ABSTRACT

The morphology and morphogenesis of a new soil hypotrichous ciliate, Sterkiella paratricirrata n. sp., collected from north China, were studied using live observation and protargol staining. The new species is characterised as follows: body elliptical, 70–100 × 35–50 µm in vivo, an average of 26 adoral membranelles, 16 frontoventral-transverse cirri with three transverse cirri closely positioned and four frontoventral cirri arranged in triangle, two macronuclear nodules and resting cyst with polygon wrinkles. The ontogenetic process in Sterkiella paratricirrata n. sp. is characterised by anterior portions of anlagen II and III of the opisthe proliferate and merge with the disaggregating cirri II/2 and III/2, respectively, to form anlagen II and III of the proter; segmentation of the frontoventral-transverse cirral anlagen generated in a 1:2:2:3:4:4 pattern. Based on the phylogenetic tree, the monophyly of Sterkiella is not supported. Sterkiella paratricirrata n. sp. forms a clade with Rigidohymena candens and R. quadrinucleata with high support, while it has a long distance with the morphologically similar species, S. tricirrata.

http://www.zoobank.org/urn:lsid:zoobank.org:pub:1872D857-30EF-4E4C-85B8-82CCFE465D56

摘要

一种新的土壤下纤毛虫，Sterkiella paratricirrata n的形态和形态发生。从华北地区收集到的海藻sp.sp.使用活体观察和protargol染色进行了研究。新物种的特征如下：体椭圆形，体内70–100×35–50 µm，平均26个额膜，16个额腹横行腹膜，三个横向腹膜紧密排列，四个额腹腹膜成三角形排列，两个大核结节和息肉囊肿伴多角形皱纹。副食斯特尔氏菌的发生过程。sp。其特征是鸦片的anlagen II和III的前部增生并分别与分解的cirri II / 2和III / 2合并形成前列腺的anlagen II和III。以1：2：2：3：4：4模式生成的额腹横突椎板椎弓根分割。基于系统发育树，不支持Sterkiella的单亲。Sterkiella paratricirrata ñ。sp。在高支持力下与裂殖壶菌和四齿线虫形成支系，而与形态相似的种毛线虫（S. tricirrata）有很长的距离。

http://www.zoobank.org/urn:lsid:zoobank.org:pub:1872D857-30EF-4E4C-85B8-82CCFE465D56