Membranobalanus porphyrophilus sp. nov. parietes A holotype (WAM C66803) B–J paratype (SAMA C12708) K paratype (SAMA C12706). A Whole shell lateral view B whole shell lateral view C, D rostrum, external and internal view E, F left lateral plate, external, and internal view G, H left carinolateral, external and internal view I, J carina external and internal view K internal view of articulated right carina, carinolateral and lateral plates. Scale bars: 5 mm (A–J); 2 mm (K).