FIGURE 2. Ogygopsis klotzi specimens from the Stephen Formation with thoracic abnormalities. A, C: Ogygopsis klotzi showing truncation of the first four pleural spines of the right thoracic pleural lobe (TMP.1983.142.0002). A: Complete specimen. C: Close up of truncation of the right pleural spines. Note the 'L'-shaped injury formed by 1st–3rd thoracic segments (white arrows), and the more notable truncation of the 4th segment (black arrow). B, D: Ogygopsis klotzi with an abnormality on the right pleural lobe that impacts the 4th–7th pleural spines (TMP. 1983.257.0001). B: Complete specimen. D: Close up of abnormality on the right pleural spines, showing pinching of the 5th and 6th segments (white arrows) and warping of the 4th and 7th segments (black arrows).

Published as part of Bicknell, Russell D. C. & Holland, Brayden, 2020, Injured trilobites within a collection of dinosaurs: Using the Royal Tyrrell Museum of Palaeontology to document Cambrian predation, pp. 1-11 in Palaeontologia Electronica (a33) 23 (2) on page 4, DOI: 10.26879/1087, http://zenodo.org/record/12708470