Cells joined in straight long chains composed of 6-12 cells. In girdle view the cells appear cylindrical, while in valve view they appear circular. Each cell has 6-12 setae arranged in a radial pattern. The setae of two adjacent cells bond at the base before forking again after a certain distance. The aperture between the cells is relatively large. The internal setae (between cells in the chain) lie in the valvar plane perpendicular to the axis of the chain. The terminal setae of the cells at the two extremities of the chain are thicker and have spines arranged in a spiral pattern; they point towards the inside of the chain. There are a number of small round chloroplasts arranged along the cell wall.

Oceanic, typical of temperate waters.

Distribution: in Europe: Croatia (Vilicic et al., 2009); Atlantic Ocean: Canary Islands (Gil-Rodríguez et al., 2003).

Composition and annual cycle of phytoplankton assemblages in the northeastern Adriatic Sea., Botanica Marina 52(4), Vilicic, Djakovac, Buric, Z. & Bosak, 2009, 291-305.

Proctoctista. In: Lista de especies marinas de Canarias (algas, hongos, plantas y animales). (Moro, L., Martín, J.L., Garrido, M.J. & Izquierdo, I. Eds), Las Palmas: Consejería de Política Territorial y Medio Ambiente del Gobierno de Canarias., Gil-Rodríguez M.C., Haroun R., Ojeda Rodríguez A., Berecibar Zugasti E., Domínguez Santana P., Herrera Morán B., 2003, 5 - 30