Fig. 4. Lobopodian Aysheaia pedunculata Walcott, 1911, USNM 365608 in Aysheaia prolata from the Utah Wheeler Formation (Drumian, Cambrian) is a frontal appendage of the radiodontan Stanleycaris

Fig. 4. Lobopodian Aysheaia pedunculata Walcott, 1911, USNM 365608 from the Stephen Formation (Cambrian Series 3, Stage 5), British Columbia, Canada; in cross-polarized light (A), cross-polarized light, red and yellow channels reduced (B).