FIGURES 111–116 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 111–116. Odontella rostrata (Hustedt) Simonsen (Redfish Bay, Aransas County, Texas, USA, ECT 3828 TX). Fig. 111. Valve exterior flat with elevations at apices, a rimmed ocellus on summit; valve face with raised circular valve centre and two opposing transapically aligned hollow spines off centre; spinules covering valve, some linking valve centre to foot of elevations and mantle; a broad hyaline expanded valve margin with a raised border surrounds the valve face; scale bar = 2 μm. Fig. 112. Valve with radial rows of poroid areolae mostly occluded by raised cribra with occasional specialised pores (arrow); scale bar = 1 μm. Fig. 113. Valve interior with broad hyaline valve margin; scale bar = 1 μm. Fig. 114. Detail of valve interior with openings from two rimoportulae; scale bar = 1 μm. Fig. 115. Mantle view of valve with attached girdle bands showing indented valve mantle and an outwardly directed elevation at each pole; scale bar = 2 μm. Fig. 116. Valve tilted with two long hollow spines off valve centre, the exterior openings of rimoportulae; scale bar = 1 μm.