FIGURES 87–90 in Examination of type specimens for the genera Odontella and Zygoceros (Bacillariophyceae) with evidence for the new family Odontellaceae and a description of three new genera

FIGURES 87–90. Amphipentas pentacrinus Ehrenberg (Ambrin, New Hebrides [Ambrym, Vanuatu]). Fig. 87. Exterior pentagonal valve with elevations at each pole, an ocellus on summit; valve covered in anastomosing costae with long costae linking elevations to depressed valve centre; scale bar = 10 μm. Fig. 88. Elevation with distally inclined ocellus on summit, note hyaline valve margin extending beyond valve face, mantle attached by costae to its margin; scale bar = 1 μm. Fig. 89. Openings from rimoportulae situated submarginally equidistant between ocelli, anastomosing costae enclosing several poroid areolae, most occluded by cribra with an occasional specialised pore (arrow); scale bar = 2 μm. Fig. 90. Interior with opening from rimoportula, interior openings of cribra and a specialised pore (arrow); scale bar = 1 μm.