Ko e monumanu unu (lea fakalatina (lea fakasaienisi): ecdysozoa) ko e vahe lahi (superphylum) ia ʻo e ngaahi monumanu ʻoku unu (kā ʻoku ʻikai kau ki ai ʻa e monumanu huituʻa ʻoku unu, fakatata ʻa e monumanu ngaolo pe totolo ). ʻOku fefeka ʻaupito honau kili, ko e ngeʻesi ia. ʻOku ʻikai te ne lava ke tupu. Taimi ʻe niʻihi ʻoku fōfoa ʻa e kili, pea ʻoku ne tupu ʻa e monumanu ki muʻa ʻa e fakafefeka hano kili foʻou. ʻOku toe ʻa e kili motuʻa, ko e ngeʻesi ʻoku ngeʻesi (faitā: ngeʻesi ʻo e hina).