![](https://diatomimaging.com/wp-content/uploads/2024/05/2024-05-11-01.45.18-ZS-retPM40xLmod-lab-copyright.jpg)
![](https://diatomimaging.com/wp-content/uploads/2024/05/20240511_131732.jpg)
Two examples of Actinoptychus trilingulatus from Tamatave, Madagascar. Prepared by JA Long. Mounted in Styrax and dated 1919. Olympus BHB microscope using 450nm LED light. 40x Leitz Pl Apo NA 1.00 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, brightfield lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. 36 images stacked in Zerene (Pmax).