a group called the metamonads. They lack the feeding grooves found in most others, but this is probably a secondary loss as well.

Classification

Before reclassification, the parabasalids were divided into about seven to 10 orders depending on sources. Present classification divides Parabasalia into four orders, that is, Trichonymphida, Spirotrichonymphida, Cristamonadida, and Trichomonadida.
* The trichomonads

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