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