Aulacoseira Thwaites


Circular valves with elongated mantles, thickenings (= pseudosepta?) between mantle and girdle (called Ringleiste in the German literature), mantle distinctly punctate. Valves joined via elongate spines to form cylindrical filaments. Valves more commonly encountered in girdle view.

Species in this genus were previously referred to Melosira, but many differences in valve ultra structure between Melosira taxa led Simonsen (1979) to resurrect Aulacoseira.

Light Microscope Image(s)

Each image is accompanied by the genus and species, California Academy of Sciences slide number (ie. CAS 612010), location of the specimen on the slide, and dimension in microns.