No insertion plates; girdle narrow.
Lepidopleurus Risso, 1826:
Apophyses minute and separated.
Leptochiton Gray, 1847:
Valves subcarinated, slightly rounded on their anterior margin; end valves of equal width; apophyses subtriangular.
Parachiton Thiele, 1909:
Posterior valve much larger than the anterior one.
