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

Morphogenesis of cell division is investigated in Uronychia uncinata based on protargol impregnated apecimens. The conical morphogenetic events are similar to that known in other euplotids but exhibiting several characteristies: the oral primordium in proter being de novo developed in a subcortical pouch anterior to the parental AZM2; FC comes from anlage Ⅰ-Ⅲ; all frontoventral 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.

毛尾刺虫无性生殖周期中的形态和形态发生

利用蛋白银染色法研究了毛尾刺虫的形态及无性生殖周期中的形态发生。其过程为：（1）后仔虫口原基出现在左缘棘毛内侧深层，其内的毛基体组装成整齐排列的小膜并分化成新AZM1，AZW2和口侧膜。（2）前仔虫口原基出现在老仔虫AZK2之前方深处，其随后发育成前仔虫的AZK2、口侧膜及AZM1的一部分，并更新老结构AZM1产的第7—11片小膜。（3）额腹横棘毛原基为5列，分别以3：3：2：2：3方式分化并最终产生前、后仔虫的恒为3、2、5根额、腹、横棘毛，另外3个毛基体被吸收。（4）第一根额棘毛于前、后仔虫的口侧膜原基产生。（5）背触毛6列，分别于前、后仔虫的中部范围产生前、后仔虫第1—6列新原基，每列原基向两端伸展替代老背触毛列，成为前、后仔虫相应的第1—6列新背触毛；三根尾棘毛在发生上分别来自于DK5和DK6。