#sanfrancisco #jurassic #Radiolaria #micropaleontology Not knowing what else they’d be, I presume these are radiolarians …
#sanfrancisco #jurassic #Radiolaria #micropaleontology
Sunday #Plankton Factoid 🦠🦐
Next #zooplankton important to #paleooceanography with a long geological record are #Foramanifera. Like #Radiolaria forams are unicellular amoeboid protozoa, planktonic or benthic with spectacular shaped Tests made of mostly calcium carbonate with pores they exude pseudopodia to capture prey or uptake DOC. Some have symbiotic algae. Known for millenia, but their complicated life cycles, alternating haploid and diploid aren't well documented.
https://en.m.wikipedia.org/wiki/Foraminifera
#plankton #zooplankton #paleooceanography #foramanifera #Radiolaria
Sunday #Plankton Factoid 🦠🦐
Next posts are on #zooplankton which form the sediments of the seafloor. Starting with #Radiolaria, single-celled amoeboid protozoa. Non-motile but control buoyancy with gas vacuoles. Known for spectacularly intricate cortical shells made of siliceous opal covered by an extended cytoplasm they use to engulf plankton and detritus. The shells (radiolarian-ooze) cover large swaths of the tropics and are used in the study of #paleooceanography.
https://www.radiolaria.org/what_are_radiolarians.php
#plankton #zooplankton #Radiolaria #paleooceanography