tully monster

Mon, 04 May 2026 00:00:13 +0000

Tullimonstrum, colloquially known as the Tully monster or sometimes Tully's monster, is an extinct genus of soft-bodied bilaterian marine animal that lived in shallow tropical coastal waters of muddy. Numerous specimens of fossilized Tully monsters have been found since fossil hunter Francis Tully stumbled across the first in the Mazon Creek fossil bed in Illinois in 1955, and they paint. Found by the dozens in the roughly 300-million-year-old rock of Mazon Creek, Illinois, the Tully Monster was a tiny terrorthe largest specimens stretch a little more than a foot long. But they... Enter the Tully monster, a soft-bodied sea creature that swam in the muddy estuaries of whats now Illinois, around 300 million years ago. It was discovered in 1955, by an amateur fossil.