FIGURE 2. Ogygopsis klotzi specimens from the Stephen Formation with thoracic abnormalities. A, C in Injured trilobites within a collection of dinosaurs: Using the Royal Tyrrell Museum of Palaeontology to document Cambrian predation

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).