Kibisidytes marinus Jepps, 1934
Diagnosis: Small amoeboid organism occurring in the sea, attached to the surface film or to some solid object by its shell. This is of a somewhat variable pouch-like form, brown in colour, and usually more or less heavily encrusted with some brown material. The body of the creature often does not fill the space in the shell, and the pseudopodia are very delicate, branched, often appearing beaded, and not very extensive outside the single opening. Solid food, mainly bacteria, is drawn into the shell. No contractile vacuole has been seen. The nucleus contains one to several staining granules irregularly arranged. Binary fission occurs in the shell.
Dimensions: 10-14 µm.
Reference: Jepps, M. W., 1934. Memoirs: On Kibisidytes marinus, n.gen., n.sp., and some other Rhizopod Protozoa found on surface films. J Cell Sci, s2-77 (305): 121–127. https://doi.org/10.1242/jcs.s2-77.305.121