1. The amebae; a subphylum of protozoa in the phylum Sarcomastigophora, possessing pseudopodia or locomotive protoplasmic flow for movement. Includes forms that possess flagella during development and forms with an internal or external test or skeleton and others lacking such a structure; asexual reproduction occurs by fission, and sexual reproduction, if present, by flagellate or ameboid gametes; most species are free-living.
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