Final answer:
The term 'sarcodina' refers to a group of protozoans that includes amoebas like Amoeba proteus, known for their movement and feeding using pseudopodia. Dictyostelium, also a sarcodine, has distinct life stages such as a 'slug' and sporocarps.
Step-by-step explanation:
An example of a sarcodina is the amoeba, particularly the well-studied Amoeba proteus. Sarcodina, or sarcodines, are a group of protozoan protists characterized by their use of pseudopodia for locomotion and feeding. These pseudopodia are temporary projections of the cell's cytoplasm. Sarcodines are usually found in water or moist environments. While there are various types, the amoeba is often cited as a classic example due to its simple structure and easy observability under a microscope. Another notable organism within this group is Dictyostelium, which has unique life stages, including a 'slug' and developing sporocarps.