Auliscus radiatus. Single example on the slide. Also known as Pseudauliscus radiatus. P. radiatus is currently regarded as a synonym of Mastodiscus radiatus (Bailey) A.K.S.Prasad & Nienow. Prepared by Watson and Sons Ltd and mounted in Hyrax. 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 Nikon d850 camera. 18 images stacked in Zerene (Pmax).