Abstract：
Ciliates of the class Plagiopylea play a vital role in various anaerobic environments as consumers of prokaryotes. Yet, the diversity and phylogeny of this group of ciliates, especially marine representatives, remain poorly known. In this study, three Parasonderia species, viz., Parasonderia elongata spec. nov., and the already known P. cyclostoma and P. vestita, discovered in anaerobic sediments from various intertidal zones in China, were investigated based on their living morphology, infraciliature, and small subunit ribosomal rRNA gene sequences. Parasonderia elongata can be recognized by its larger body size, elongated body shape, oval oral opening, number of oral kineties, and significantly shortened leftmost postbuccal polykineties on the cell surface. Improved diagnosis and redescription of P. cyclostoma is provided for the first time, including data on infraciliature and molecular sequence. Phylogenetic analyses revealed that the three species cluster together and with the sequence of a Chinese population of P. vestita already present in the GenBank database, forming a robust clade.
摘要：
作为原核生物的消费者，斑叶类的纤毛虫在各种厌氧环境中起着至关重要的作用。然而，这组纤毛虫的多样性和系统发育，特别是海洋代表，仍然鲜为人知。在这项研究中,三种寄生虫，viz.,长形参规范.11月。,以及已知的环孔假单胞菌和vestita,在中国不同潮间带的厌氧沉积物中发现，根据它们的生活形态进行了调查，Infriciature,和小亚基核糖体rRNA基因序列。长形性寄生虫可以通过其较大的体型来识别，细长的身体形状，椭圆形口腔开口，口腔运动的数量，并显着缩短了细胞表面最左侧的颊后动力学。首次提供了改进的诊断和重新描述。包括非正式和分子序列的数据。系统发育分析显示，这三个物种聚集在一起，并与GenBank数据库中已经存在的中国念珠菌种群的序列聚集在一起，形成强大的进化枝。
