(en) M. R. Smith, T. H. P. Harvey et N. J. Butterfield, « The macro- and microfossil record of the Cambrian priapulid Ottoia », Palaeontology, vol. 58, no 4, , p. 705–721 (DOI10.1111/pala.12168)
(en) D. L. Bruton, « A death assemblage of priapulid worms from the Middle Cambrian Burgess Shale », Lethaia, vol. 34, no 2, , p. 163–167 (DOI10.1080 / 00241160152418456)
(en) Vannier, Jean (août 2009). "The Gut Contents of Ottoia (Priapulida) from the Burgess Shale: Implications for the Reconstruction of Cambrian Food Chains" [1]. In Smith, Martin R.; O'Brien, Lorna J.; Caron, Jean-Bernard. Abstract Volume. International Conference on the Cambrian Explosion (Walcott 2009). Toronto, Ontario, Canada: The Burgess Shale Consortium (published 31 July 2009). (ISBN978-0-9812885-1-2)
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(en) S. Conway Morris et R. A. Robison, « Middle Cambrian priapulids and other soft-bodied fossils from Utah and Spain », University of Kansas Paleontological Contributions, vol. 117, , p. 1–22 (hdl1808/3696, lire en ligne)
(en) S. Conway Morris et R. A. Robison, « Middle Cambrian priapulids and other soft-bodied fossils from Utah and Spain », University of Kansas Paleontological Contributions, vol. 117, , p. 1–22 (hdl1808/3696, lire en ligne)