Aneumastus Mann and Stickle
Biraphid valves that had, until recently been included in Navicula (Navicula tuscula group). Aneumastus differs from Navicula in possessing plastids composed of 2 plates, which appear H-shaped in girdle view. The valves are lanceolate, with rostrate or capitate ends. Valve mantle is shallow, and areola complex. This genus is thought to share and affinity with Mastogloia, but lacks partectile chambers. The genus contains only a few species and occurs in epipelic habitats.
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.