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Ringleiste

Rimoportula

 

Rostrate

An internal, silica ledge that projects into the cell interior from the collum. The ringleiste is found only in the genus Aulacoseira and is variously developed in different species of the genus.


Alternative Term

sulcus

The term sulcus is sometimes used, particularly with *A. ambigua*. The hollow ringliste may be called a 'U-shaped sulcus'.

Citations

Barber, H.G. and Haworth, E.Y. (1981). Guide to the Morphology of the Diatom Frustule. Freshwater Biological Association, 112 pp.