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Enigmatic animal

Tullimonstrum

Tullimonstrum gregarium had a soft body, stalked eyes and a long front appendage.

Tullimonstrum gregarium had a soft body, stalked eyes and a long front appendage. The Tully monster combines features that have made it one of the most debated fossil animals.

Tullimonstrum at a glance

Diet
Diet uncertain
When it lived
Carboniferous
Group
Animalia
Enigmatic fossil animals

Beyond the game

The real Tullimonstrum

Tullimonstrum gregarium had a soft body, stalked eyes and a long front appendage. The Tully monster combines features that have made it one of the most debated fossil animals.

Its relationship to vertebrates and other animal groups remains contested. The distinctive body outline is clearer than its exact position in the evolutionary tree.

Fossil discoveries

Illinois, United States · approximate location
Illinois, United States

Selected fossil records · present-day map

Map references

Paleobiology Database · F. R. Schram. 1973. Pseudocoelomates and a nemertine from the Illinois Pennsylvanian. Journal of Paleontology 47:985-989 ↗

Map: Natural Earth, public domain. Fossil records: Paleobiology Database and linked collections and publications.

Sources & text credits

Explore the references behind this profile.

  1. Mikami et al. 2023 — Three-dimensional anatomy of the Tully monster casts doubt on its presumed vertebrate affinities

Original English Dinosgacha educational summaries informed by the linked scientific and museum references; source publications retain their own rights.

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