†FAMILY TETRACLITIDAE GRUVEL, 1903 (EOCENE–RECENT)

Diagnosis: Wall of six or four plates; parietes tubiferous or solid, permeated by chitin, or have one or more rows of tubes containing living tissue or secondarily filled with calcareous and chitinous material; radii well developed or obsolete; basis commonly membranous; first three pairs of cirri are modified as maxillipeds.

Comment: Results of both multiple marker phylogenetic analyses by Tsang et al. (2014) and Chan et al. (2017a) and mitogenome phylogenetic analyses Shen et al. (2017) and Cai et al. (2018) in Tetraclitidae, showed that the subfamilies Tetraclitinae, Tetraclitellinae, Newmanellinae and Epopella Ross, 1970 are clustered in the same clade. The genus Epopella (previously identified as Austrobalanidae) and all the three subfamilies above are grouped under Tetraclitidae .

Astroclita Ren & Liu, 1979 (one species)

† Epopella Ross, 1970 (Miocene–Recent) (six species)

Lissaclita Gomez-Daglio & Van Syoc, 2006 (one species)

Neonrosella Jones, 2010 (one species)

Newmanella Ross, 1969 (one species)

† Tesseroplax Ross, 1969 (one species)

† Tesseropora Pilsbry, 1916 (Miocene–Recent) (eight species)

† Tetraclita Schumacher, 1817 (Miocene–Recent) (18 species)

† Tetraclitella Hiro, 1939 (Miocene–Recent) (16 species)

Yamaguchiella Ross & Perreault, 1999 (one species)