My Journey in Ciliate Systematics1

LYNN, DENIS H.

doi:10.1111/j.1550-7408.1996.tb03988.x

Cited by 27 publications

(16 citation statements)

References 35 publications

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“…Even though our alignment requires one more gap than that of Bernhard and Schlegel (1998), it probably represents the evolution of this gene in eukaryotes more accurately because alanine at position 14 is shared by all ciliates and the gap at position 15 is shared by all nonheterotrichid ciliates. Moreover, our alignment is more compatible with Lynn's (1996b) FIG. 1.…”

Section: Characterization Of the Histone H3/h4 Region In I Multifiliissupporting

confidence: 76%

Characterization of Histone H3/H4 Gene Region and Phylogenetic Affinity of Ichthyophthirius multifiliis Based on H4 DNA Sequence Variation

Bussche

Hoofer

Drew

et al. 2000

Molecular Phylogenetics and Evolution

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Section: Characterization Of the Histone H3/h4 Region In I Multifiliissupporting

confidence: 76%

Characterization of Histone H3/H4 Gene Region and Phylogenetic Affinity of Ichthyophthirius multifiliis Based on H4 DNA Sequence Variation

Bussche

Hoofer

Drew

et al. 2000

Molecular Phylogenetics and Evolution

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“…It would now include only ciliates with a particular structure: the overlapping postciliary microtubular ribbons (see Raikov et al, 1975) and, in forms where macronuclear division occurs, the use of extramacronuclear microtubules (see Raikov, 1982). The other subphylum, named Intramacronucleata by Lynn (1996), would include the remaining classes, the Spirotrichea, Litostomatea, Phyllopharyngea, Nassophorea, Colpodea, Prostomatea, Oligohymenophorea, and a group, probably a new class, that would include Metopus and related ciliates. All taxa in this subphylum use intramacronuclear microtubules during division of the macronucleus.…”

Section: Figmentioning

confidence: 99%

Phylogenetic Relationships between Prostome and Colpodean Ciliates Tested by Small Subunit rRNA Sequences

Stechmann

Schlegel

1998

Molecular Phylogenetics and Evolution

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“…Within the Postciliodesmatophora, the heterotrichs divide their macronucleus with extramacronuclear microtubules, while the karyorelicteans have non-dividing macronuclei [26, 431. Lynn [37] has proposed that the remaining ciliates, united by using intramacronuclear microtubules to divide their macronucleus, should be assigned to the Subphylum Intramacronucleata Lynn, 1996.…”

Section: Discussionmentioning

confidence: 99%

Phylogeny of the Rumen Ciliates Entodinium, Epidinium and Polyplastron (Litostomatea: Entodiniomorphida) Inferred from Small Subunit Ribosomal RNA Sequences

Wright

Dehority

Lynn

1997

J Eukaryotic Microbiology

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102

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ABSTRACT. Three complete 18s ribosomal RNA gene sequences from the rumen ciliates, Entodinium caudatum (1,639 bp), Epidinium caudatum (1,638 bp), and Polyplastron multivesiculatum (1,640 bp) were determined and confirmed in the opposite direction. Trees produced using maximum parsimony and distance-matrix methods (least squares and neighbour-joining), with strong bootstrap support, depict the rumen ciliates as a monophyletic group. Entodinium caudatum is the earliest branching rumen ciliate. However, Entodiniuin simplex does not pair with En. caudatum, but rather with Polyplastron multivesiculatum. Signature sequences for these rumen ciliates reveal that the published SSrRNA gene sequence from En. simplex is in fact a Polyplastron species. The free-living haptorian ciliates, Loxophyllum, Homalozoon and Spathidium (Subclass Haptoria), are monophyletic and are the sister group to the rumen ciliates. The litostomes (Class Litostomatea), consisting of the haptorians and the rumen ciliates, are also a monophyletic group. The rumen ciliates are characterized by generally having: (1) unspecialized oral ciliature, (2) a somatic kinetid that is typically made up of one kinetosome with usually two transverse microtubular ribbons evident only during kinetosomal replication, and ( 3 ) microtubular bundles (nematodesmata) that extend into the cytoplasm from the bases of kinetids that surround the cytostome [38]. At present, there are two major classification schemes for the Phylum Ciliophora, based primarily upon ultrastructural features of the ciliate cortex. For de Puytorac and his collaborators [8-lo], the rumen ciliates entirely comprise the Class Vestibuliferea, with three orders (Trichostomatida, Entodiniomorphida and Blepharocorythida), and are a sister group To whom correspondence should be addressed. Telephone: 519-824-4120, ext. 2975; Fax: 519-767-1656; Email: awright@uoguelph.ca to the Class Litostomatea within the Subphylum Filicorticata.Lynn and his collaborators [38, 48, 491 recognize two orders of rumen ciliates, Vestibuliferida and Entodiniomorphida, within the Subclass Trichostomatia, a sister group to the Subclass Haptoria within the Class Litostomatea. Despite the differences in rank for the rumen ciliates, both schemes are basically quite similar. Molecular data will be useful in testing these proposed relationships.Therefore, we sequenced in both directions the complete small subunit ribosomal RNA (SSrRNA) genes from Entodinium caudatum, Epidinium caudatum, and Polyplastron multivesiculatum and compared these to SSrRNA gene sequences from other ciliates and eukaryotes. Phylogenetic analyses were used to determine (1) if the rumen ciliates form a monophyletic group, (2) if En. caudatum and En. simplex form a clade basal to the other two entodiniomorphids, (3) if the rumen ciliates are the sister group to the free-living haptorian ciliates represented by Homalozoon, Loxophyllum, and Spathidium, and (4) if the Class Litostomatea, to which the rumen ciliates belong, is monophyletic. MATERIALS AND METHODSS...

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My Journey in Ciliate Systematics1

Cited by 27 publications

References 35 publications

Characterization of Histone H3/H4 Gene Region and Phylogenetic Affinity of Ichthyophthirius multifiliis Based on H4 DNA Sequence Variation

Characterization of Histone H3/H4 Gene Region and Phylogenetic Affinity of Ichthyophthirius multifiliis Based on H4 DNA Sequence Variation

Phylogenetic Relationships between Prostome and Colpodean Ciliates Tested by Small Subunit rRNA Sequences

Phylogeny of the Rumen Ciliates Entodinium, Epidinium and Polyplastron (Litostomatea: Entodiniomorphida) Inferred from Small Subunit Ribosomal RNA Sequences

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