Family BALANIDAE Leach, 1817

Balanidae Leach, 1817: 68. - Gray 1825: 104. - Darwin 1854: 33 (part.). - Pilsbry 1916: 48. - Nilsson-Cantel 1921: 306. - Newman and Ross 1976: 59. - Foster 1978: 95. - Buckeridge 1983: 103. - Newman 1996: 503. - Pitombo 2004: 262. - Chan et al. 2009b: 229.

Diagnosis.

Shell with four or six plates; parietes tubiferous; tubes arranged in single uniform row formed between inner and outer lamina, supplementary tubes may form basally; interlaminate figures complex, arborescent; radii solid or tubiferous, more-or-less developed; basis calcareous, commonly tubiferous; caudal appendages absent; penis commonly with basidorsal point.