scholarly journals Two new marine ciliates, Euplotes sinicus sp. nov. and Euplotes parabalteatus sp. nov., and a new small subunit rRNA gene sequence of Euplotes rariseta (Ciliophora, Spirotrichea, Euplotida)

2010 ◽  
Vol 60 (5) ◽  
pp. 1241-1251 ◽  
Author(s):  
Jiamei Jiang ◽  
Qianqian Zhang ◽  
Xiaozhong Hu ◽  
Chen Shao ◽  
Khaled A. S. Al-Rasheid ◽  
...  
Keyword(s):  
Phylogenetic Trees ◽  
Sister Group ◽  
Small Subunit ◽  
Phylogenetic Position ◽  
Rrna Gene ◽  
Ssu Rrna ◽  
The Novel ◽  
Small Subunit Rrna ◽  
Small Subunit Rrna Gene ◽  
Phylogenetic Lineages

The morphology, infraciliature and silverline system of two marine Euplotes, Euplotes sinicus sp. nov. and Euplotes parabalteatus sp. nov., isolated from seawater near Qingdao, China, were investigated. E. sinicus is characterized by having conspicuous dorsal ridges, a single marginal cirrus and a silverline system of the double-patella-I type. E. parabalteatus is an extremely small form (only about 35 μm long) with 6–7 dorsal kineties and a silverline system of the double-eurystomus type. Small subunit (SSU) rRNA-based phylogenetic trees were constructed with three different methods and these firmly demonstrated that the novel species represent two distinct phylogenetic lineages within the genus Euplotes, branching as a sister group to all other sequenced congeners. In addition, the SSU rRNA gene of another rare, morphologically similar form, Euplotes rariseta, was sequenced. This revealed the phylogenetic position of E. rariseta to be basal to one of the major groups of Euplotes rather than close to Euplotes nobilii.

scholarly journals Description of Eurystomatella sinica n. gen., n. sp., with establishment of a new family Eurystomatellidae n. fam. (Protista, Ciliophora, Scuticociliatia) and analyses of its phylogeny inferred from sequences of the small-subunit rRNA gene

2010 ◽  
Vol 60 (2) ◽  
pp. 460-468 ◽  
Author(s):  
Miao Miao ◽  
Yangang Wang ◽  
Weibo Song ◽  
John C. Clamp ◽  
Khaled A. S. Al-Rasheid
Keyword(s):  
New Genus ◽  
Phylogenetic Analyses ◽  
Sister Group ◽  
Small Subunit ◽  
Rrna Gene ◽  
Small Subunit Rrna ◽  
New Family ◽  
Small Subunit Rrna Gene ◽  
The Family ◽  
Great Divergence

Recently, an undescribed marine ciliate was isolated from China. Investigation of its morphology and infraciliature revealed it as an undescribed species representing a new genus, Eurystomatella n. gen., the type of the new family Eurystomatellidae n. fam. The new family is defined by close-set, apically positioned oral membranelles and a dominant buccal field that is surrounded by an almost completely circular paroral membrane. The new genus is defined by having a small oral membranelle 1 (M1), bipartite M2 and well-developed M3, a body surface faintly sculptured with a silverline system in a quadrangular, reticulate pattern and a cytostome located at the anterior third of a large buccal field. The type species of the new genus, Eurystomatella sinica n. sp., is a morphologically unique form that is defined mainly by the combination of a conspicuously flattened body, several caudal cilia, extremely long cilia associated with the buccal apparatus and a contractile vacuole located subcaudally. According to phylogenetic analyses of small-subunit (SSU) rRNA gene sequences, Eurystomatella clusters with the genus Cyclidium, as a sister group to the family Pleuronematidae. The great divergence in both buccal and somatic ciliature between Eurystomatella and all other known scuticociliates supports the establishment of a new family for Eurystomatella.

Taxonomy, morphology and molecular systematics of three oligotrich ciliates, including a description of Apostrombidium parakielum spec. nov. (Ciliophora, Oligotrichia)

2013 ◽  
Vol 63 (Pt_3) ◽  
pp. 1179-1191 ◽  
Author(s):  
Wen Song ◽  
Jiamei Li ◽  
Weiwei Liu ◽  
Jiamei Jiang ◽  
Khaled A. S. Al- Rasheid ◽  
...  
Keyword(s):  
Sequence Data ◽  
Novel Species ◽  
Small Subunit ◽  
Rrna Gene ◽  
Ssu Rrna ◽  
The Novel ◽  
Small Subunit Rrna ◽  
Ssu Rrna Gene ◽  
Single Clade ◽  
Ssu Rrna Gene Sequence

Three oligotrich ciliates, Apostrombidium parakielum spec. nov., Novistrombidium apsheronicum (Alekperov & Asadullayeva, 1997) Agatha, 2003 and Novistrombidium testaceum (Anigstein, 1914) Song & Bradbury, 1998 were collected from the coastal waters of China and their morphology and small-subunit rRNA (SSU rRNA) gene sequences were studied. The novel species can be recognized by the combination of its obconical body shape, 14–16 anterior and 6–8 ventral membranelles, somatic kinety in three parts and conspicuously long dorsal cilia. Based on the data obtained for this novel species, an improved diagnosis of the genus Apostrombidium is supplied. Descriptions of the population of N. apsheronicum and N. testaceum collected in this study are also provided and compared with the existing descriptions. In addition, the phylogenetic positions of these three species are inferred from their SSU rRNA gene sequence data. The results indicate that the genus Apostrombidium, the systematics of which has not previously been discussed using molecular information, clusters with Varistrombidium kielum and Omegastrombidium elegans, whereas N. testaceum and N. apsheronicum form a single clade.

Redescriptions of three trachelocercid ciliates (Protista, Ciliophora, Karyorelictea), with notes on their phylogeny based on small subunit rRNA gene sequences

2013 ◽  
Vol 63 (Pt_9) ◽  
pp. 3506-3514 ◽  
Author(s):  
Ying Yan ◽  
Yuan Xu ◽  
Zhenzhen Yi ◽  
Alan Warren
Keyword(s):  
Sequence Data ◽  
Phylogenetic Analyses ◽  
Small Subunit ◽  
Rrna Genes ◽  
Rrna Gene ◽  
Ssu Rrna ◽  
Small Subunit Rrna ◽  
Small Subunit Rrna Gene ◽  
Ssu Rrna Gene Sequence ◽  
First Time

Three trachelocercid ciliates, Kovalevaia sulcata (Kovaleva, 1966) Foissner, 1997, Trachelocerca sagitta (Müller, 1786) Ehrenberg, 1840 and Trachelocerca ditis (Wright, 1982) Foissner, 1996, isolated from two coastal habitats at Qingdao, China, were investigated using live observation and silver impregnation methods. Data on their infraciliature and morphology are supplied. The small subunit rRNA (SSU rRNA) genes of K. sulcata and Trachelocerca sagitta were sequenced for the first time. Phylogenetic analyses based on SSU rRNA gene sequence data indicate that both organisms, and the previously sequenced Trachelocerca ditis, are located within the trachelocercid assemblage and that K. sulcata is sister to an unidentified taxon forming a clade that is basal to the core trachelocercids.

Levipalatum texanum n. gen., n. sp. (Nematoda: Diplogastridae), an androdioecious species from the south-eastern USA

Nematology ◽  
2014 ◽  
Vol 16 (6) ◽  
pp. 695-709 ◽  
Author(s):  
Erik J. Ragsdale ◽  
Erik J. Ragsdale ◽  
Natsumi Kanzaki ◽  
Erik J. Ragsdale ◽  
Natsumi Kanzaki ◽  
...  
Keyword(s):  
New Species ◽  
Model Organism ◽  
Sister Group ◽  
Small Subunit ◽  
Phylogenetic Position ◽  
Rrna Gene ◽  
Small Subunit Rrna ◽  
Protein Coding ◽  
Eastern Usa ◽  
A New Species

A new species of diplogastrid nematode, Levipalatum texanum n. gen., n. sp., was isolated from scarab beetles (Coleoptera: Scarabaeidae) in Texas and baited from soil in Virginia, USA. Levipalatum n. gen. is circumscribed by stomatal and pharyngeal morphology, namely a long, hooked dorsal tooth connected to a ‘palate’ projecting anteriad and mediad, subventral telostegostomatal ridges of denticles, and the dorsal radius of the pharynx bulging anteriad. The males of the new species are distinguished from most other Diplogastridae by the frequent presence of ten pairs of genital papillae. Phylogenetic relationships inferred from 11 ribosomal protein-coding genes and a fragment of the small subunit rRNA gene strongly support L. texanum n. gen., n. sp. to be a sister group to Rhabditolaimus, which lacks all the stegostomatal and pharyngeal characters diagnosing the new genus. The new species expands comparative studies of the radiation of feeding morphology that are anchored on the model organism Pristionchus pacificus. The phylogenetic position of L. texanum n. gen., n. sp. indicates a new case of convergent evolution of hermaphroditism in Diplogastridae.

scholarly journals Characterization of two urostylid ciliates, Metaurostylopsis flavicana spec. nov. and Tunicothrix wilberti (Lin & Song, 2004) Xu et al., 2006 (Ciliophora, Stichotrichia), from a mangrove nature protection area in China

2011 ◽  
Vol 61 (7) ◽  
pp. 1740-1750 ◽  
Author(s):  
Yangang Wang ◽  
Xiaozhong Hu ◽  
Jie Huang ◽  
Khaled A. S. Al-Rasheid ◽  
Alan Warren
Keyword(s):  
Phylogenetic Trees ◽  
Small Subunit ◽  
The Body ◽  
Rrna Gene ◽  
Small Subunit Rrna ◽  
Cortical Granules ◽  
Nature Protection ◽  
Small Subunit Rrna Gene ◽  
Protection Area

Two marine stichotrich ciliates, Metaurostylopsis flavicana spec. nov. and Tunicothrix wilberti (Lin & Song, 2004) Xu et al., 2006, isolated from the Shenzhen Mangrove Protection Area on the coast of the South China Sea, were investigated using live observation and protargol impregnation techniques. Metaurostylopsis flavicana is characterized by its elongate body shape, yellowish body colour and bright-yellow cortical granules that are either grouped around the cirri and the dorsal cilia or aligned between the rows of cirri and dorsal cilia. It has four to eight frontal, two frontoterminal, one buccal and seven to ten transverse cirri, a mid-ventral complex comprising 13–17 midventral cirral pairs in a row that extends about three-fifths of the body length, four left and three right marginal rows and three complete dorsal kineties. The small subunit rRNA gene of this species was sequenced and phylogenetic trees were constructed in which M. flavicana does not group with its congeners, suggesting that the genus Metaurostylopsis is paraphyletic. Some supplementary morphological and morphogenetic traits for Tunicothrix wilberti are also documented.

Morphology and molecular phylogeny of four Frontonia species from Turkey (Protista, Ciliophora)

Zootaxa ◽  
2019 ◽  
Vol 4609 (3) ◽  
pp. 548
Author(s):  
SIBEL KIZILDAG ◽  
ISMAIL YILDIZ
Keyword(s):  
Phylogenetic Trees ◽  
Turkish Population ◽  
Small Subunit ◽  
The Other ◽  
Aquatic Environments ◽  
Rrna Gene ◽  
Small Subunit Rrna ◽  
Small Subunit Rrna Gene ◽  
The Family ◽  
Systematic Relationships

In this study, Frontonia leucas, Frontonia acuminata, Frontonia angusta, and Frontonia anatolica species isolated from aquatic environments of Van in Turkey were investigated in detail using morphological, morphometrical, and molecular methods. Although there were minor differences, the Frontonia populations were morphologically similar to the other previously reported populations of the 4 species. Frontonia leucas differed from the other populations by the following combination of characters: about 200 somatic and only 3 vestibular kineties, and a single micronucleus. The Turkish population of Frontonia acuminata had just 4 vestibular kineties and the large micronucleus was always located to the anterior of the carrot-shaped macronucleus. The ratio of the oral apparey size to the cell size of Frontonia angusta in this study was about 18%, with 3 vestibular kineties, and 1 excretory pore. Phylogenetic trees based on small-subunit rRNA gene sequences were constructed using Bayesian inference and maximum-likelihood. Frontonia anatolica was more closely related to Apofrontonia dohrni and Paramecium spp. than to its congeners, while F. acuminata, like F. terricola, was also more closely related to the family Stokesiidae. The results indicated that Frontonia is a non-monophyletic genus consisting of 3 groups. We presented the systematic relationships of the genera and families of Peniculida with new data of genus Frontonia herein. 

Two novel marine Frontonia species, Frontonia mengi spec. nov. and Frontonia magna spec. nov. (Protozoa; Ciliophora), with notes on their phylogeny based on small-subunit rRNA gene sequence data

2011 ◽  
Vol 61 (6) ◽  
pp. 1476-1486 ◽  
Author(s):  
Xinpeng Fan ◽  
Xiangrui Chen ◽  
Weibo Song ◽  
Khaled A. S. Al-Rasheid ◽  
Alan Warren
Keyword(s):  
Phylogenetic Trees ◽  
Gene Sequence ◽  
Sequence Data ◽  
Southern China ◽  
Small Subunit ◽  
Width Ratio ◽  
Rrna Gene ◽  
Small Subunit Rrna ◽  
Small Subunit Rrna Gene ◽  
Protozoa Ciliophora

The morphology and infraciliature of two novel marine ciliates, Frontonia mengi spec. nov. and Frontonia magna spec. nov., isolated from coastal waters in northern and southern China, respectively, were investigated using living observation and silver impregnation methods. Frontonia mengi spec. nov. is characterized by its slender body shape, with a length-to-width ratio of about 5 : 1, about 52 somatic kineties and the structure of its buccal apparatus. Frontonia magna spec. nov. can be recognized by the combination of huge body size, about 200 somatic kineties, five or six vestibular kineties and four-rowed peniculi 1–3. Phylogenetic trees based on small-subunit rRNA gene sequences were constructed by means of Bayesian inference and maximum-parsimony. Results showed that F. mengi and F. magna are sister to each other within the ‘core’ clade of Frontonia that also includes Frontonia lynni and Frontonia tchibisovae and that the genus Frontonia may be polyphyletic, because one species, Frontonia didieri, always groups with Paramecium and Apofrontonia.

Conqueria laevis gen. and sp. nov., a new soft-walled, monothalamous foraminiferan from the deep Weddell Sea

2004 ◽  
Vol 84 (5) ◽  
pp. 919-924 ◽  
Author(s):  
Andrew J. Gooday ◽  
Jan Pawlowski
Keyword(s):  
Phylogenetic Analyses ◽  
Sister Group ◽  
Small Subunit ◽  
Weddell Sea ◽  
Rrna Gene ◽  
Small Subunit Rrna ◽  
Short Neck ◽  
Small Subunit Rrna Gene ◽  
Molecular Phylogenetic ◽  
Cylindrical Test

Conqueria laevis gen. and sp. nov., a new monothalamous agglutinated foraminiferan, is described from core samples collected in the abyssal western Weddell Sea. The species is characterized by a very elongate, almost cylindrical test that usually follows a more or less curved course and has a single terminal aperture located at the end of a short neck. The wall has a very smooth outer surface and is composed of tiny (<5 μm) agglutinated particles. Very similar and presumably congeneric morphotypes occur at northern hemisphere sites, including Arctic fjords around Svalbard and the Porcupine Abyssal Plain. Molecular phylogenetic analyses, based on small subunit rRNA gene sequences, indicate that the new Weddell Sea species forms an independent lineage branching among monothalamous foraminiferans as a sister group to the clade of Psammophaga.

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