FAMILY HETERALEPADIDAE NILSSON- CANTELL, 1921 AMENDED

Diagnosis: Monophyletic by molecular analyses. Capitular plates much reduced and often with large part of uncalcified capitulum exposed.

Comment: All contained species are devoid of shell plates, or ( Koleolepas) only cuticular rudiments (Hosie, 2014), but such reduction also evolved convergently within some species of the Poecilasmatidae . Based on DNA data provided by Yamamori & Kato (2020), we include the Koleolepas from the now abandoned Koleolepadidae Hiro, 1933 .

Alepas Rang, 1829 (five species)

Heteralepas Pilsbry, 1907 (25 species)

Koleolepas Stebbing, 1900 (three species)

Paralepas Pilsbry, 1907 (29 species)