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Society of America, Inc. & The University of Kansas, pp. 1–85, ISBN 0-8137-3115-1 Fortey, R.A. (1990), "Ontogeny, Hypostome attachment and Trilobite classification"...5 KB (505 words) - 04:15, 23 November 2023- Paleontology. Part O, Revised. Arthropoda 1: Trilobita: Introduction, Order Agnostida & Order Redlichiida, xxiv + 530 p., 309 fig., 1997. ISBN 0-8137-3115-1...7 KB (763 words) - 01:05, 5 September 2024
- Order Redlichiida, xxiv + 530 p., 309 fig., 1997, available here. ISBN 0-8137-3115-1. (Part O, Revised. Arthropoda 1: Trilobita --- additional volumes in...31 KB (2,951 words) - 21:45, 21 August 2024
Society of America, Inc. & The University of Kansas. pp. 161–162. ISBN 0-8137-3115-1. Wikimedia Commons has media related to Walliserops. Earliest combatants...7 KB (657 words) - 05:29, 23 November 2023
