NMNH Gambierdiscus pacificus type specimen

Description:

Figs. 11-14. Scanning electron micrographs of Gambierdiscus pacificus (HO-91), sp. nov., and Gambierdiscus belizeanus. Figs. 11-13. Gambler discus pacificus, sp. nov. Fig. 11, 12. Cells are round to ellipsoid. The Cell surface is smooth with scattered small pores. Fig. 11. Epithecal view. The Po plate is oriented ventrally. Fig. 12. The Ip plate, short and narrow, occupies 20% of the hypotheca width. Postcingular plates 2'" and 4'" are wide. Fig. 13. The Po plate is four-sided plate with a narrow fish-hook-shaped apical opening surrounded by 31 pores. Fig. 14. Gambierdiscus belizeanus. Cell in hypothecal view. The cell surface is areolated. The Ip plate, narrow and pentagonal, is wedged between very wide postcingular plates 2'", and 4'". The cingulum, deeply excavated, is ascending into a deep sulcal hollow. EMu: Gambierdiscus pacificus Holotype SEM negative # 241006; SEM stub # 241; Field # HO-91; Catalog # 1528; Figure #11.