Bryozoa
Virus: top left
Mycoplasma: top right

https://en.m.wikipedia.org/wiki/Micropaleontology

https://en.m.wikipedia.org/wiki/Bryozoa

https://en.m.wikipedia.org/wiki/Brackish_water

Micropaleontology
Symbiogenesis
Cheilostomatida
Alga Invertebrate
Apicoplast Amoeba
Mycoplasma Virus
Protist Bryozoa
Airborne Spore

Cretaceous–Paleogene
Extinction Event