Lago Paione Inferiore - diatomea (epi ed ipovalva)
Lago Paione Inferiore - catenella in vista connettivale
not sure but acrosphaeria is the best matching from the Eastern CT diatoms book
Diatoms are a major group of algae, and are among the most common types of phytoplankton. Most diatoms are unicellular, although they can exist as colonies in the shape of filaments or ribbons (e.g. Fragilaria), fans (e.g. Meridion), zigzags (e.g. Tabellaria), or stars (e.g. Asterionella). Diatoms are producers within the food chain. A unique feature of diatom cells is that they are enclosed within a cell wall made of silica (hydrated silicon dioxide) called a frustule....