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Museu deZnologia da Universidade de Sáo Paulo
Volume 5l (3) 229-47, 20ll
Axnrourn
wwv¡.mz.usp.br/publicacoes
http://portal.revistasusp.sibi.usp.br
www.scielo.br/paz
ISSN impresso:0031-1049
ISSN on-Iine: l8O7 -O2O5
E
CoMpARADAE MoRFOMETRIAnn OueOnyZo*tvS NIGRIPES
No Rlo Gnnxonoo Sut, Bn¡srr
O. rt¿wscn¡'ts(RooBNnn,Srcn¿oooNrINen)
Lrox¡noo E Mncnnoor'3
RosrRTAPenrsqun2
U. Csrusroppr'a
ATExANDRE
ABSTRACT
andO. nigripesarewidelydistributedand sympanycin manybiomes.
Oligoryzomsflavescens
theseare not clearlye*ablished.In thisstudyd'evripusedto recognize
Thediagnosticcharacters
tion and comparisonwasconductedof externalmorpholog,anatomyof theskull, teeth,postcranial sheleton,as well asstoruachand penis morphology.Statisticalanalysiswasgeneratedfom
of 208 specimens
rrtorphomaricdata. Thesampleconsisted
fom 24 localitiesin Brazil. O. nigripeswasfound to be krger, with dnrsalpelagedarkerand uentralpelagewhitish with bkch
O. flavescensis smalbr with
theshull beinglargerand morerobustthan O. flavescens.
specks,
dorsalpekgeandyellowishbelly.Thepaxern of cephaliccirculationisdtriuedfrom
slightlycl.earer
in
CornparisonofpostcranialsheletonreueabproTninentaccid.ents
thesecondtypein bothspecies.
numerous
On theotherhandO. nigripesdem.onstrated
scapulaand bumerusin O. flavescens.
in
dffirenceslocalizedin the iliac blade,orientationof the ischiumand prominentaccid¿nts
of bothtaxahad thesameunihcular-hemighnduhr
tibia andfibuk. Thestomachmorphology
pattern. Thepenis clnsistedof distal baculumni-digited. Analysisof the discriminantfunction
Accordingto
by thespecies.
groupsrepresented
clearlyindicatesthedistinctionof two homogeneous
t tesr,two morphometicuariables(width of thezigomaticphte and width offirst uppermolar)
are irreleuant(P > 0.05) to thediscriminationof taxa. Sexualdimorphismbasedon morphomeny wassupportedby t testfor O. nigripes.1z O. flavescensthis conditionwasnot su?Ported'.
Krv'woRDs: Okgoryzomys; Description;Anatomy; Morphometry.
INTRODUQÁO
Os roedoresformam o grupo com maior diversidadede espéciesna ClasseMammalia, sendo a
subfamília Sigmodontinaeo clado mais diverso da
família Cricetiade presentenos limites da América
Neotropical(MusserEc Carleton,2005). Dentre os
sigmodontineos,Oryzomyini é a tribo com maior riqueza,contandocom 28 génerosreconhecidos(Musser & Carleton, 2005; \leksler et al., 2006) e tendo
1' Departamento de Biologia, Museu de CiénciasNaturais, UniversidadeLuterana do Brasil (ULBRA). Rua Faroupilha, 101, SáoJosé,
92420-900, Canoas,RS, Brasii.
2. Departamento de Ciéncias da SaúdeBiológicase Agrárias, Centro Universi¡ário No¡te do Espírito Santo, UniversidadeFederaldo
Espírito Santo. 29933-415,SáoMateus,ES, Brasil.E-mail: robertaparesquepceunes.ufes.br
3' E-mail: [email protected]
a' E-mail: auchristgulbra.br