Argus Panoptes
In the early 1980s, a tiny fossil was extracted from the Montceau-les-Mines Lagerstätte deposit in Eastern France. The fossil went unstudied for more than 30 years before paleontologist Russell Garwood used X-ray computed tomography (CT scans) to investigate the fossil. In 2014, a team led by Garwood identified the specimen as a novel species, "Hastocularis argus", named for the 100-eyed giant Argus Panoptes in Greek mythology. According to their analysis, the specimen died, and was rapidly buried approximately 305 million years ago. Before it decayed, its body was surrounded by the mineral siderite, which formed a protective concretion. The specimen subsequently decayed, leaving a void showing a detailed outline of the creature.