Carinoportulae

Capitate

 

Central nodule

A type of central process unique to the genus Orthoseira. The internal openings are simple, while the external openings are composed of well-defined collars.


Citations

Stoermer, E.F. and Julius, M.L. (2003). Centric Diatoms. In: Freshwater Algae of North America (J.D. Wehr and R.G. Sheath, eds) Elsevier Science pp. 559-594.