Fig. 4
From: First report of paired ventral endites in a hurdiid radiodont
Ursulinacaris grallae appendages from the Mount Cap Formation, Northwest Territories, Canada. a and b GSC 140185. c and f GSC 135494a. d and g GSC 140186a. e and h GSC 140184. Abbreviations: aux, auxiliary spine; ds, dorsal spine; en, endite; pd, podomere. Scale bars = 5 mm