Bioindicator role of tintinnid (Protozoa: Ciliophora) for water quality monitoring in Kalpakkam, Tamil Nadu, south east coast of India

Rakshit, Dibyendu; Sahu, Gouri; Mohanty, A. K.; Satpathy, K.K.; Jonathan, M.P.; Murugan, K.; Sarkar, Santosh Kumar

doi:10.1016/j.marpolbul.2016.08.058

Cited by 27 publications

(10 citation statements)

References 36 publications

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“…In particular, tintinnine ciliates are conspicuous due to the diversity of loricae produced by their cell propers. Tintinnines have been of great interest in the field of protistology because they (i) display distinct patterns of diversity and biogeography [6] [7]; (ii) serve as bioindicators of water quality and hydrological circulation [8][9] [10] [11]; (iii) are prey for fish larvae and other small metazoans [12] [13]; and (iv) can leave fossilized loricae that are useful in evolutionary studies [14] [15].…”

Section: Introductionmentioning

confidence: 99%

Three Redescriptions in Tintinnopsis (Protista ：Ciliophora: Tintinnina) from Coastal Waters of China, with Cytology and Phylogenetic Analyses Based on Ribosomal RNA Genes

Bai

Wang

Song

et al. 2020

Preprint

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Background: The taxonomy of tintinnine ciliates is vastly unresolved because it has traditionally been based on the lorica (a secreted shell) and it has only recently incorporated cytological and molecular information. Tintinnopsis, the most speciose tintinnine genus, is also the most problematic: it is known to be non-monophyletic, but it cannot be revised until more of its species are studied with modern methods.Results: Here, T. hemispiralis Yin, 1956, T. kiaochowensis Yin, 1956, and T. uruguayensis Balech, 1948, from coastal waters of China, were studied. Lorica and cell features were morphometrically investigated in living and protargol-stained specimens, and sequences of three ribosomal RNA (rRNA) genes were phylogenetically analyzed. The three species show a complex ciliary pattern (with ventral, dorsal, and posterior kineties and right, left, and lateral ciliary fields), but differ in lorica morphology, details of the somatic ciliature and rRNA gene sequences. Tintinnopsis hemispiralis is further distinguished by a ciliary tuft (a ribbon of very long cilia originating from the middle portion of the ventral kinety and extending out of the lorica) and multiple macronuclear nodules. Both T. kiaochowensis and T. uruguayensis have two macronuclear nodules, but differ in the number of somatic kineties and the position of the posterior kinety. Two neotypes are fixed for T. hemispiralis and T. kiaochowensis to stabilize the species names objectively, mainly because of the previous unavailability of type materials. By phylogenetic analysis and comparison with closely-related species, we infer that the ciliary tuft and details such as the commencement of the rightmost kinety in the lateral ciliary field are synapomorphies that may help clarify the systematics of Tintinnopsis-like taxa.Conclusion: The redescriptions of three poorly known Tintinnopsis species, namely T. hemispiralis, T. kiaochowensis, and T. uruguayensis firstly revealed their ciliary pattern and rRNA sequences. This study expands knowledge and database of tintinnines and helps in identifying potential synapomorphies for future taxonomic rearrangements.

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Section: Introductionmentioning

confidence: 99%

Three Redescriptions in Tintinnopsis (Protista ：Ciliophora: Tintinnina) from Coastal Waters of China, with Cytology and Phylogenetic Analyses Based on Ribosomal RNA Genes

Bai

Wang

Song

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…In particular, tintinnine ciliates are conspicuous due to the diversity of loricae produced by their cell propers. Tintinnines have been of great interest in the field of protistology because they (i) display distinct patterns of diversity and biogeography [6,7]; (ii) serve as bioindicators of water quality and hydrological circulation [8][9][10][11]; (iii) are prey for fish larvae and other small metazoans [12,13]; and (iv) can leave fossilized loricae that are useful in evolutionary studies [14,15].…”

Section: Introductionmentioning

confidence: 99%

Three redescriptions in Tintinnopsis (Protista: Ciliophora: Tintinnina) from coastal waters of China, with cytology and phylogenetic analyses based on ribosomal RNA genes

et al. 2020

View full text Add to dashboard Cite

Background The taxonomy of tintinnine ciliates is vastly unresolved because it has traditionally been based on the lorica (a secreted shell) and it has only recently incorporated cytological and molecular information. Tintinnopsis, the most speciose tintinnine genus, is also the most problematic: it is known to be non-monophyletic, but it cannot be revised until more of its species are studied with modern methods. Results Here, T. hemispiralis Yin, 1956, T. kiaochowensis Yin, 1956, and T. uruguayensis Balech, 1948, from coastal waters of China, were studied. Lorica and cell features were morphometrically investigated in living and protargol-stained specimens, and sequences of three ribosomal RNA (rRNA) loci were phylogenetically analyzed. The three species show a complex ciliary pattern (with ventral, dorsal, and posterior kineties and right, left, and lateral ciliary fields), but differ in lorica morphology, details of the somatic ciliature and rRNA gene sequences. Tintinnopsis hemispiralis is further distinguished by a ciliary tuft (a ribbon of very long cilia originated from the middle portion of the ventral kinety and extending out of the lorica) and multiple macronuclear nodules. Both T. kiaochowensis and T. uruguayensis have two macronuclear nodules, but differ in the number of somatic kineties and the position of the posterior kinety. Two neotypes are fixed for T. hemispiralis and T. kiaochowensis to stabilize the species names objectively, mainly because of the previous unavailability of type materials. By phylogenetic analysis and comparison with closely-related species, we infer that the ciliary tuft and details such as the commencement of the rightmost kinety in the lateral ciliary field are synapomorphies that may help clarify the systematics of Tintinnopsis-like taxa. Conclusion The redescriptions of three poorly known Tintinnopsis species, namely T. hemispiralis, T. kiaochowensis, and T. uruguayensis firstly revealed their ciliary patterns and rRNA sequences. This study expands knowledge and database of tintinnines and helps in identifying potential synapomorphies for future taxonomic rearrangements.

show abstract

“…Tintinnines have been of great interest in the eld of protistology because they (i) display distinct patterns of diversity and biogeography [6] [7]; (ii) serve as bioindicators of water quality and hydrological circulation [8][9] [10] [11]; (iii) are prey for sh larvae and other small metazoans [12] [13]; and (iv) can leave fossilized loricae that are useful in evolutionary studies [14] [15].…”

Section: Introductionmentioning

confidence: 99%

Three redescriptions in Tintinnopsis (Protista：Ciliophora: Tintinnina) from coastal waters of China, with cytology and phylogenetic analyses based on ribosomal RNA genes

Bai

Wang

Song

et al. 2020

Preprint

View full text Add to dashboard Cite

Background: The taxonomy of tintinnine ciliates is vastly unresolved because it has traditionally been based on the lorica (a secreted shell) and it has only recently incorporated cytological and molecular information. Tintinnopsis, the most speciose tintinnine genus, is also the most problematic: it is known to be non-monophyletic, but it cannot be revised until more of its species are studied with modern methods. Results: Here, T. hemispiralis Yin, 1956, T. kiaochowensis Yin, 1956, and T. uruguayensis Balech, 1948, from coastal waters of China, were studied. Lorica and cell features were morphometrically investigated in living and protargol-stained specimens, and sequences of three ribosomal RNA (rRNA) loci were phylogenetically analyzed. The three species show a complex ciliary pattern (with ventral, dorsal, and posterior kineties and right, left, and lateral ciliary fields), but differ in lorica morphology, details of the somatic ciliature and rRNA gene sequences. Tintinnopsis hemispiralis is further distinguished by a ciliary tuft (a ribbon of very long cilia originating from the middle portion of the ventral kinety and extending out of the lorica) and multiple macronuclear nodules. Both T. kiaochowensis and T. uruguayensis have two macronuclear nodules, but differ in the number of somatic kineties and the position of the posterior kinety. Two neotypes are fixed for T. hemispiralis and T. kiaochowensis to stabilize the species names objectively, mainly because of the previous unavailability of type materials. By phylogenetic analysis and comparison with closely-related species, we infer that the ciliary tuft and details such as the commencement of the rightmost kinety in the lateral ciliary field are synapomorphies that may help clarify the systematics of Tintinnopsis-like taxa. Conclusion: The redescriptions of three poorly known Tintinnopsis species, namely T. hemispiralis, T. kiaochowensis, and T. uruguayensis firstly revealed their ciliary pattern and rRNA sequences. This study expands knowledge and database of tintinnines and helps in identifying potential synapomorphies for future taxonomic rearrangements.

show abstract

Bioindicator role of tintinnid (Protozoa: Ciliophora) for water quality monitoring in Kalpakkam, Tamil Nadu, south east coast of India

Cited by 27 publications

References 36 publications

Three Redescriptions in Tintinnopsis (Protista ：Ciliophora: Tintinnina) from Coastal Waters of China, with Cytology and Phylogenetic Analyses Based on Ribosomal RNA Genes

Three Redescriptions in Tintinnopsis (Protista ：Ciliophora: Tintinnina) from Coastal Waters of China, with Cytology and Phylogenetic Analyses Based on Ribosomal RNA Genes

Three redescriptions in Tintinnopsis (Protista: Ciliophora: Tintinnina) from coastal waters of China, with cytology and phylogenetic analyses based on ribosomal RNA genes

Three redescriptions in Tintinnopsis (Protista：Ciliophora: Tintinnina) from coastal waters of China, with cytology and phylogenetic analyses based on ribosomal RNA genes

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