H.P. Lovecraft created the Elder Things in his short novel At the Mountains of Madness. They were/are an alien race that colonized the Earth millions of years before Man. Based on human interpretations of their hieroglyphs the Elder Things might have created life on this planet. They might even have evolved humanity as a slave species. While on Earth they co-existed (and warred) with other intelligent alien species. Eventually they fell into decline, eventually becoming almost extinct on this planet.
The Elder Things came from another world. They evolved somewhere, they had a native biosphere. These two critters are attempts to imagine what other creatures might have lived on that home world.