A haptonema is a "flagellum like" structure arising from the cell apex near the other flagella. It contains several microtubules. Its exact function is unknown, but is thought to aid in attachment, feeding, or avoidance responses. A haptonema is a defining characteristic of a haptophyte.
Haptonema is a slender, hair-like appendage found in certain protists, particularly in haptophytes. Its primary function is to aid in the capture of prey and to assist in attachment to surfaces or substrates. The haptonema can also play a role in sensing the environment, helping organisms respond to various stimuli. Overall, it contributes to the organism's feeding and mobility.
Andrew John Gregson has written: 'The haptonema'