The cytology of the testaceous rhizopod Lesquereusia spiralis (Ehrenberg) Penard. I. Cytochemistry.

The cytology of the testaceous ameba, Lesquereusia spiralis (EHRENBERG) PENARD, has been described using a broad spectrum of cytochemical methods. Most cytological characteristics lie within the range of variability reported for free living non-shelled amebas. The shell of L. spiralis is complex, being composed of siliceous platelets positioned in an organic matrix. This interplatelet matrix is composed of sulfomucin complexed with basic protein. The matrix contains a complex of pore-like structures. The structure and possible origins and function of this matrix complex are discussed.