Integrative studies on three new freshwater Amphileptus species (Ciliophora, Pleurostomatida) discovered in northern China.

IF 5.8 2区生物学 Q1 MARINE & FRESHWATER BIOLOGY

Marine Life Science & Technology Pub Date : 2022-11-28 eCollection Date: 2022-11-01 DOI:10.1007/s42995-022-00143-0

Gongaote Zhang, Yalan Sheng, Yujie Liu, Xiao Cao, Saleh A Al-Farraj, Peter Vďačný, Hongbo Pan

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Abstract

The morphology and molecular phylogeny of freshwater pleurostomatid ciliates are insufficiently explored. In the present study, we investigated three new Amphileptus species discovered in Lake Weishan and its vicinity, northern China, using standard alpha-taxonomic methods. Amphileptus paracarchesii sp. nov. is characterized by a lateral fossa (groove) in the posterior body portion, four macronuclear nodules, contractile vacuoles distributed along the dorsal margin, and 4-6 left and 44-50 right somatic kineties. Amphileptus pilosus sp. nov. differs from congeners by having 4-14 macronuclear nodules, numerous contractile vacuoles scattered throughout the cytoplasm, and 22-31 left and 35-42 right somatic kineties. Amphileptus orientalis sp. nov. is characterized by two ellipsoidal macronuclear nodules, three ventral contractile vacuoles, and about four left and 31-35 right somatic kineties. Phylogenetic analyses of nuclear small subunit ribosomal DNA (SSU rDNA) sequences indicate that the family Amphileptidae might be monophyletic while the genus Amphileptus is paraphyletic, as Pseudoamphileptus macrostoma robustly groups with Amphileptus sp. Although deep phylogenetic relationships of amphileptids are poorly resolved, multiple well-delimited species groups are recognizable within the genus Amphileptus.

Supplementary information: The online version contains supplementary material available at 10.1007/s42995-022-00143-0.

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中国北方淡水两栖目三新种的综合研究(纤毛目，胸骨口目)。

淡水胸骨口虫纤毛虫的形态和分子系统发育研究尚不充分。本文采用标准α分类学方法，对在中国北部微山湖及其附近发现的三种Amphileptus进行了研究。副颌两栖的特征是:体后部有外侧窝(沟)，4个大核结节，沿背缘分布有可收缩的空泡，左侧4-6个，右侧44-50个。与同类植物不同的是，小毛猴有4-14个大核结节，细胞质中散布着许多可收缩的液泡，有22-31个左体和35-42个右体。东方蛇具有2个椭球状大核结节，3个腹侧收缩液泡，约4个左体和31-35个右体运动。核小亚基核糖体DNA (SSU rDNA)序列的系统发育分析表明，Amphileptidae家族可能是单系的，而Amphileptus属是副系的，因为Pseudoamphileptus macrostoma与Amphileptus sp强有力地类群。尽管Amphileptus属的深层系统发育关系尚不清楚，但在Amphileptus属中可以识别出多个划分良好的种群。补充信息:在线版本包含补充资料，下载地址:10.1007/s42995-022-00143-0。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Marine Life Science & Technology MARINE & FRESHWATER BIOLOGY-

CiteScore

9.60

自引率

10.50%

发文量

期刊介绍： Marine Life Science & Technology (MLST), established in 2019, is dedicated to publishing original research papers that unveil new discoveries and theories spanning a wide spectrum of life sciences and technologies. This includes fundamental biology, fisheries science and technology, medicinal bioresources, food science, biotechnology, ecology, and environmental biology, with a particular focus on marine habitats. The journal is committed to nurturing synergistic interactions among these diverse disciplines, striving to advance multidisciplinary approaches within the scientific field. It caters to a readership comprising biological scientists, aquaculture researchers, marine technologists, biological oceanographers, and ecologists.