Representative linear semicircular canal measurements taken on the 3-D reconstruction of the left inner ear of Notostylops murinus. Measurements on anterior semicircular canal shown in (A) and measurements on lateral semicircular canal shown in (B). ASC, anterior semicircular canal; ASCL, anterior semicircular canal length; ASCW, anterior semicircular canal width; LSC, lateral semicircular canal; LSCL, lateral semicircular canal length; LSCW, lateral semicircular canal width; PSC, posterior semicircular canal.