Azpeitia nodulifera syn Coscinodiscus nodulifer
Species of Azpeitia, like Coscinodiscus are identified by the areola pattern on the valve face. This can only be done accurately by viewing the cleared cell. "The genus was described from fossil material and encompasses living marine planktonic species as well. The living ones are better known as Coscinodiscus spp. and were transferred to Azpeitia by Fryxell et al. (1986)." See Tomas in Taxonomic References. Collected from Ross Sea area, Antarctica, December 2004.