This is a rare and Original nodule of Tullimosntrum gregarium
Tullimonstrum gregarium is an extinct genus of soft-bodied bilaterian that lived in shallow tropical coastal waters of muddy estuaries during the Pennsylvanian geological period, about 300 million years ago. A single species, T. gregarium, is known.Tullimonstrum have been found only in the Mazon Creek fossil beds of Illinois, United States. Its classification has been the subject of controversy, and interpretations of the fossil likened it to molluscs, arthropods, some type of worms and vertebrates.
we base the model reconstructions on the last publication that described tully like a basal vertebrate, and thus a member of the phylum Chordata.
Mazon Creek Fossil Bed
Francis Creek Shale
McCoy, Victoria E.; Saupe, Erin E.; Lamsdell, James C.; et al. (April 28, 2016). "The 'Tully monster' is a vertebrate". Nature. 532 (7600): 496–499. doi:10.1038/nature16992. PMID 26982721.
Tullimonstrum gregarium original nodule Mazon Creek
nodule size: 7 cm x 4 cm single nodule
restorations: 0 %
this fossils is form a very old collection so no restorations or painted parts!