Actinoptychus heliopelta from Dunkirk, Maryland, USA. Single example on the slide. Prepared by CJ Kirk. Material ex. RI Firth, no. 289. Mounted in Naphrax and dated 11/8/68. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo NA 1.40 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 48 images stacked in Zerene (Pmax).