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doi.org
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(en) James C. Lamsdell, Derek E. G. Briggs, Huaibao P. Liu, Brian J. Witzke et Robert M. McKay, « The oldest described eurypterid: a giant Middle Ordovician (Darriwilian) megalograptid from the Winneshiek Lagerstätte of Iowa », BMC Evolutionary Biology, (DOI10.1186/s12862-015-0443-9, lire en ligne)
(en) JC Lamsdell, DEG Briggs,, HP Liu, BJ Witzke et RM McKay, « The oldest described eurypterid: a giant Middle Ordovician (Darriwilian) megalograptid from the Winneshiek Lagerstätte of Iowa », BMC Evolutionary Biology, vol. 15, no 169, , p. 1-31 (lire en ligne)
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(en) Carol A. Clark, « Fossil Of Giant Sea Scorpion Discovered Near Albuquerque », Los Alamos Daily Post, (lire en ligne)
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(en) West Virginia University, « The fossil detective », Newswise, (lire en ligne)
(en) James C. Lamsdell, Derek E. G. Briggs, Huaibao P. Liu, Brian J. Witzke et Robert M. McKay, « The oldest described eurypterid: a giant Middle Ordovician (Darriwilian) megalograptid from the Winneshiek Lagerstätte of Iowa », BMC Evolutionary Biology, (DOI10.1186/s12862-015-0443-9, lire en ligne)
(en) James Lamsdell, « Redescription of Drepanopterus pentlandicus Laurie 1892, the earliest known mycteropoid (Chelicerata: Eurypterida) from the early Silurian (Llandovery) of the Pentland Hills, Scotland », Earth and Environmental Science Transactions of the Royal Society of Edinburgh, vol. 103, , p. 77–103 (lire en ligne)
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(en) Associated Press in Washington, « Five foot seven and claws out of its head: meet Earth's first big predator », The Guardian, (lire en ligne)
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(en) « James Lamsdell », sur West Virginia University. Department of Geology and Geography. (consulté le )
