The oldest described eurypterid: a giant Middle Ordovician (Darriwilian) megalograptid from the Winneshiek Lagerstätte of IowaJames C. Lamsdell, Robert M. McKay, Huaibao P. Liu et al.|BMC Evolutionary Biology|2015Cited by 69
A new Ordovician arthropod from the Winneshiek Lagerstätte of Iowa (USA) reveals the ground plan of eurypterids and chasmataspididsJames C. Lamsdell, Robert M. McKay, Derek E. G. Briggs et al.|Die Naturwissenschaften|2015Cited by 43