URUGUARY
CERRO LARGO DEPARTMENT
CANADA DE LOS BURROS
MANGRULLO FORMATION
LATE PENNSYLVANIAN
STEM: TETRAPODA GOODRICH, 1930
_____________________________________________________________________________________SUPERCLASS: AMNIOTA HAECKEL, 1866
CLASS: REPTILIA LAURENTI, 1768
SUBCLASS: PARAREPTILIA OLSON 1947
INFRACLASS: INCERTAE SEDIS
ORDER: PROGANOSAURIA BAUR, 1887
Family: MESOSAURIDAE Baur, 1889
Mesosaurus tenuidens
= Mesosaurus brasiliensis