Morphology and Morphogenesis of Pseudourostyla levis (Ciliophora, Hypotrichia) from River Yamuna, Delhi, India.

Gupta, Sadhna

doi:10.59118/mivg7677

Cited by 2 publications

(2 citation statements)

References 31 publications

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“…Further, the marginal ciliature of the daughter cells developed from two sets of linear streaks, which develop within the marginal rows (RMC & LMC) at their anterior and equatorial ends as described for the family Oxytrichidae (Arora et al, 1999;Berger, 1999;Gupta et al, 2001Gupta et al, , 2003Gupta et al, , 2006Naqvi et al, 2006). These primordia then elongated and differentiated into new marginal rows for the two daughter cells (Figures 1B, 1C & 2B).…”

Section: Divisional Morphogenesismentioning

confidence: 95%

Morphology and Morphogenetic description of a new soil ciliate species of Notohymena indica n.sp. from Rithala waste-water treatment plant (WWTP), Delhi, India

Naqvi

2023

Vantage J Thematic Analys

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Ciliates are single celled eukaryotes which have been discovered from a wide variety of habitats. Their free-living forms are present in aquatic as well as terrestrial habitats. A large number of ciliates have also been recorded from wastewater treatment plants throughout the world. In WWTP these species are found from the final effluent as well as from the sewage sludge. In the present study, an Indian population of Notohymena gangwonensis was isolated from the sewage sludge samples collected from Rithala wastewater treatment plant (WWTP), Delhi, India, and is described on the basis of its morphology and morphogenesis. Morphological features of N. gangwonensis are as follows: flexible body; anterior lanceolate and posterior rounded end; body size about 51 x 15 μm in protargol preparations with body length:width ratio of around 3.5:1; large and deep buccal cavity; undulating membranes in Notohymena pattern; adoral zone with 19 (average) adoral membranelles; 18 frontalventral-transverse (FVT) cirri; one right and one left marginal row with about 14 and 13 cirri respectively; 6 dorsal rows consisting of 4 dorsal kineties (DKs) and two dorso-marginals (DMs), the fourth row of dorsal kineties (DK 4 ) being unique as it is 'curved', and occupies 2/3 rd of the cell; 3 caudal cirri; two macronuclear nodules; 1-4 micronuclei. The morphogenetic study showed de novo origin of oral primordium between left marginal cirral row and post oral ventral cirri, and involvement of five parental cirri (three frontals and two ventrals) in the formation of streaks I-VI for the proter and opisthe. Their morphological and morphogenetic characters were compared with the other members of the genus and it confirmed that the present species is Notohymena gangwonensis belonging to the subfamily Oxytrichinae, which is a new record from the Indian subcontinent. The morphogenesis of N. gangwonensis has also been described here for the first time.

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Section: Divisional Morphogenesismentioning

confidence: 95%

Morphology and Morphogenetic description of a new soil ciliate species of Notohymena indica n.sp. from Rithala waste-water treatment plant (WWTP), Delhi, India

Naqvi

2023

Vantage J Thematic Analys

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“…They also can be separated from each other by the dorsal kinety 4, i.e., distinctly shortened anteriorly in all morphs of T. polymorpha n. sp. while extending to the anterior body end in T. pustulata, an important, but highly underestimated, character in some stylonychine ciliates, for instance, it was found in Stylonychia ammermanni Gupta et al, 2001, S. gibbera Foissner, 2016, S. koreana Kumar et al, 2016, and both subspecies of T. bifaria (Berger, 1999;Gupta et al, 2001;Foissner, 2016;Kumar et al, 2016).…”

Section: Comparison Of Tetmemena Polymorpha N Sp With Related Taxamentioning

confidence: 99%

Polymorphism, gigantism, and cannibalism, one stylonychid ciliate (Ciliophora, Hypotricha) to rule them all

2023

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The morphology, ontogenesis, and molecular phylogeny of the polymorphic and cannibalistic giant forming Tetmemena polymorpha n. sp., found in a brackish water sample in South Korea, were investigated. The present species has long been misidentified as “Oxytricha bifaria.” The new investigation shows that the species produces three morphologically different morphs. The small morph is bacterivorous and characterized by its small body size and slim body and it is found only in the stationary and decline phases of the culture. The large morph has a wide body, larger oral apparatus, and feeds on small eukaryotes such as yeast cells and small ciliates. It divides very quickly and produces the other two morphs and found in the exponential phase of the cultures. The giant morph is characterized by its huge body and oral apparatus. It feeds on the small morph cells of the same species and other ciliates, and occurs together with the small morph. Phylogenetic analyses based on the 18S rRNA gene sequences show that the new species is placed in a sister subclade to that containing other Tetmemena sequences. Moreover, Tetmemena indica Bharti et al., 2019 nov. stat. is raised to species level based on the differences in the cyst morphology and the dorsal ciliature to the authoritative Tetmemena pustulata population.

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Morphology and Morphogenesis of Pseudourostyla levis (Ciliophora, Hypotrichia) from River Yamuna, Delhi, India.

Cited by 2 publications

References 31 publications

Morphology and Morphogenetic description of a new soil ciliate species of Notohymena indica n.sp. from Rithala waste-water treatment plant (WWTP), Delhi, India

Morphology and Morphogenetic description of a new soil ciliate species of Notohymena indica n.sp. from Rithala waste-water treatment plant (WWTP), Delhi, India

Polymorphism, gigantism, and cannibalism, one stylonychid ciliate (Ciliophora, Hypotricha) to rule them all

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