Tropidoturris planilirata is a species of sea snail, a marine gastropod mollusk in the family Borsoniidae. Description The size of the biconic shell attains 16.8 mm. Characteristical for this species is the fact that the shell has no axial ribs. The broad spiral lirae are close and flattened. The shoulder cord is very weak. Distribution This marine species occurs off KwaZulu-Natal, South Africa References . Steyn, D.G. & Lussi, M. (1998) Marine Shells of South Africa. An Illustrated Collector’s Guide to Beached Shells. Ekogilde Publishers, Hartebeespoort, South Africa, ii + 264 pp. page(s): 156 External links Endemic fauna of South Africa planilirata Gastropods described in 1986