GondwanaResearch10(2006)370–378
/locate/gr
GRLetter
Adamantinasuchusnavae:AnewGondwananCrocodylomorpha
(Mesoeucrocodylia)fromtheLateCretaceousofBrazil
PedroHenriqueNobre,IsmardeSouzaCarvalho?
UniversidadeFederaldoRiodeJaneiro,DepartamentodeGeologia,CCMN/IGEO,21.949-900CidadeUniversitária,
IlhadoFund?o,RiodeJaneiro,RJ,Brazil
Received15July2005;accepted30May2006
Availableonline8August2006
Abstract
AnewLateCretaceousMesoeucrocodylianfromtheAdamantinaFormation(BauruBasin),S?oPauloState,Brazilisdescribed.Themain
featuresofthisnewspeciesaretheshort,highoreinirostralrostrum,thelargelaterallypositionedorbitalnotchesandexternalnaresinthe
anteriormostportionoftherostrum.Themandibleisrobustandconcave-shapedinrelationtotheskull.Thedentitionishighlyspecialized,with
twoprominentincisiformteeth,ahypertrophiedcaniniform,andsevenmolariformteeth.Themolariformteethareornamentedwithdenticlesin
theirlingualsurfaceandaresmoothontheirlabialsurface.Themolariformsareellipticalincross-section,presentingthelargestaxisinthelabial-
lingualdirection.SuchdentalcharacteristicsareuniqueamongtheterrestrialcrocodylomorphsoftheGondwana.
?2006InternationalAssociationforGondwanaResearch.PublishedbyElsevierB.V.Allrightsreserved.
Keywords:Crocodylomorpha;Adamant