Paleontological and Paleobotanical Museum (Nostimo) teeth of a shark that was 20–25 m long, and a Late Pliocene (3.5 million years old) tooth of an "Anancus arvenensis", a mastodon, an ancient relative of the elephant, which has been recognised here for the first time in the wider area of Western Macedonia. The mastodon which lived in this area was about the same size as a modern elephant, but with longer tusks. Also displayed are some Neolithic tools (from the 4th millennium BC): a fishing weight, and a blade for harvesting crops. Paleontological and Paleobotanical Museum (Nostimo) The Paleontological and Paleobotanical Museum () at Nostimo is
Second voyage of HMS Beagle tooth among the Punta Alta fossils. This discovery was later explained as part of the evolution of the horse. The "soft as cheese" "Mastodon" bones at the Paraná River were identified as two gigantic skeletons of "Mastodon andium", and mastodon teeth were also identified from Santa Fé and the Carcarañá River. The pieces of spine and a hind leg from Port S. Julian which Darwin had thought came from "some large animal, I fancy a Mastodon" gave Owen difficulties, as the creature which he named "Macrauchenia" appeared to be a "gigantic and most extraordinary pachyderm", allied to the "Palaeotherium", but