The creature, named Darwinius masillae by the paper’s authors, lived an estimated 47 million years ago and is the first example of a previously unknown genus of primate. Thanks to @Monica Forghani Forghani Bianchi
Ammonite fossil: These creatures lived between 240 - 65 million years ago, when they became extinct along with the dinosaurs. 'ammonite' (usually lower-case) originates from the Greek Ram-horned god called Ammon. Ammonites belong to a group of predators known as cephalopods, which includes their living relatives the octopus, squid, cuttlefish and nautilus. Ammonites moved by jet propulsion, expelling water through a funnel-like opening to propel themselves in the opposite direction.
Animals of the past : an account of some of the creatures of the ancient world / Frederic A. Lucas ; American Museum of Natural History. (New York: [American Museum Press], 1922) archive.org/details/animalsofpastacc00lucauoft