Search

Your search keyword '"TINTINNIDA"' showing total 3 results
Start Over Descriptor "TINTINNIDA" Publisher wiley
3 results on '"TINTINNIDA"'

1. Past President's Address: Protists of the Mesopelagic and a Bit on the Long Path to the Deep Sea.

Author

Dolan JR, Ciobanu M, and Coppola L

Subjects
Biodiversity, Ecosystem, Mediterranean Sea, Population Dynamics, Seasons, Cercozoa isolation & purification, Ciliophora isolation & purification, Dinoflagellida isolation & purification, Seawater parasitology
Abstract

The deep sea has long been a mysterious and attractive habitat for protistologists. However, logistical difficulties severely limit sampling opportunities. Consequently, our knowledge of the protists in the deep sea, (arguably the largest habitat on earth), is relatively sparse. Here, we present a unique time-series concerning three different protist taxa that share only the characteristics of being relatively large, robust to sampling, and easily identifiable to species level using light microscopy: tintinnid ciliates, phaeogromid cercozoans (e.g. Challengerids) and amphisolenid dinoflagellates. We sampled a near-shore deep water site in the N.W. Mediterranean Sea at 250 m depth over a 2-yr period at approximately weekly intervals from January 2017 to December 2018. To our knowledge, no previous studies have employed sampling on a similar time scale. We found taxa that appear to be restricted to deep waters, distinct seasonal patterns of abundance in some taxa, and in others nonseasonal successional patterns. Based on data from sampling following a flash flood event, the Challengerid population appeared to respond positively to a pulse of terrigenous input. Some of the distinct mesopelagic tintinnid ciliates and amphisolinid dinoflagellates were also found in two samples from the North Atlantic mesopelagic gathered from near the Azores Islands in September 2018. We conclude that there are a variety of protist taxa endemic to the mesopelagic, that the populations are dynamic, and they may be widely distributed in the deep waters of the world ocean., (© 2019 International Society of Protistologists.)

Published
2019
Full Text
View/download PDF

2. Dartintinnus alderae n. g., n. sp., a Brackish Water Tintinnid (Ciliophora, Spirotrichea) with Dual-ended Lorica Collapsibility.

Author

Smith SA, Song W, Gavrilova NA, Kurilov AV, Liu W, McManus GB, and Santoferrara LF

Subjects
Cilia physiology, Ciliophora isolation & purification, Connecticut, DNA, Protozoan genetics, DNA, Ribosomal genetics, Phylogeny, RNA, Protozoan genetics, RNA, Ribosomal genetics, Ribosome Subunits, Small genetics, Saline Waters, Sequence Analysis, DNA, Silver Proteins pharmacology, Staining and Labeling, Ciliophora classification, Ciliophora genetics, Rivers parasitology
Abstract

A tintinnid ciliate isolated from waters of the Thames River (Connecticut, USA) is described through combined in vivo observation, protargol impregnation, and phylogenetic analysis. The novel genus Dartintinnus and its type species, D. alderae are distinct from established tintinnid taxa by a lorica that collapses on both anterior and posterior ends. Dartintinnus is placed in the family Eutintinnidae based on a hyaline, elongated lorica opened at both ends, a ciliary pattern including a ventral kinety, at least one dorsal kinety, and right, left and lateral fields, and a sister relationship with Eutintinnus in gene trees. Main differences between D. alderae and Eutintinnus species include a 5.5-6.5% divergence in the small subunit rRNA gene, the geometry of the lorica (resembling an isosceles tetrahedron when collapsed vs. a cylinder, respectively), the number of macronuclear nodules (two vs. four), and the number of dorsal kineties (one vs. usually two). Considering the features of the new genus, we improve the diagnosis of the family Eutintinnidae, including the presence of a lateral ciliary field that had been overlooked in some Eutintinnus species. This work exemplifies the potential for novel diversity, even in these relatively well-studied protists, and the importance of an integrated approach for the description of tintinnid taxa., (© 2017 The Author(s) Journal of Eukaryotic Microbiology © 2017 International Society of Protistologists.)

Published
2018
Full Text
View/download PDF

3. Morphological and ribosomal DNA-based characterization of six Antarctic ciliate morphospecies from the Amundsen Sea with phylogenetic analyses.

Author

Kim SY, Choi JK, Dolan JR, Shin HC, Lee S, and Yang EJ

Subjects
Antarctic Regions, Ciliophora cytology, Ciliophora genetics, Cluster Analysis, DNA, Protozoan chemistry, DNA, Protozoan genetics, DNA, Ribosomal chemistry, DNA, Ribosomal genetics, DNA, Ribosomal Spacer chemistry, DNA, Ribosomal Spacer genetics, Genes, rRNA, Microscopy, Molecular Sequence Data, Phylogeny, RNA, Protozoan genetics, RNA, Ribosomal, 18S genetics, RNA, Ribosomal, 5.8S genetics, Sequence Analysis, DNA, Ciliophora classification, Ciliophora isolation & purification, Seawater parasitology
Abstract

We characterized six tintinnid ciliates from Antarctic waters using molecular markers and morphological traits: Amphorellopsis quinquealata, Codonellopsis gaussi, Cymatocylis convallaria, Cy. calyciformis, Cy. drygalskii, and Laackmanniella prolongata. The 100% similarity in SSU-ITS1-5.8S rDNA-ITS2-partial LSU rDNA sequences among Cy. convallaria, Cy. calyciformis, and Cy. drygalskii is supportive of synonymy. Codonellopsis gaussi and L. prolongata also showed high levels of similarity in SSU rDNA (99.83%) and the D2 domain of LSU rDNA (95.77%), suggesting that they are closely related. Phylogenetic analysis placed Cymatocylis in the Rhabdonellidae, Amphorellopsis in the Tintinnidae and L. prolongata/Co. gaussi within the Dictyocystidae., (© 2013 The Author(s) Journal of Eukaryotic Microbiology © 2013 International Society of Protistologists.)

Published
2013
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results