A Unique Euplotid Ciliate, Gastrocirrhus (Protozoa, Ciliophora): Assessment of Its Phylogenetic Position Inferred from the Small Subunit rRNA Gene Sequence

2007 ◽  
Vol 54 (4) ◽  
pp. 371-378 ◽  
Author(s):  
MIAO MIAO ◽  
WEIBO SONG ◽  
ZIGUI CHEN ◽  
KHALED A. S. AL-RASHEID ◽  
CHEN SHAO ◽  
...  
Keyword(s):  
Gene Sequence ◽  
Small Subunit ◽  
Phylogenetic Position ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Small Subunit Rrna ◽  
Small Subunit Rrna Gene ◽  
Protozoa Ciliophora

scholarly journals Morphology, morphogenesis and molecular phylogeny of an oxytrichid ciliate, Rubrioxytricha haematoplasma (Blatterer & Foissner, 1990) Berger, 1999 (Ciliophora, Hypotricha)

2015 ◽  
Vol 65 (Pt_1) ◽  
pp. 309-320 ◽  
Author(s):  
Wenping Chen ◽  
Xumiao Chen ◽  
Lifang Li ◽  
Alan Warren ◽  
Xiaofeng Lin
Keyword(s):  
Gene Sequence ◽  
Staining Method ◽  
Sequence Data ◽  
Small Subunit ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Small Subunit Rrna ◽  
Small Subunit Rrna Gene ◽  
Single Mass ◽  
The Right

The morphology and morphogenesis of an oxytrichid ciliate, Rubrioxytricha haematoplasma (Blatterer & Foissner, 1990) Berger, 1999, collected from brackish and marine waters in China, were investigated using live observation and the protargol staining method. The main features of the morphogenetic process are: (i) the parental adoral zone of membranelles is retained completely in the proter and the anlage of undulating membranes originates from dedifferentiation of the old structures; (ii) three frontal, four frontoventral, one buccal, five ventral and five transverse cirri are derived from the anlagen of the undulating membranes and the five streaks of frontal-ventral-transverse anlagen in the pattern of 1 : 3 : 3 : 3 : 4 : 4 from left to right; (iii) the morphogenesis of the dorsal kineties is simpler than the Oxytricha pattern, i.e. without fragmentation of the dorsal kinety 3 anlagen; (iv) the single caudal cirrus originates from the dorsal kinety 3 anlage on the right side; (v) the two macronuclear nodules fuse into a single mass during the mid-stage of morphogenesis. These features correspond well with Rubrioxytricha indica, indicating that the morphogenetic pattern of Rubrioxytricha is stable. Phylogenetic analysis based on small-subunit rRNA gene sequence data supports the monophyly of the genus Rubrioxytricha, which is nested within the non-Stylonychinae clade.

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.

Sign in / Sign up

Export Citation Format

Share Document