Selected features of Notaulax nigroincrustata sp. n. A) Base of crown and thorax, lateral view, B) same, dorso-lateral view, C) same, ventro-lateral view, D) thorax, dorsal view. Scale bars: A–B) 1 mm, C) 1.5 mm, D) 2 mm, Abbreviations: cc) collar chaetiger, df) dorsal flange, vf) ventral flange. A–F) UANL 8139 paratypes.