Fig. 3 in Aysheaia prolata from the Utah Wheeler Formation (Drumian, Cambrian) is a frontal appendage of the radiodontan Stanleycaris

Fig. 3. Comparison between terminal spines and vetral blades of Stanleycaris and oral papillae and lobopodous limbs of Aysheaia. A. Stanleycaris sp., KUMIP 153923 from the Wheeler Formation (Cambrian Series 3, Drumian), Utah, USA; anterior end showing recurved terminal spines (A1), ventral blade (A2). B. Aysheaia pedunculata Walcott, 1911, USNM 189199 from the Stephen Formation (Cambrian Series 3, Stage 5), British Columbia, Canada; anterior end showing anterior appendages and oral papillae. C, D. Stanleycaris hirpex Caron, Gaines, Mángano, Streng, and Daley, 2010 from the Stephen Formation (Cambrian Series 3, Stage 5), British Columbia, Canada. C. ROM 59975 (paratype), ventral blade. D. USNM 83942, trunk section and lobopods. Abbreviation: Pn, podomere n.