Eurypterida

Full reference: M. Poschmann and O. E. Tetlie. 2004. On the Emsian (Early Devonian) arthropods of the Rhenish Slate Mountains: 4. The eurypteridsAlkenopterus andVinetopterus n. gen. (Arthropoda: Chelicerata). Senckenbergiana lethaea 84(1-2):173-193

Parent taxon: Eurypterina according to J. C. Lamsdell 2025

Sister taxa: Diploperculata, Dolichopteroidea, Eurypteroidea, Megalograptoidea, Moselopteroidea, Onychopterelloidea, Wiedopterus

Subtaxa: Alkenopteridae

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Ecology: nektobenthic carnivore

Distribution: found only at Alken #3, Nellen Koepfchen Beds, Germany (Devonian of Germany)

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