Description of Leucocryptos

Junior synonym of Kathablepharis, taxa described under the name of L. marina are common members of the marine plankton, flagella inserting subapically, usually at the anterior end of a furrow with one or two longitudinal, parallel rows of few or several extrusomes. Two more types of scattered peripheral extrusomes. Body circular in cross-section. With a microtubule-lined ingestion apparatus opening at the apex of the cell.