In L. capitata, the single row of radular teeth, adapted to only slitting and cutting, confines L. capitata to suctorial feeding. The leading tooth is used to puncture algal cell walls whereas the newer, unused teeth function as a spear shaft. Recently worn out older teeth are retained in an ascus sac (Thompson, 1976). Further restrictions on which algal species can be utilized may be due to the chemical structure of the algal polysaccharides and to the algal filament diameters (Jensen, 1975).
The radula is similar on the three British Limapontia species; it is uncertain whether this 4 tooth section is from L. capitata or a juvenile L. senestra. © D. Fenwick www.aphotomarine.com/

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