The oldest described eurypterid: a giant Middle Ordovician (Darriwilian) megalograptid from the Winneshiek Lagerstätte of IowaJames C. Lamsdell, Robert M. McKay, Derek E. G. Briggs et al.|BMC Evolutionary Biology|2015Cited by 69
PRESERVATION OF GIANT ANOMALOCARIDIDS IN SILICA-CHLORITE CONCRETIONS FROM THE EARLY ORDOVICIAN OF MOROCCORobert R. Gaines, Peter Van Roy, Derek E. G. Briggs et al.|Palaios|2012Cited by 46