACE1ADO(1985). Theproblem is thatPe-
basis locatedin PeruandTefe inBrazil, bothontheAmazon. Whilethecoun-
tryofprovenanceofthesingle Forcepsioneura ephippigera (Sel.)specimen stud-
iedcannot beidentified, thetwo countries couldbe represented by oneeachof
thetwo P. cassandraspecimens. RACENIS(1959) interpretedthe Selysian 1886
P. cassandrarecordas anindicationthe species occurs in Brazil.TSUDA(2000)
questioned itscountryprovenance,whereasLENCIONI(2005)andHECKMAN
(2008) donot regard P cassandraas a memberoftheBrazilian fauna.
With only two known species, P margarita and P. marinasilva the Brazilian
,
Philogenia fauna ispoor compared to that ofPeru, Colombia, Venezuelaand
Bolivia — allcountrieswithAmazonianForest. Itisreasonabletoexpect, there-
fore,thatmanymoreBraziliancongenersare stilltobediscoveredand described,
particularlysofromtheAmazon Forest.
ACKNOWLEDGEMENT
IamthankingMYRIANMORATODUARTEforthedrawingsillustratingthispaper.
152 A BM. Machado
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