Anteholosticha foissneri n. sp., a marine hypotrich ciliate (Ciliophora: Spirotrichea) from Vietnam: Morphology, morphogenesis, and molecular phylogeny

Jung, Jae-Ho; Omar, Atef; Park, Mi-Hyun; Nguyen, Tu Van; Jung, Yun-Hwan; Yang, Hee-Min; Min, Gi–Sik

doi:10.1016/j.ejop.2021.125768

Cited by 23 publications

(6 citation statements)

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“…Because the genus Anteholosticha was established based only on a combination of plesiomorphies in the absence of obvious synapomorphies, Berger (2003Berger ( , 2006 had hypothesized the nonmonophyly of Anteholosticha. Subsequently, the non-monophyly of Anteholosticha has been reported in many previous studies (Park et al, 2013;Zhao et al, 2015;Fan et al, 2016;Chen et al, 2018Chen et al, , 2020Paiva, 2020;Jung et al, 2021). Our analyses also confirm that Anteholosticha species are scattered among different branches inside the core urostylid assemblage.…”

Section: Phylogenetic Analyses Of the Genus Heterobakuella And Anteholostichasupporting

confidence: 87%

“…nov. matches the generic definition of Anteholosticha given by Berger (2003). Hitherto, Anteholosticha is non-monophyletic and comprises more than 40 species (Berger, 2003(Berger, , 2006(Berger, , 2008Li et al, 2011;Xu et al, 2011;Park et al, 2013;Fan et al, 2016;Chen et al, 2018Chen et al, , 2020Jung et al, 2021). In terms of the vermiform shape (length:width ratio more than 5:1), the presence of many (more than 20) macronuclear nodules, three enlarged frontal cirri, three dorsal kineties, and a continuous adoral zone of membranelles, the following three species, namely A. fasciola (Kahl, 1932) Berger, 2003, A. grisea (Kahl, 1932) Berger, 2003, and A. violacea (Kahl, 1932) Berger, 2003, should be compared with Anteholosticha perezuzae sp.…”

Section: Comparison Of Anteholosticha Perezuzae Sp Nov With Congenersmentioning

confidence: 65%

“…The genus Anteholosticha was established by Berger (2003) for some species previously assigned to Holosticha sensu Borror (1972), which lack distinct autapomorphies (e.g., anterior end of left marginal cirral row curved rightwards, adoral zone bipartite, buccal cirrus distinctly ahead of paroral membrane). Many studies have shown that Anteholosticha is extremely divergent (Berger, 2006(Berger, , 2008Park et al, 2012Park et al, , 2013Huang et al, 2014;Lyu et al, 2015;Zhao et al, 2015;Chen et al, 2018Chen et al, , 2020Jung et al, 2021). Hence, Huang et al (2014) assigned three species, Anteholosticha warreni (Song and Wilbert, 1997) Berger, 2003, A. scutellum (Cohn, 1866) Berger, 2003, and A. petzi Shao et al, 2011, each with a roughly U-shaped pattern of transverse cirri and forming a clade distinctly separated from other Anteholosticha groups in molecular trees, to the newly erected genus Arcuseries.…”

Section: Introductionmentioning

confidence: 99%

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Taxonomy and Molecular Phylogeny of Two New Urostylid Ciliates (Protozoa: Ciliophora) From Chinese Wetlands and Establishment of a New Genus

et al. 2021

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Hypotrich ciliates with evolutionary novelties are continually being discovered, challenging the current taxonomic system and attracting increased attention. In the present work, two new urostylid ciliates, Heterobakuella bergeri gen. nov., sp. nov. and Anteholosticha perezuzae sp. nov., isolated from Chinese wetland samples, were identified based on morphology and 18S rRNA gene sequences. Heterobakuella gen. nov. is defined by three frontal cirri, single buccal cirrus, one parabuccal cirrus, midventral complex composed of cirral pairs and one cirral row, one left and two right marginal cirral rows, transverse and pretransverse cirri present, caudal and frontoterminal cirri absent. Heterobakuella can be easily distinguished from the morphologically most similar genus, Apobakuella, mainly by the single buccal cirrus (vs. one buccal cirral row) and one parabuccal cirrus (vs. several parabuccal cirral rows originated from different anlagen). Phylogenetic analyses show that H. bergeri branches within the clade formed by Bergeriella ovata, Monocoronella carnea, Anteholosticha gracilis, and Neourostylopsis spp., rather than the clade represented by Apobakuella. The other species, A. perezuzae, is mainly characterized by a distinctly slender body shape with an average length:width ratio about 7, distinctively shaped biconcave and greenish cortical granules, as well as one or two pretransverse cirri. Phylogenetic analyses indicate the genus Anteholosticha is non-monophyletic.

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Section: Phylogenetic Analyses Of the Genus Heterobakuella And Anteholostichasupporting

confidence: 87%

Section: Comparison Of Anteholosticha Perezuzae Sp Nov With Congenersmentioning

confidence: 65%

Section: Introductionmentioning

confidence: 99%

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Taxonomy and Molecular Phylogeny of Two New Urostylid Ciliates (Protozoa: Ciliophora) From Chinese Wetlands and Establishment of a New Genus

et al. 2021

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“…Ciliates (phylum Ciliophora Doflein, 1901) are a large group of unicellular eukaryotes with various lifestyles, including endosymbiotic, epibiotic, and free-living ( Van As and Basson, 2004 ; Bai et al, 2020 ; Wu et al, 2020 ; Foissner and Berger, 2021 ; Zhao et al, 2021 ). Hypotrichs (subclass Hypotrichia Stein, 1859) are not only one of the most morphologically differentiated ciliate groups, but also one of the most confused in terms of systematics and phylogeny (for reviews, see Berger, 1999 , 2006 , 2008 , 2011 ; Chen L. et al, 2020 , 2021 ; Paiva, 2020 ; Song et al, 2020 ; Xu W. et al, 2020 ; Xu Y. et al, 2020 ; Wang et al, 2020 ; Zhang et al, 2020a ; Jung et al, 2021 ; Li et al, 2021a , b ; Luo et al, 2021 ; Vd’ačný and Foissner, 2021 ). In the past decades, identification of hypotrichs mostly relied on interphase morphology, ontogenetic processes, and gene encoding for the small subunit (18S) rRNA molecule ( Foissner, 2016 ; Song and Shao, 2017 ; Jung and Berger, 2019 ; Kaur et al, 2019 ; Kim and Min, 2019 ; Ma et al, 2021 ; Wang et al, 2021a ).…”

Section: Introductionmentioning

confidence: 99%

Multi-Gene Phylogeny of the Ciliate Genus Trachelostyla (Ciliophora, Hypotrichia), With Integrative Description of Two Species, Trachelostyla multinucleata Spec. nov. and T. pediculiformis (Cohn, 1866)

et al. 2022

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Many hypotrich genera, including Trachelostyla, are taxonomically challenging and in a need of integrative revision. Using morphological data, molecular phylogenetic analyses, and internal transcribed spacer 2 (ITS2) secondary structures, we attempt to cast more light on species relationships within the genus Trachelostyla. The present multifaceted approach reveals that (1) a large-sized species with numerous macronuclear nodules, isolated from sandy littoral sediments in southern China, is new to science and is endowed here with a name, T. multinucleata spec. nov.; (2) two other Chinese populations previously identified as T. pediculiformis represent undescribed species; and (3) multigene phylogeny is more robust than single-gene trees, recovering the monophyly of the genus Trachelostyla with high bootstrap frequency. Additionally, ITS2 secondary structures and the presence of compensatory base changes in helices A and B indicate the presence of four distinct taxa within the molecularly studied members of the genus Trachelostyla. Molecular data are more suitable for delimitation of Trachelostyla species than morphological characters as interspecific pairwise genetic distances of small subunit (18S) rDNA, ITS1-5.8S-ITS2, and large subunit (28S) rDNA sequences do not overlap, whereas ranges of multiple morphometric features might transcend species boundaries.

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“…This group is playing an important role in the remineralization of organic material in aquatic ecosystems ( Foissner, 1999 ). Besides, numerous recent studies have also focused on the classification and phylogeny of hypotrichs ( Kaur et al, 2019 ; Park et al, 2020 ; Zhang et al, 2020 ; Chen et al, 2021 ; Jung et al, 2021 ; Li et al, 2021a , b ; Luo et al, 2021 ; Omar et al, 2021a , b ).…”

Section: Introductionmentioning

confidence: 99%

Redescription, Morphogenesis, and Molecular Phylogeny of Pseudosincirra longicirrata nov. comb., With Establishment of a New Genus Pseudosincirra nov. gen. (Ciliophora, Hypotrichia)

et al. 2021

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The morphology and morphogenesis of Pseudosincirra longicirrata nov. gen. and nov. comb., isolated from southern China, were investigated with living observation and protargol staining. Our population is similar to the original population in living characteristics and ciliary patterns. The main determinable morphogenetic features of P. longicirrata nov. comb. are the presence of five frontoventral-transverse cirral anlagen (FVT-anlagen) and a dorsomarginal kinety anlage. According to the origin of FVT-anlagen IV and V in proter, it can be determined that P. longicirrata nov. comb. possesses two frontoventral rows and one right marginal row. Hence, a new genus, Pseudosincirra nov. gen., is proposed, and the diagnosis of P. longicirrata nov. comb. is improved. The new genus is diagnosed as follows: adoral zone of membranelles and undulating membranes is in a Gonostomum pattern; there are three enlarged frontal cirri, one buccal cirrus, and one parabuccal cirrus; postperistomial cirrus and transverse cirri are lacking; there are two more or less long frontoventral rows and one right and two or more left marginal rows; cirri within all rows very widely spaced; dorsal kinety pattern is of Urosomoida type, that is, three dorsal kineties and one dorsomarginal kinety; and caudal cirri are present. Phylogenetic analyses based on the small subunit ribosomal (SSU rDNA) sequence data indicate that P. longicirrata nov. comb. clusters with Deviata and Perisincirra. It is considered that Pseudosincirra nov. gen. and Perisincirra paucicirrata should be assigned to the family Deviatidae; fine cirri, and cirri within all rows being relatively widely spaced, should be considered as plesiomorphies of Deviatidae; and Deviatidae is closely related to Dorsomarginalia or Strongylidium–Hemiamphisiella–Pseudouroleptus.

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Anteholosticha foissneri n. sp., a marine hypotrich ciliate (Ciliophora: Spirotrichea) from Vietnam: Morphology, morphogenesis, and molecular phylogeny

Cited by 23 publications

References 25 publications

Taxonomy and Molecular Phylogeny of Two New Urostylid Ciliates (Protozoa: Ciliophora) From Chinese Wetlands and Establishment of a New Genus

Taxonomy and Molecular Phylogeny of Two New Urostylid Ciliates (Protozoa: Ciliophora) From Chinese Wetlands and Establishment of a New Genus

Multi-Gene Phylogeny of the Ciliate Genus Trachelostyla (Ciliophora, Hypotrichia), With Integrative Description of Two Species, Trachelostyla multinucleata Spec. nov. and T. pediculiformis (Cohn, 1866)

Redescription, Morphogenesis, and Molecular Phylogeny of Pseudosincirra longicirrata nov. comb., With Establishment of a New Genus Pseudosincirra nov. gen. (Ciliophora, Hypotrichia)

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