A temporary cytoplasmic extension is known as pseudopodium, which means literally ‘false foot’. Pseudopodia are powered by microfilaments near the cellular membrane. About half of the internal space in an amoeba contains microfilaments. A pseudopodium contains both granuloplasm and hyaloplasm.
Form and structure of the pseudopodia are important taxonomical characters. Depending upon their shape, several types of pseudopodia are distinguished, e.g.: