• Thalassiothrix nitzschioides : (Grunow) Grunow (1881)
• Thalassiothrix fraunfeldii var. nitzschioides: (Grünow) Jörgensen (1990)
• Thalassiothrix frauenfeldii : Grunow
• Thalassiothrix curvata: Castracane (1886)
• Synedra nitzschioides var. minore: Cleve (1883)
• Synedra nitzschioides: Grunow

The cells are joined together by triangular mucous cushions to form zigzag-shaped colonies. Alternatively, they be joined at the foot pole, forming fan-shaped colonies. In girdle view, the cells appear rectangular and slightly narrower in the centre; in valve view they appear linear or slightly curved. The extremities are rounded and similar to each other in terms of both shape and width. In addition, a short apical spine is visible by optical microscope. In the cell numerous small chromatophores are visible.

Neritic, cosmopolitan, absent from Polar regions.

Distribution:  as Thalassionema nitzschioides in Europe: Croatia (Vilicic et al. 2009), Netherlands (Dijkman & Kromkamp 2007), Romania (Caraus 2002). In the Atlantic Islands: Canary Islands (Gil-Rodriguez et al. 2003). In North America: Nova Scotia (Kim, Garbary and McLachlan, 2004) in Asia: Japan (Sawai et al. 2005). in the Antarctic and Sub-Antarctic Islands: Antarctic (Scott and Thomas 2005).

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

Photosynthetic characteristics of the phytoplankton in the Scheldt estuary: community and single-cell fluorescence measurements., European Journal of Phycology 41:, Dijkman N.A., Kromkamp J.C., 2007, 425-434.

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.

Diatoms. In: Antarctic marine protists. (Scott, F.J. & Marchant, H.J. Eds), Canberra & Hobart: Australian Biological Resources Study; Australian Antarctic Division, Scott F.J., Thomas D.P., 2005, 13-201.

Liste des Diatomées de la Mer Noire., Scripta Botanica. Bot. Zap. 19:, Mereschkowsky C., 1902, 51-88

Checklist of Baltic Sea Phytoplankton Species. Baltic Sea Environment Proceedings No. 95, Helsinki Commission Baltic Marine Environment Protection Commission, Hällfors G., 2004,

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

Three extant species of Paralia (Bacillariophyceae) along the coast of Japan., Phycologia ., Sawai Y., Nagumo T., Toyoda K., 2005, 44: 517-529

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