New considerations of the systematics of the family Holophryidae (Protozoa, Ciliophora, Prostomatea) with a description of Holophrya paradiscolor sp. nov. and a redescription of Pelagothrix plancticola

IF 1.8 3区环境科学与生态学 Q2 BIODIVERSITY CONSERVATION Systematics and Biodiversity Pub Date : 2022-01-27 DOI:10.1080/14772000.2021.2012296

Limin Jiang, Congcong Wang, A. Warren, Honggang Ma, Xiaozhong Hu

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引用次数: 4

Abstract

The diversity of the family Holophryidae is relatively poorly known due to a lack of studies using modern methods, the paucity of taxonomically informative characters for species circumscription, and the morphological similarity among holophryids. In the present study, two holophryid ciliates, namely Pelagothrix plancticola and Holophrya paradiscolor sp. nov., isolated from two freshwater ponds in Qingdao, China, are reported. The morphology of both species was described based on living observation and protargol staining, and their molecular phylogeny was analysed using SSU rRNA gene sequence data. Pelagothrix plancticola has never been redescribed since its establishment. Based on new data, an improved diagnosis of P. plancticola is supplied. Holophrya paradiscolor sp. nov. is distinguished by a combination of features including a single macronucleus, the absence of endosymbiotic green algae, and the presence of two types of extrusomes. Following the addition of two new sequences, the molecular phylogeny of the family Holophryidae was analysed. Finally, the information on the habitats and geographic distribution of holophryids was reviewed. http://zoobank.org/urn:lsid:zoobank.org:pub:3D2D3902-58BA-47D7-A5DE-FEA0A5163384

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Holophryidae科系统学的新思考（原生动物、Ciliophora、Prostomatea）——附Holophrya paradiscolo sp.nov.的描述和Pelagothrix planticola的重新描述

由于缺乏使用现代方法的研究，物种界限的分类信息特征匮乏，以及全孔目之间的形态相似性，全孔目的多样性相对鲜为人知。本研究报道了从青岛两个淡水池塘中分离到的两种全缘纤毛虫，即Pelagothrix planticola和Holophrya paradiscolor sp.nov。根据活体观察和鱼精蛋白染色描述了这两个物种的形态，并使用SSU rRNA基因序列数据分析了它们的分子系统发育。Pelagothrix planticola自成立以来从未被重新定义。根据新的数据，提供了一种改进的平脊灰蝶诊断方法。副变色Holophrya paradiscolor sp.nov.的特征组合，包括单个大核、不存在内共生绿藻和存在两种类型的挤出体。在添加两个新序列后，对Holophryidae家族的分子系统发育进行了分析。最后，综述了全翅目动物的栖息地和地理分布情况。http://zoobank.org/urn:lsid:zoobank.org:pub:3D2D3902-58BA-47D7-A5DE-FEA0A5163384

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来源期刊

Systematics and Biodiversity 环境科学-生物多样性保护

CiteScore

4.10

自引率

0.00%

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审稿时长

>24 weeks

期刊介绍： Systematics and Biodiversity is devoted to whole-organism biology. It is a quarterly, international, peer-reviewed, life science journal, without page charges, which is published by Taylor & Francis for The Natural History Museum, London. The criterion for publication is scientific merit. Systematics and Biodiversity documents the diversity of organisms in all natural phyla, through taxonomic papers that have a broad context (not single species descriptions), while also addressing topical issues relating to biological collections, and the principles of systematics. It particularly emphasises the importance and multi-disciplinary significance of systematics, with contributions which address the implications of other fields for systematics, or which advance our understanding of other fields through taxonomic knowledge, especially in relation to the nature, origins, and conservation of biodiversity, at all taxonomic levels. The journal does not publish single species descriptions, monographs or applied research nor alpha species descriptions. Taxonomic manuscripts must include modern methods such as cladistics or phylogenetic analysis.