Morphogenetic studies on Uronychia uncinata(Protozoa, Ciliophora) during its asexual division

Morphogenesis of cell division is investigated in Umnychia uncinata based on protargol impregnated specimans.The cortical morphogenetic events are similar to that known in other euplotids but exhibiting several characteristics:the oral primordium in proter being de novo developed in a subcortical pouch anterior to the parental AZM₂;FC comer from anlage I-Ⅲ;allfrontoventral and transverse cirri in both proter and opisthe deriving from 5 cirral streaks;development of proter oral primordia causing partial replacement of old AZM₁ caudal cirri coming from two DK anlagen.