Solitary or joined at the centre of the valve by a mucilaginous cushion. Pairs or triplets of cells joined at the cingulum are distinctly observed. In girdle view the valves appear cylindrical. There are labiate processes along the edge of the mantle forming a ring of rimoportulae. Along the cell wall there are numerous small chloroplasts.

Marine.

Distribution:  Europe: Romania (Caraus, 2002), Spain (Varela, 1982); Atlantic Ocean : Canary Islands (Ojeda Rodríguez, Gil-Rodríguez & Moreira-Reyes, 2005); North America: Nova Scotia (Kim, Garbary and McLachlan, 2004); Australia and New Zealand: New South Wales (Day et al., 1995), Queensland (Day et al., 1995), Victoria (Day et al., 1995).

The algae of Romania., Studii si Cercetari, Universitatea Bacau, Biologie 7, Caraus I., 2002, 1-694

Bibliographic check-list of non-marine algae in Australia., Flora of Australia Supplementary Series 4, Day S.A., Wickham R.P., Entwisle T.J., Tyler P.A., 1995, 1-276

Aportaciones al conocimiento de diatomeas bentónicas y ticoplanctónicas del puerto de Santa Cruz de Tenerife (islas Canarias)., Vieraea 33, Ojeda Rodríguez A., Gil-Rodríguez M.C., Moreira-Reyes A., 2005, 59-78.

Phytoplankton dynamics in Pomquet Harbour, Nova Scotia: a lagoon in the southern Gulf of St., Lawrence. Phycologia 43, Kim K.Y., Garbary D.J., McLachlan J.L., 2004, 311-328.

Catálogo florístico de las diatomeas bentónicas de las costas de Galicia, Collectanea Botanica 13(2), Varela M., 1982, 987 - 996