Triceratium fractum. Single example on the slide. Underside view with the rim towards the coverslip. Prepared by J Tempère. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted d850 camera. 79 images stacked in Zerene (Pmax).
Now known as Triceratium castellatum var. fractum.