Download high resolution image here.
The horizontal field-of-view shown is 0.544 mm. The ventral edge of the carapace can be seen and the bottom of the image. The outermost growth ring is visible at the top.
This image is from a
CombineZP processed stack of 219 images with a 0.9 µm step taken with a
Nikon CF BD 50X/0.90 ∞/- Apo microscope objective + Nikon 135 mm F2.8 telephoto lens + Nikon D810 camera (magnification 33.75X; technique described
here).