The document lists the names of various prehistoric animals from different geologic eras. Some examples include Orthoceras, Anomalocaris, Pterygotus, Cephalaspis from the Paleozoic era. Examples from the Mesozoic era include Hybodus, Dunkleosteus, Stethacanthus, Meganeura, Arthropleura from the Paleozoic era. Examples from the Cenozoic era include Mamut Llanós, Rinoceront Llanós, Lleó de les Cavernes, Megaloceros, Megatheri, Macrauchenia, Megalania, Thylacoleo.