Craticula Grunow (1868)

Cells usually lanceolate to linear lanceolate in valve view with subrostrate to rostrate apices, narrowly rectangular in girdle view. Live cells solitary, with two plate-like chloroplasts lying along the girdle, and extending slightly under the valve face. Often with 2 conspicuous droplets between the central cytoplasmic bridge and the cell apices. Valves with central raphe slits, continuing over the apices, slightly expanded at centre. Striae often more or less parallel, uniseriate with fine regular pores. Valves may appear as if transected also by longitudinal striae. Few girdle bands, each with a single row of pores.

Formerly included in Navicula sensu lato.

M.G. Kelly, H. Bennion, E.J. Cox, B. Goldsmith, J. Jamieson, S. Juggins D.G. Mann & R.J. Telford (2005). Common freshwater diatoms of Britain and Ireland: an interactive key. Environment Agency, Bristol.

Species described:-

Craticula cuspidata (Kützing) D. Mann