
In a strew slide I received, I think it's freshwater fossil diatoms from Germany, I found this spiky thingy. 100x, brightfield.

I think it's a silicoflagellate.
More info here:
https://flic.kr/p/2k7Senr
https://flic.kr/p/2k7REer
Hope I'm allowed to plug my Instagram, 2 uploads a week.
https://www.instagram.com/macro__cosmos/
Thanks for viewing!