Here's a partial answer (stereo pair, crossed-eye). This was shot with a 50X objective on Canon T1i and cropped to a subject area about 0.17 mm wide by 0.30 mm high, so it displays about 700X on a typical monitor:
Backing way out, here's a view with 5X, uncropped so about 4.2 mm by 3.9 mm.
Intermediate, 20X. The stereo pair is of the area near the right side, just below center.
However, the images above can only be part of the story.
I guessed that someplace on the Internet there might be SEM photos of these things, so I did some searching.
Sure enough, I found these: (All these links are broken as of 8/11/2022), but see last post on this page for cached copies.)
- https://www.quorumtech.com/application- ... nd-insects
- userpixcached/https%253A%252F%252Fwww.q ... No0005.jpg
- userpixcached/https%253A%252F%252Fwww.q ... 252002.jpg
If anybody knows the function of these things, I would be fascinated to hear!
Technical info: all images with Mitutoyo M Plan Apo objectives on Raynox DCR-150 tube lens, flash illumination diffused through Kleenex tissue, processed with Zerene Stacker PMax. The stereo pair is synthetic, +-5% = +-6.8 degrees, 121 images at 0.001 mm focus step.
Edit: 8/11/2022, note broken links