FIGURES 29–35 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 29–35. Parodontella calamus (Brun and Tempère) Komura (Sendai, Japan). Fig. 29. Reproduction of plate 5, fig. 15 for Biddulphia calamus from Tempère and Brun (1889 [1890]) (not to scale). Fig. 30. Tilted valve exterior with four stout spines positioned marginally on valve face, crenulated marginal ridge and deep expanded mantle; scale bar = 60 μm. Fig. 31. Valve exterior flat, with lanceolate valve face with central sternum, broad mantle extending around apices; scale bar = 43 μm. Fig. 32. Apical view with short narrow elevations at apices, four very long stout spines expanded at base and long spinules on mantle; scale bar = 43 μm. Fig. 33. Valve interior with foramina, interior and exterior openings of rimoportula and crenulated marginal ridge; scale bar = 25 μm. Fig. 34. Apical axis, mantle with radially aligned with rows of poroids between longitudinal, barely raised, costae; scale bar = 10 μm. Fig. 35. Interior, foramina and sunken papillus with central slit, which is the opening of a rimoportula; scale bar = 4.3 μm.