†family Megalograptidae Caster and Kjellesvig-Waering 1955 (eurypterid)
Parent taxon: Carcinosomatoidea according to J. C. Lamsdell 2025
See also Dunlop et al. 2020 and Størmer 1955
Sister taxa: Carcinosomatidae, Lanarkopteridae, Mixopteridae
Subtaxa: Echinognathus Megalograptus Pentecopterus
Type: Megalograptus
Ecology: nektobenthic carnivore
Distribution: