Amphibalanus variegatus (Darwin, 1854) (MZB Cru Cir 014-1) a upper view b lower view c side view d external view of scutum and tergum e internal view of scutum and tergum f cirrus I g cirrus II h cirrus III i cirrus IV j cirrus V k cirrus VI l maxilla m maxillule n mandible o labrum p penis. Scale bars: 3 mm (a–c); 1 mm (d–h); 2 mm (i–k); 2 mm (p); 0.5 mm (l–o).