Orizaformis holarctica, tem.... (c) Detail of the apex in the valve face....
Comparison of the morphological characters of two small thalassiosira species and the thalassiosiroid taxa having the rimoportula on valve face (minidiscus, livingstonia palatkaensis, and shionodiscus) and thalassiosira nordenskioeldii as the representative of the genus thalassiosira.Comparison of the morphological characters of two small Thalassiosira species and the thalassiosiroid taxa having the rimoportula on valve face (Minidiscus, Livingstonia palatkaensis, and Shionodiscus) and Thalassiosira nordenskioeldii as the representative of the genus Thalassiosira.
Psammoneis obaidii, lm (a-c) and sem (d-g).... (a) Ribbon-like colony linked by valve face, two plastids per cell....
Two new mesodictyopsis species, m. akitaensis sp. nov. and m. miyatanus sp. nov., from a late miocene to pliocene freshwater sediment, japan... akitaensis) on central valve face with two (in rare cases three in M....
