Morphology, morphogenesis and molecular phylogeny of a freshwater ciliate, Monomicrocaryon euglenivorum euglenivorum (Ciliophora, Oxytrichidae)

Shao, Chen; Hu, Chunxu; Fan, Yawen; Warren, Alan; X, Lin

doi:10.1016/j.ejop.2019.01.001

Cited by 33 publications

(13 citation statements)

References 37 publications

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“…Additionally, Bistichella falls into a clade which includes Uroleptoides, Parabistichella, Orthoamphisiella, Lamtostyla, Keronopsis, Paraholosticha and Pseudokahliella, and shares the same morphological features, i.e., at least one long or moderate long frontoventral row, one marginal cirral row on each side, constantly three bipolar dorsal kineties, and a lack of dorsomarginal kineties. They are all non-dorsomarginalian hypotrichs, and this clade is separate with Dorsomarginalia, all species of which have dorsomarginal row [1,19,21,[23][24][25][26][27][28][29]. The result further proves the importance of dorsal structure in hypotrichous classi cation.…”

Section: Morphogenetic Comparisonmentioning

confidence: 66%

“…Bistichella kenyaensis differs from the B. granulifera n. sp. by having body shape ellipsoid to slenderly ellipsoid, and usually widest anterior of mid-body (vs. elongated oval and widest at mid-body), the right frontoventral row with a very wide break in the middle quarters of body (vs. no break), fewer adoral membranelles (21-30 vs. 33-38) and cirri in the frontal rows (4-6 vs.7-10), frontoventral row I (9-20 vs. [26][27][28][29][30][31][32][33][34][35][36][37] and right marginal row (30-43 vs. 48-54), shorter frontoventral row I (terminates at 54% vs. 90% down length of body) and no cortical granules (vs. present) [4].…”

Section: Morphogenesis (Fig 3 and Fig 4)mentioning

confidence: 99%

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Morphology, morphogenesis and phylogeny of the new soil ciliate, Bistichella granulifera n. sp. (Protista, Ciliophora)

Lyu¹,

Wang

et al. 2020

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Background: Hypotrichous ciliates are showing extremely morphological diverse and complicated morphogenesis. However, many hypotrichs are still unknown/poorly-known and need to be explored. Recently, Foissner (2016) reassigned the species in Bistichella and Parabistichella. Due to lack of morphological and morphogenetic information, some problems were overlooked. In present work, a new species, Bistichella granulifera n. sp., was found in northern China. Based on its infraciliature, ontogenesis analyses and phylogenetic study, the phylogenetic position of Bistichella was discussed.Results: Bistichella granulifera n. sp. was characterized by having elongated oval body, two macronuclear nodules, cortical granules present, three frontal and three or four buccal cirri, three frontal rows with seven to ten cirri, usually two frontoventral rows with the left one usually terminates at 90% down length of body and no breaks in the right one. The main morphogenetic features of the novel species were as follows: (1) the posterior part of the old adoral membranelles is renewed; (2) frontoventral-transverse cirral anlagen III to V each form a frontal row, and anlagen VI to n each produce a frontoventral row; (3) both marginal rows and dorsal kineties develop intrakinetally; (4) the macronuclear nodules fuse to form a single mass. The gene sequence of Bistichella was investigated for the first time. Phylogenetic analyses based on the SSU rDNA sequences showed that the Bistichella groups with the non-dorsomarginalian hypotrichs.Conclusions: Morphology, morphogenesis and phylogenetic position of Bistichella granulifera n. sp., was investigated. Each frontoventral row originates from one anlage and only three bipolar dorsal kineties are present in the new species, which means it should belong to non-Dorsomarginalia rather than Amphisiellidae. Even though Bistichella has a close relationship with amphisiellids, due to the limited gene sequence, the phylogenetic position of Bistichella needs more data to be fully understood.

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Section: Morphogenetic Comparisonmentioning

confidence: 66%

Section: Morphogenesis (Fig 3 and Fig 4)mentioning

confidence: 99%

Morphology, morphogenesis and phylogeny of the new soil ciliate, Bistichella granulifera n. sp. (Protista, Ciliophora)

Lyu¹,

Wang

et al. 2020

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“…The Hypotricha Stein, 1859 is a speciose and morphologically diverse group that inhabits a wide range of biotopes [1][2][3][4][5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Morphology, Ontogeny and Molecular Phylogeny of a New Urostylid Ciliate, Bakuella (Pseudobakuella) Guangdongica n. sp. (Protista, Ciliophora, Hypotrichia) from Southern China

Wang

et al. 2020

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Background: Spirotrich ciliates are one of the most diverse groupsin the phylum Ciliophora and are widely distributed in marine, freshwater, and terrestrial biotopes. Many nominal species are, however, poorly known and their systematic positions remain uncertain due to the lack of information concerning their infraciliature, morphogenesis, and gene sequences. In this paper, the morphology and morphogenesis of Bakuella (Pseudobakuella) guangdongica n. sp. were studied, in addition, genomic DNA was extracted in order to sequence the small subunit rDNA. Results: Bakuella (Pseudobakuella) guangdongica n. sp. is characterized by 150–225 µm in vivo; 35–42 adoral membranelles; three to five buccal, two frontoterminal and eight to 13 transverse + pretransverse cirri; midventral complex comprised of 10–20 midventral pairs and two midventral rows extending to transverse cirri; posterior part of marginal rows slightly overlapped; colorless cortical granules about 1 μm across, arranged in small groups; soil habitat. Its main ontogenetic features are: (1) in the proter, the parental adoral zone of membranelles is completely renewed by new structures; (2) in the opisthe, the oral primordium originates apokinetally, some old midventral cirri join the formation of frontoventral-transverse cirral anlagen; (3) the anlagen for marginal rows and dorsal kineties develop intrakinetally; and (4) the numerous macronuclear nodules fuse into a single mass before dividing. Phylogenetic analyses based on the SSU rDNA sequence suggests the non-monophyly of the genus Bakuella. Conclusions: The morphology, morphogenesis and molecular phylogeny of the new hypotrichous ciliate, Bakuella (Pseudobakuella) guangdongica n. sp. were studied, the phylogenetic analyses show that the Bakuella is polyphyletic in the SSU rDNA.

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“…As the most diverse linages of ciliates, the subclass Hypotrichia Stein, 1859 has been the subject of much research. A consistent focus in that research has been the use of silver staining methods to reveal species characteristics that are important for taxonomic classification and for determining the morphogenetic processes, as well as the use of molecular technologies to reveal their evolutionary relationships [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. And even so, overall previous findings failed to recover the monophyly of Hypotrichia and the classification, validity, delimitation and phylogenetic relationships among and within these groups remains problematic [26,27].…”

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Cell-division pattern and phylogenetic position of a new ciliate genus Parasincirra n. g. (Protista, Ciliophora, Hypotrichia), with report of a new soil species, P. sinica n. sp. found from northwest China

Zhao

Zhang

et al. 2019

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Ciliated species, unicellular eukaryotes, are extremely diverse and occupy a very broad spectrum of ecological niches. Even though there is a growing recognition that enormous ciliates associates with key ecosystem processes in different niches, their diversity is not well understood. One reason is that ciliates are very tiny and may often be overlooked in routine biodiversity survey. Furthermore, the morphological and genetic diversity of ciliates per se is vast and dwarfs that among other multicellular eukaryotes. Here, we present the study of a new stichotrichid ciliate, Parasincirra sinica n. g., n. sp. based on classical living morphology, infraciliature, ontogenesis analyses and a comprehensive phylogenetic study, and enhance understanding of ciliates diversity in sludge soil. This new, monotypic genus is defined by having a bipartite adoral zone of membranelles, three frontal cirri, an amphisiellid median cirral row about as long as, or slightly longer than, the adoral zone, one short frontoventral cirral row, cirrus III/2 and transverse cirri present, buccal cirrus and caudal cirri absent, three dorsal kineties. The main morphogenetic features are: (1) five frontoventral-transverse cirral anlagen (excluding undulating membranes anlage) are formed in primary mode; (2) the amphisiellid median cirral row is formed by anlagen V and VI, while the frontoventral row is generated from anlage IV; (3) cirral streaks IV to VI generate one transverse cirrus each; (4) frontoventral-transverse cirral anlage II generates one or two cirri, while the posterior one will be absorbed in late stages, that is, no buccal cirrus is formed; (5) the posterior part of the parental adoral zone of membranelles is renewed; (6) dorsal morphogenesis follows a typical Gonostomum -pattern. Based on the SSU rDNA information, analyses of the phylogenetic relationship inferred from Bayesian inference and maximum likelihood analyses were unable to outline the exact position of this new form among some other species of related genera which are generally assigned in the family Amphisiellida . The morphological/ morphogenetical differences between the new genus/species and Uroleptoides / Parabistichella , as well as other amphisiellids, clearly support the validity of the establishment of this new genus Parasincirra .

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Morphology, morphogenesis and molecular phylogeny of a freshwater ciliate, Monomicrocaryon euglenivorum euglenivorum (Ciliophora, Oxytrichidae)

Cited by 33 publications

References 37 publications

Morphology, morphogenesis and phylogeny of the new soil ciliate, Bistichella granulifera n. sp. (Protista, Ciliophora)

Morphology, morphogenesis and phylogeny of the new soil ciliate, Bistichella granulifera n. sp. (Protista, Ciliophora)

Morphology, Ontogeny and Molecular Phylogeny of a New Urostylid Ciliate, Bakuella (Pseudobakuella) Guangdongica n. sp. (Protista, Ciliophora, Hypotrichia) from Southern China

Cell-division pattern and phylogenetic position of a new ciliate genus Parasincirra n. g. (Protista, Ciliophora, Hypotrichia), with report of a new soil species, P. sinica n. sp. found from northwest China

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