Coppold, Murray and Wayne Powell (2006).
A Geoscience Guide to the Burgess Shale, p. 56.
The Burgess Shale Geoscience Foundation, Field, British Columbia.
ISBN 0-9780132-0-4.

Fossils (Smithsonian Handbooks) by David Ward (Page 64)
Ogygopsis in the Paleobiology Database
Coppold, Murray and Wayne Powell (2006). A Geoscience Guide to the Burgess Shale, p. 56. The Burgess Shale Geoscience Foundation, Field, British Columbia. ISBN 0-9780132-0-4.
Fossils (Smithsonian Handbooks) by David Ward (Page 64)
Ogygopsis in the Paleobiology Database
Ogygopsis