Coscinodiscus- It is in the Coscinodiscaceae family and is usually referred to as one of the largest marine diatomic diatoms. Conscinodiscus' have many chloroplasts inside their cells that trap sunlight and create nutrients for the cell. Their cells are disc-shaped, cylindrical or wedge-shape and solitary. (Phytoplankton)
Biddulphia- The cells are usually robust and rectangular. They are normally attached to seaweed. Biddulphia valves have many thickenings, spines or ridges. They also usually have waxy margins. Biddulphia have simple pores that occur in the valve framework. (Phytoplankton)
Tintinnid Protozoa- Tintinnid are usually conical shaped or trumpet shaped. Most of tintinnids are marine species, but there are some that live in fresh and brackish water. These tintinnids like all protozoa are eukaryotic. Tintinnids have developed ciliations around their mouths, but the rest of the cell is only sparsely covered by them. (Zooplankton)
http://www.fao.org/docrep/ARTICLE/WFC/XII/0689-B2.HTM
“Coscinodiscus.” Accessed January 18, 2017. http://oceandatacenter.ucsc.edu/PhytoGallery/Diatoms/Coscinodiscus.html.
“Genus Detail : Algaebase.” Accessed January 18, 2017. http://www.algaebase.org/search/genus/detail/?genus_id=44312.
“Protozoan | Microorganism | Britannica.com.” Accessed January 18, 2017. https://www.britannica.com/science/protozoan.