Leptogromia
Leptogromia operculata is a species of testate amoeba which has three flexible 'membranes' which can be opened or closed, and has a large number of filopodia which "L. operculata" uses to move around and to catch prey. Description. "L. operculata" has a rounded and triangular aperture, with a small tube which it uses to fill its membrane. "L. operculata" has filopodia which have bidirectional streams of small granules. "L. operculata" also can show a web of long pseudopodia which it can use in order to catch prey , or to move around. Ecology. "L. operculata" usually lives in brackish and  marine environments. Volkanov (the person who first described leptogromia operculata) reported the first sighting of the testate amoeba in the black sea, and sampled the organism from sediment from a small stream of water. Remarks. The most remarkable feature of "L. operculata" is its globule which is always present in the cytoplasm just above its aperture, another remarkable thing about its aperture is that it has a triangular shape. However, Valkanov reported it as being cicular in shape, but he has probably overlooked this small trait.