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Invertebrate

Jaekelopterus

Jaekelopterus rhenaniae was a very large eurypterid with formidable grasping chelicerae.

Jaekelopterus rhenaniae was a very large eurypterid with formidable grasping chelicerae. Fossil appendages reveal a striking arthropod that differed greatly from an ordinary scorpion.

Jaekelopterus at a glance

Diet
Carnivore
Its teeth and feeding structures are interpreted as adapted to taking animal prey.
When it lived
Early Devonian
Group
Eurypterida
Sea scorpions

Beyond the game

The real Jaekelopterus

Jaekelopterus rhenaniae was a very large eurypterid with formidable grasping chelicerae. Fossil appendages reveal a striking arthropod that differed greatly from an ordinary scorpion.

The grasping appendages are especially informative parts of its fossil record. Published estimates of its full size depend on comparisons between those preserved structures and other eurypterids.

Fossil discoveries

Alken, Germany · approximate locationGermany · approximate location
Alken, GermanyGermany

Selected fossil records · present-day map

Map references

Paleobiology Database · L. Størmer. 1976. Arthropods from the Lower Devonian (Lower Emsian) of Alken an der Mosel, Germany. Part 5: Myriapoda and additional forms, with general remarks on fauna and problems regarding invasion of land by arthropods. Senckenbergiana Lethaea 57(2/3):87-183 ↗

Paleobiology Database · M. Poschmann and O. E. Tetlie. 2006. On the Emsian (Lower Devonian) arthropods of the Rhenish Slate Mountains: 5. Rare and poorly known eurypterids from Willwerath, Germany. Palaeontologische Zeitschrift 80(4):325-343 ↗

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

Sources & text credits

Explore the references behind this profile.

  1. Braddy et al. 2008 — Giant claw reveals the largest ever arthropod

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

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