Ciliates of solar lake on the red sea shore

Wilbert, Norbert; Kahan, David

doi:10.1016/s0003-9365(81)80004-8

Cited by 68 publications

(44 citation statements)

References 12 publications

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“…-R! REM : Reinvestigation necessary, because neither Patsch (1974) nor Dragesco & Dragesco-erneis, (1986) describe oral cirri, which are characteristic of the marine species of this genus (Wilbert & ahan 1981) . If they are really absent, C. vorticella would need a genus of its own .…”

Section: New Saprobiological Classificationsmentioning

confidence: 99%

Taxonomic and nomenclatural revision of Sl�de?ek's list of ciliates (Protozoa: Ciliophora) as indicators of water quality

Foissner

1988

Hydrobiologia

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A taxonomic and nomenclatural revision of Sladecek's et al. (1981) and Wegl's (1983) lists of ciliates (Protozoa : Ciliophora) as indicators of water quality has been performed . The original reference, important synonyms, and modern taxonomic literature are provided for each of the 378 taxa recognized . The results of this revision are summarized in a table which shows the correct (modern) name, author, and date of publication of each species as well as its saprobity, its saprobic valency, its indicative weight, and its saprobic index .

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Section: New Saprobiological Classificationsmentioning

confidence: 99%

Taxonomic and nomenclatural revision of Sl�de?ek's list of ciliates (Protozoa: Ciliophora) as indicators of water quality

Foissner

1988

Hydrobiologia

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“…Based on the information obtained, we cannot separate the population from Uronema marinum since there are overlaps in many of the characteristics of U. marinum and U. nigricans, and there was no description of the living observation of this population, which is an important basis for differentiating between these two species (see "Morphological comparison of Uronema nigricans with its congeners" section in the "Discussion" and Table 2). We believe that the Red Sea population described by Wilbert and Kahan (1981) was misidentified based on the following: 1) the cell size was relatively smaller than that of other Uronema nigricans populations (20 μm × 12 μm vs. 20-50 μm × 10-25 μm); 2) it possessed a four-rowed M2, diagonally arranged (vs. twoor three-rowed in longitudinal direction); 3) the M3 was almost as large as the M2 (vs. M3 being much shorter than the M2 in other populations); and 4) a unique structure of PM (anterior part in one row and posterior part in a zigzag pattern vs. PM arranged in a zigzag pattern throughout). Therefore, in our opinion the Red Sea population did not represent Uronema nigricans.…”

Section: Discussionmentioning

confidence: 93%

“…Many populations under the name "Uronema nigricans" were redescribed thereafter (Thompson and Evans 1968, Foissner 1971, Agamaliev 1978, Wilbert and Kahan 1981, Dragesco and Dragesco-Kernéis 1986, Song 1991, Foissner et al 1994, Yang et al 2012. Among the descriptions, three populations were collected from brackish water (Thompson and Evans 1968, Agamaliev 1978, Wilbert and Kahan 1981. Since the species in Uronema are usually very small and share many characteristics, misidentification may occur due to the contemporary techniques used and researchers.…”

Section: Discussionmentioning

confidence: 99%

Morphological Redescription and SSU rDNA-based Phylogeny of Two Freshwater Ciliates, Uronema nigricans and Lembadion lucens (Ciliophora, Oligohymenophorea), with Discussion on the Taxonomic Status of Uronemita sinensis

Liu¹,

Li²,

Qu³

et al. 2017

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Abstract. The morphology and phylogeny of two poorly known species, Uronema nigricans (Müller, 1786) Florentin, 1901 and Lembadion lucens (Maskell, 1887) Kahl, 1931, were respectively collected from a eutrophic freshwater river in Shenzhen and an oligotrophic lake in Zhanjiang (both in southern China) and investigated using standard taxonomic methods. The sampled population of Uronema nigricans was characterized by a cell size of 30-40 μm × 12-20 μm in vivo, an elongated elliptical outline with a prominent apical plate, and 13-15 somatic kineties. The sampled population of Lembadion lucens was characterized by a cell size of 45-80 μm × 20-50 μm in vivo, 25-35 somatic kineties, five or six caudal kinetosomes with cilia about 20 μm in length, and a single right-positioned contractile vacuole. The small subunit ribosomal RNA gene (SSU rDNA) of these species was sequenced and compared with those of their congeners to reveal nucleotide differences. The phylogenetic trees showed that the Shenzhen population of Uronema nigricans clusters with two other sequences under the name of "Uronema nigricans" (which are possibly misidentified) and then groups with Uronemita sinensis (Pan et al., 2013) Liu et al., 2016 with full support. Phylogenetic analyses indicated that genus Lembadion is monophyletic with full support provided by both Bayesian inference and maximum likelihood algorithms. Based on analyses of morphological and sequence data, Uronemita sinensis may represent a new genus between Uronema and Uronemita.

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“…Müller 1786;Stein 1859;Wallengren 1900;Young 1922;Mansfeld 1923;Kahl 1932;Wang and Nie 1932;Kirby 1934;Bullington 1940;Kattar 1970;Agamaliev 1971;Borror 1972;Wilbert and Kahan 1981;Valbonesi and Luporini 1990;Carey 1992;Song 1997;Kim and Min 2011). Based on the revision by Curds and Wu (1983) and the redefinition by Song (1999), four morphospecies were considered as valid species in the genus, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…Morphogenetic studies revealed that Uronychia species have an extremely similar developmental pattern of cortical structures and nuclear apparatus (Calkins 1911;Taylor 1928;Wilbert and Kahan 1981;Hill 1990;Wilbert 1995;Song 1996;Shi and Song 1999;Song et al 2004), which do not contribute too much to species separation within the genus.…”

Section: Introductionmentioning

confidence: 99%

Description of a New Brackish Water Ciliate, Uronychia xinjiangensis n. sp. (Ciliophora, Euplotida) Based on Morphology, Morphogenesis and Molecular Phylogeny

Shi

Liu

Wang

et al. 2017

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Abstract.A brackish water euplotid ciliate, Uronychia xinjiangensis n. sp., was discovered in a ditch in Yuli County, Xinjiang, China. Its morphology, ciliature and morphogenesis were investigated based on specimens examined in vivo and following protargol staining. The new species is characterized by the posterior part of the adoral zone composed of three membranelles, which has never been seen in all other known congeners. Other morphologic features include: (i) body oval-shaped, with conspicuous right anterior spur-like protrusion; (ii)size in vivo 60-90 × 40-68 μm; (iii) two macronuclear nodules; (iv) four frontal, two ventral, five transverse, three left marginal and three caudal cirri. Its morphogenesis proceeds in a usual way, except that the oral primordium forms only three proximal membranelles rather than four proximal membranelles within congeners. The small subunit rRNA gene of the new species (GenBank accession number: KX147287) comprises 1723 bp and 44.63% GC content, and differs by 0.12-1.81% from those of congeners. Phylogenetic analyses based on SSU rRNA gene sequence data reveal that Uronychia xinjiangensis n. sp. clusters with other Uronychia species with full support, which supports the monophyly of the genus Uronychia Stein, 1859.

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Ciliates of solar lake on the red sea shore

Cited by 68 publications

References 12 publications

Taxonomic and nomenclatural revision of Sl�de?ek's list of ciliates (Protozoa: Ciliophora) as indicators of water quality

Taxonomic and nomenclatural revision of Sl�de?ek's list of ciliates (Protozoa: Ciliophora) as indicators of water quality

Morphological Redescription and SSU rDNA-based Phylogeny of Two Freshwater Ciliates, Uronema nigricans and Lembadion lucens (Ciliophora, Oligohymenophorea), with Discussion on the Taxonomic Status of Uronemita sinensis

Description of a New Brackish Water Ciliate, Uronychia xinjiangensis n. sp. (Ciliophora, Euplotida) Based on Morphology, Morphogenesis and Molecular Phylogeny

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