Reference

Sachs, S., Lindgren, J. and Kear, B.P. 2018. Reassessment of the Styxosaurus snowii (Williston, 1890) holotype specimen and its implications for elasmosaurid plesiosaurian interrelationships. Alcheringa: An Australasian Journal of Palaeontology 42, (4), 560-574.