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基于多基因对裸口目强吻科（原生生物，纤毛虫纲）分子系统发育的研究，并对一个新属和新物种的个体发育作了说明。

Multi-gene-based investigation on the molecular phylogeny of the hypotrichous family Strongylidiidae (Protista, Ciliophora), with notes on the ontogeny of a new genus and new species.

作者信息

Song Wenya, Zhang Shijing, Li Yuqing, Ma Honggang, Li Qiyu, Luo Xiaotian, Al-Rasheid Khaled A S, Hines Hunter N, Lu Xiaoteng

机构信息

Institute of Evolution & Marine Biodiversity, Ocean University of China, Qingdao, 266003 China.

Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, 430072 China.

出版信息

Mar Life Sci Technol. 2024 Aug 23;6(3):442-461. doi: 10.1007/s42995-024-00243-z. eCollection 2024 Aug.

DOI:10.1007/s42995-024-00243-z
PMID:39219684
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11358561/
Abstract

UNLABELLED

Ciliates in the subclass Hypotrichia have long been difficult to classify as they are one of the most polymorphic and highly differentiated groups, leading to their systematics remaining unresolved. Phylogenetic relationships within the hypotrich family Strongylidiidae have been ambiguous due to discordance between the morphological and genetic data. In this study, a new strongylidiid genus is established, mainly based on the novel mode of origin of the ventral cirral rows: left ventral cirral row (LVR) originates from frontal-ventral-transverse cirral anlagen (FVTA) III (anterior portion), IV (middle portion), and V (rear portion); right ventral cirral row comes from the entire FVTA VI. A new species, gen. nov., sp. nov., is investigated along with the morphometric and molecular data from a population of . Eight new sequences and nuclear gene markers (single-gene and multi-gene) are provided to analyze the phylogenetic relationships of strongylidiids, with the COI gene utilized to uncover further genetic information at species level and below. The results reveal that: (1) Strongylidiidae is monophyletic and has a close relationship with Dorsomarginalia; (2) gen. nov. forms a clade that is sister to all the other strongylidiids; (3) Foissner, 1988 and Hemberger, 1985 should not be synonyms, and both genera should be subdivided due to their variable morphological characteristics; (4) LVR originating from three anlagen is a plesiomorphy of Strongylidiidae. The discovery of the origin of the LVR not only contributes to the establishment of the genus , but also helps to improve the diagnosis of the family Strongylidiidae.

SUPPLEMENTARY INFORMATION

The online version contains supplementary material available at 10.1007/s42995-024-00243-z.

摘要

未标注

长期以来，下毛亚纲的纤毛虫一直难以分类，因为它们是最具多态性和高度分化的类群之一，导致其系统发育关系仍未解决。由于形态学和遗传学数据不一致，下毛科强壮列虫科内部的系统发育关系一直不明确。在本研究中，主要基于腹侧纤毛列起源的新模式建立了一个新的强壮列虫科属：左腹侧纤毛列（LVR）起源于额腹横纤毛原基（FVTA）III（前部）、IV（中部）和V（后部）；右腹侧纤毛列来自整个FVTA VI。对一个新物种，新属，新种进行了研究，并提供了该物种群体的形态测量和分子数据。提供了八个新序列和核基因标记（单基因和多基因）来分析强壮列虫科的系统发育关系，利用细胞色素氧化酶亚基I（COI）基因在物种及以下水平揭示更多遗传信息。结果表明：（1）强壮列虫科是单系的，与背缘亚目关系密切；（2）新属形成一个分支，是所有其他强壮列虫科的姐妹群；（3）1988年的福斯纳强壮列虫属和1985年的亨贝格强壮列虫属不应是同义词，由于它们形态特征多变，两个属都应细分；（4）起源于三个原基的LVR是强壮列虫科的一个原始特征。LVR起源的发现不仅有助于新属的建立，也有助于改进强壮列虫科的诊断。

补充信息

在线版本包含可在10.1007/s42995-024-00243-z获取的补充材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/fd16/11358561/9cbfe6eb1712/42995_2024_243_Fig11_HTML.jpg
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