loading . . . Mazon Monday #314: Happy 60th Birthday, Tully Monster! Happy 60th Birthday to the Tully Monster! Well, actually tomorrow is the day. And, I guess technically it's really been 307 - 309 million years, but who's really counting. Eugene Richardson, Jr., who first called it “Mr. Tully’s monster”, described the animal in the paper "Pennsylvanian invertebrates of the Mazon Creek Area, Illinois: the morphology and affinities of Tullimonstrum", which was published on March 24th, 1966 in the journal Fieldiana. https://esconi.org/2026/03/mazon-monday-314-happy-60th-birthday-tully-monster/?utm_source=bluesky&utm_medium=jetpack_social