Taxonomic and phylogenetic studies on two new freshwater Amphileptus species (Ciliophora, Pleurostomatida), from Lake Weishan, northern China

Zhang, Gongaote; Chi, Yong; Wang, Zhe; Wang, Ya; Liu, Ran; Warren, Alan; Zhao, Yan; Pan, Hongbo

doi:10.1016/j.ejop.2021.125854

Cited by 7 publications

(6 citation statements)

References 37 publications

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“…Based on the phylogenetic analyses presented here, the family Amphileptidae is consistently monophyletic, but the genus Amphileptus is non-monophyletic with A. qingdaoensis clustering with two Pseudoamphileptus species, which is consistent with previous studies [26,28,34,[37][38][39]46,[63][64][65].…”

Section: Phylogenetic Analysessupporting

confidence: 91%

“…Moreover, A. sinicus sp. nov. has two macronuclear nodules whereas A. quadrinucleatus and A. weishanensis have multiple macronuclear nodules [38,61].…”

Section: Discussionmentioning

confidence: 99%

“…nov. can be distinguished from them by having more right kineties (42-61 right kineties in Amphileptus sinicus sp. nov. vs. 19-24 right kineties in A. parapleurosigma; 25-35 right kineties in A. pleurosigma; 14-26 right kineties in A. proceroformis; 25-40 in A. procerus) [15,38,58]. Amphileptus piscinarius sp.…”

Section: Discussionmentioning

confidence: 99%

“…nov. [39]. Previous studies of Amphileptus though have found species with differences in only a single 18S rRNA gene base pair or no differences in these bases but still found apparently clear differences of morphology [38,39], with these instances also occurring in hypotrich ciliates [66]. The rates of morphological and molecular evolution between various higher species have been discussed in many studies [67][68][69][70].…”

Section: Phylogenetic Analysesmentioning

confidence: 99%

“…According to previous studies, the amphileptids are represented by five genera: Amphileptus Ehrenberg, 1830; Apoamphileptus Lin & Song, 2004; Amphileptiscus Song & Bradbury, 1998;Pseudoamphileptus Foissner, 1983; Opisthodon Stein, 1859. Amphileptus is the largest and oldest genus in the family Amphileptidae with a global distribution in a wide variety of habitats, usually free-swimming and typically gliding on the substrate [15,20,30,[35][36][37][38][39][40]. The species in Amphileptus might prefer to live in the vicinity of aquatic plants or eutrophic sites, and the abundance of these species recorded from samples collected in open water bodies is usually lower than in aquaculture water bodies.…”

Section: Introductionmentioning

confidence: 99%

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Diversity of Pleurostomatid Ciliates: Morphology, Taxonomy and Molecular Phylogeny of Freshwater Isolates Found in a Northern China Wetland, with a Description of Two New Species

Zhang,

Liu,

Pan

et al. 2024

Diversity

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Ciliates of the order Pleurostomatida play essential functions in microbial food webs from a variety of habitats and have been thought to possess a high level of diversity. Due to undersampling and often absent molecular data, the actual diversity and phylogenetic relationships within this group remain unclarified. To help address this deficiency, a survey of freshwater pleurostomatid ciliates was undertaken in Lake Weishan Wetland, northern China. Here, two new Amphileptus species, Amphileptus sinicus sp. nov. and Amphileptus piscinarius sp. nov., were investigated using modern morphological and molecular techniques. Amphileptus sinicus sp. nov. is characterized by possessing a comparatively large cell size of 330–490 μm, contractile vacuoles on both ventral and dorsal margins, and 8–10 left and 42–61 right kineties. Amphileptus piscinarius sp. nov. is characterized by possessing a cell size of 140–210 μm, a large distinctly developed apical extrusome group, 3–4 contractile vacuoles on the ventral margin, and 6–8 left and 24–28 right kineties. Phylogenetic results based on the 18S rRNA gene data of these two species group them with other congeners, with these data suggesting the genus Amphileptus is paraphyletic.

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Section: Phylogenetic Analysessupporting

confidence: 91%

“…Moreover, A. sinicus sp. nov. has two macronuclear nodules whereas A. quadrinucleatus and A. weishanensis have multiple macronuclear nodules [38,61].…”

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%