👉 Wallemiales are a group of extinct mammals from the Mesozoic era, which lived during the Late Cretaceous period (about 65 million years ago). These animals were characterized by their long necks and small brains, as well as their lack of teeth. They had a distinctive skull with flattened snout, making them resemble a whale-like creature. Wallemiales are considered extinct due to the fact that their remains have been lost for millions of years, making it difficult to determine