INVESTIGADORES
CARLINI Alfredo Armando
artículos
Título:
Evolution of the axial skeleton in armadillos (Mammalia,Dasypodidae)
Autor/es:
17- GALLIARI F.C., A.A.CARLINI, M.R.SANCHEZ-VILLAGRA
Revista:
MAMMALIAN BIOLOGY
Editorial:
ELSEVIER GMBH
Referencias:
Año: 2009 vol. 21 p. 1 - 8
ISSN:
1616-5047
Resumen:
Intraspecificandinterspecificvariationincervical,thoracic,andlumbarregionofthevertebralcolumnof
Dasypodidaewereexaminedinaphylogeneticframework.Thenumberofvertebraeforeachregionwererecordedfor
86 specimensandmetricdataforeachvertebra(centrumlength,high,andwidth)wererecordedfor72specimens,
includingeightoftheninelivinggenera.Thenumberofvertebraeanddegreeoffusionbetweenthemwereusedto
definefourcharacterswhichwereplottedontwoalternativephylogeniesofDasypodidae.Theratiobetweencentrum
height andwidthissimilaracrossalltaxaanalyzedexceptfor Chlamyphorus, whichexhibitsadeviationinthelasttwo
lumbars. Tolypeutesmatacus is uniqueamongthetaxaexaminedinhavingasecondco-osifiedbonecalledpostcervical
bone,whichisafusionoftheseventhcervicalandfirstthoracicvertebrae.Thethoraco-lumbarnumbersofdasypodids
are reducedwhencomparedwithotherxenarthransandaremorediversethanthoseofsomeothermammalianclades
of similargeologicalageandhigherecomorphologicaldiversity.Changesinsizearesomewhatcoupledwithchangesin
the numberofbodysegments.Independentofthephylogeneticframeworktaken,changesinsizeareaccompanied
with smallchangesinnumbersofthoracolumbarvertebraewithineachgenus.Therearefunctionalandphylogenetic
correlatesforchangesinnumberofthoraco-lumbarvertebraeindasypodids.
