Grunowago pacifica sp. nov. A–D LM of specimens from GU44BJ-4 (A–C) and GU44Z-15 (D) D, E holotype specimen F–H frustule in girdle view, showing isopolar frustule wider in the middle and three girdle bands (GU44BJ-4) I external view of pole and advalvar surface of valvocopula, the latter showing a short row of small pores on the apical part of the pars interior (arrowhead) and the crenulated edge of the pars interior (arrow) J internal view of pole and abvalvar surface of valvocopula. Scale bars: 50 µm (A–D, F); 10 µm (E, G–J).