Spaulding, S.,
Edlund, M.
(2008).
Pseudostaurosiropsis.
In Diatoms of North America.
Retrieved May 01, 2026, from https://diatoms.org/genera/pseudostaurosiropsis?x-craft-preview=cab8b13ef68d1e257235fd2491770f51dfe0c9a6c0ad3b95411776e5316d603alxhbyabypv
Araphid
Pseudostaurosiropsis
Striae uniseriate, radial
Apical porefield present at each pole
Valve margin spinose
Spines flattened, bifurcate
Pseudostaurosiropsis includes species that are small, with elliptic to rounded valves. The striae are uniseriate, composed of 2-6 round areolae externally occluded with discoid volae. Two apical porefields are present, composed of a few, isolated pores. Spines are present at the valve margin, aligned with a stria. The spines are...