<P> Other organisms may also present amoeboid cells during certain life - cycle stages, e.g., the gametes of some green algae (Zygnematophyceae) and pennate diatoms, the spores (or dispersal phases) of some Mesomycetozoea, and the sporoplasm stage of Myxozoa and of Ascetosporea . </P> <P> The earliest record of an amoeboid organism was produced in 1755 by August Johann Rösel von Rosenhof, who named his discovery "Der Kleine Proteus" ("the Little Proteus"). Rösel's illustrations show an unidentifiable freshwater amoeba, similar in appearance to the common species now known as Amoeba proteus . The term "Proteus animalcule" remained in use throughout the 18th and 19th centuries, as an informal name for any large, free - living amoeboid . </P> <P> In 1822, the genus Amiba (from the Greek amoibè, meaning "change") was erected by the French naturalist Bory de Saint - Vincent . Bory's contemporary, C.G. Ehrenberg, adopted the genus in his own classification of microscopic creatures, but changed the spelling to Amoeba . </P> <P> In 1841, Félix Dujardin coined the term "sarcode" (from Greek sarx, flesh, and eidos, form) for the "thick, glutinous, homogenous substance" which fills protozoan cell bodies . Although the term originally referred to the protoplasm of any protozoan, it soon came to be used in a restricted sense to designate the gelatinous contents of amoeboid cells . Thirty years later, the Austrian zoologist Ludwig Karl Schmarda used "sarcode" as the conceptual basis for his Division Sarcodea, a phylum - level group made up of "unstable, changeable" organisms with bodies largely composed of' sarcode .' Later workers, including the influential taxonomist Otto Bütschli, emended this group to create the class Sarcodina, a taxon that remained in wide use throughout most of the 20th century . </P>

Where did the amoeba's name come from
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