Houk and Klee 2004 Category: Centric
TYPE SPECIES: Discostella stelligera (Cleve and Grunow) Houk and Klee
Smallest to largest - 2 taxa sorted by maximum length
Discostella grows as solitary cells or forms colonies in chains. The central area may be flat or concentrically undulate. Large, distinctive alveoli form a star-shaped pattern in the central valve. Radial costae are present at the valve margin. Small spines may be present or absent on the costae. Central to the costae are striae, which may be uniseriate or multiseriate. Marginal fultoportulae are present, located on every few striae. A single rimoportula is positioned on the margin of the valve, between two costae.
Discostella contains the ‘stelligeroid’ Cyclotella sensu lato species, and includes D. stelligera, D. pseudostelligera, D. woltereckii, D. glomerata, D. stelligeroides. In general, the group is widespread in planktonic habitats.
Cite This Page:
Spaulding, S., and Edlund, M. (2009). Discostella. In Diatoms of the United States. Retrieved May 28, 2016, from http://westerndiatoms.colorado.edu/taxa/genus/Discostella