Eoraptor Lunensis

"Dawn thief", a pair of eoraptors (Paul Sereno,1993) near a water source, late triassic, when "El Valle de la Luna"(Ischigualasto) was a river valley.
The picture, whose composition is clearly diagonal, emphasizes the dominant position of one of the animals. Upper right and left, Neocalamites, a member of the Calamitales plants that belongs to the Sphenophytes, were indicative of humid habitats.

Frenguellisaurus Ischigualastensis

"Frenguelli´s reptile", we can see on guard passive animal, on a bed of ferns, in the Ischigualasto provincial park (San Juan, Argentina), where later the rest of the animal would be discovered.