footprint Argentina 20 Tetrapoda 16 ichnology 16 Dinosauria 14 tetrapod 14 trackway 14 South America 12 Tetrapod footprints 12 Triassic 12 Therapsida 10 fossil record 10 Mammalia 8 dinosaur 8 trace fossil 8 Late Triassic 6 Scoyenia 6 morphology 6 taphonomy 6 Caviomorpha 4 Cuyana 4 Dicroidium 4 Dinomyidae 4 Gondwana 4 Invertebrata 4 Los Menucos 4 Miocene 4 Palaeophycus tubularis 4 Patagonia 4 Permian 4