Liao Lijian, Hu Yue, Hu Xiaozhong
Key Laboratory of Mariculture (Ministry of Education), College of Fisheries, Ocean University of China, Qingdao 266003, China.
Key Laboratory of Evolution and Marine Biodiversity (Ministry of Education), Institute of Evolution and Marine Biodiversity, Ocean University of China, Qingdao 266003, China.
Microorganisms. 2024 Oct 4;12(10):2013. doi: 10.3390/microorganisms12102013.
Ciliated microeukaryotes are insufficiently investigated despite their ubiquity and ecological significance. The morphology and morphogenesis of a new Stichotrichida species, sp. nov., and the known Foissner et al., 2002, are here studied using live observations and protargol staining methods. The new species is characterized by having one buccal, one parabuccal and three frontal cirri, one frontoventral row extending to the posterior half of the cell, three left and two right marginal rows and three dorsal kineties with the left kinety conspicuously bipartite, along with one caudal cirrus at the rear end of each kinety. During morphogenesis, there exist five frontal-ventral cirral anlagen with anlagen IV and V forming a frontoventral row in the proter, and four cirral anlagen with only anlage IV generating a frontoventral row in the opisthe. The anlagen for marginal rows and dorsal kineties develop intrakinetally. The new population of corresponds well with other isolates regarding morphology and cell development. Phylogenetic analyses based on small subunit ribosomal gene sequence data revealed that both and are deeply clustered in the clade consisting of species from the genera and , supporting the placement of both genera into the family Deviatidae Foissner, 2016.
尽管纤毛微型真核生物无处不在且具有生态意义，但对它们的研究仍不充分。本文利用活体观察和原银染色方法，研究了一种新的腹毛目物种，即新种，以及已知的福斯纳等人（2002年）的形态和形态发生。新物种的特征是有一个口围、一个副口围和三个额触毛，一条额腹列延伸到细胞后半部，三列左缘毛和两列右缘毛，以及三列背动基列，其中左动基列明显二分，每个动基列后端还有一个尾触毛。在形态发生过程中，存在五个额腹触毛原基，其中原基IV和V在前仔虫中形成一条额腹列，四个触毛原基中只有原基IV在后仔虫中产生一条额腹列。缘毛列和背动基列的原基在动基列内发育。新种群在形态和细胞发育方面与其他分离株非常吻合。基于小亚基核糖体基因序列数据的系统发育分析表明，新种和已知种都深度聚类在由属和属的物种组成的分支中，支持将这两个属归入福斯纳2016年的偏斜科。
