English: Figure 6. Comparative morphology of Pahvantia hastata. (a–c), P. hastata KUMIP 314089; (a), the part showing distal ends of broken endites to the left of the gill blades; (b) part and counterpart superposed to show the nearly complete appendage partly overlying the gill blades, lower inset showing complete counterpart with carapace elements, upper inset showing a close-up of partial appendage and gills on counterpart; (c) counterpart superposed on line drawing of part; (d) appendage of Hurdia for comparison, ROMIP 59259; (e–h), disarticulated Hurdia assemblages, showing groups of connected gill blades associated with other body parts; (e,f), ROMIP 60031; (g,h), ROMIP 60041. Scale bars: (a–c) = 2 mm; (b); upper inset, 5 mm; lower inset, 10 mm; (d–h) = 10 mm. Ds, dorsal spine; Ot, Ottoia prolifica; PEn, peduncular endite, other abbreviations see figures 1 and 3. (a–c) Images courtesy Rudy Lerosey-Aubril.