Selected features of Notaulax californica (Treadwell, 1906). A) Peristomium, frontal view, crown removed, B) base of radiolar crown, lateral view, C) radiolar crown with arrows pointed to eye bands, D) radiolar ocelli of largest specimen, E) radiolar ocelli of smallest specimen, F) radiolar tips, G) dorsal lip, H) pygidial eyes, I) thorax and base of radiolar crown, dorsal view, J) same, lateral view. Scale bars: A) 0.5 mm, B–C) 1 mm, D–E) 0.15 mm, F, H) 0.2 mm, G) 0.75 mm, I–J) 0.5 mm. Abbreviations: d) dorsal, df) dorsal flange, fl) flanges, m) mouth, v) ventral. A–J) UANL 8135.