choanoflagellate

choanoflagellate
/koh'euh noh flaj"euh layt'/, n. Zool.
any flagellate of the genera Monosiga and Proterospongia, having a protoplasmic collar encircling the base of the flagellum.
[1895-1900; < NL Choanoflagellata name of the order. See CHOANOCYTE, FLAGELLATA]

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      any protozoan of the flagellate order Choanoflagellida (sometimes classified in the order Kinetoplastida) having a transparent food-gathering collar of cytoplasm around the base of the flagellum. Many choanoflagellates are solitary and sessile (attached to a surface), with or without a stalk. Some have a lorica (rigid covering). These organisms closely resemble the collar cells of sponges. Salpingoeca is an example.

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