URUGUAY
GUICHON
GUICHON FORMATION
CENOMANIAN STAGE
UPPERMIDDLE GALLIC SUBEPOCH
LOWERMOST GULF EPOCH
MIDDLE CRETACEOUS
STEM: TETRAPODA GOODRICH, 1930
SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: DIAPSIDA
SUPERLEGION: NEODIAPSIDA BENTON, 1985
LEGION: ARCHOSAUROMORPHA HUENE, 1946
SUPERCOHORT: CRUROTARSI SERENO & ARCUCCI, 1990
COHORT: CROCODYLOTARSI BENTON & CLARK, 1988
MAGNORDER: SUCHIA KREBS, 1974
SUPERORDER: CROCODYLOMORPHA WALKER, 1968
GRANDORDER: CROCODILIFORMES HAY, 1930
MICRORDER: MESOEUROCROCODYLIA WHETSTONE & WHYBROW, 1983
ORDER: MESOSUCHIA EMEND HUXLEY, 1875
PARVORDER: METASUCHIA BENTON & CLARK, 1988
GONDWANASUCHIA DE SOUZA CARVALHO, RIBEIRO & DOS SANTOS AVILLA, 2004
NOTOSUCHIMORPHA DE SOUZA CARVALHO, RIBEIRO & DOS SANTOS AVILLA, 2004
NOTOSUCHIFORMES DE SOUZA CARVALHO, RIBEIRO & DOS SANTOS AVILLA, 2004
Family: URUGUAYSUCHIDAE Gasparini, 1971
*Uruguaysuchus aznaresi
*Uruguaysuchus terrai