An Actinoptychus sp. from San Paula (presumably Santa Paula), California, USA. Single example on the slide. No makers name, but I understand this is by JA Long. Olympus BHB microscope using 450nm LED light. 63x Leitz Pl Apo NA 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 71 images stacked in Zerene (Pmax).