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  • 1
    Electronic Resource
    Electronic Resource
    Phylogeny of Trichomonads Inferred from Small-Subunit rRNA Sequences (1995)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 42 (1995), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: . Small subunit (16S-like) ribosomal RNA sequences were obtained from representatives of all four families constituting the order Trichomonadida. Comparative sequence analysis revealed that the Trichomonadida are a monophyletic lineage and a deep branch of the eukaryotic tree. Relative to other early divergent eukaryotic assemblages the branching pattern within the Trichomonadida is very shallow. This pattern suggests the Trichomonadida radiated recently, perhaps in conjunction with their animal hosts. From a morphological perspective the Devescovinidae and Calonymphidae are considered more derived than the Monocercomonadidae and Trichomonadidae. Molecular trees inferred by distance, parsimony and likelihood techniques consistently show the Devescovinidae and Calonymphidae are the earliest diverging lineages within the Trichomonadida, however bootstrap values do not strongly support a particular branching order. In an analysis of all known 16S-like ribosomal RNA sequences, the Trichomonadida share most recent common ancestry with unidentified protists from the hindgut of the termite Reticulitermes flavipes. The position of two putative free-living trichomonads in the tree is indicative of derivation from symbionts rather than direct descent from some free-living ancestral trichomonad.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1995.tb01604.x
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  • 2
    Electronic Resource
    Electronic Resource
    The Evolution of the Vahlkampfiidae as Deduced from 16S-like Ribosomal RNA Analysis (1993)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 40 (1993), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: . The amoebae, a phenotypically diverse, paraphyletic group of protists, have been largely neglected by molecular phy-logeneticists. To better understand the evolution of amoebae, we sequenced and analyzed the 16S-like ribosomal RNA genes of three vahlkampfiid amoebae: Paratetramitus jugosus, Tetramitus rostratus and Vahlkampfia lobospinosa. The Vahlkampfiidae lineage is monophyletic, branches early along the eukaryotic line of descent, and is not a close relative of the multicellular amoebae that also reversibly transform from amoebae to flagellates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1993.tb06114.x
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  • 3
    Electronic Resource
    Electronic Resource
    The Giardia genome project database (2000)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 189 (2000), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The Giardia genome project database provides an online resource for Giardia lamblia (WB strain, clone C6) genome sequence information. The database includes edited single-pass reads, the results of BLASTX searches, and details of progress towards sequencing the entire 12 million-bp Giardia genome. Pre-sorted BLASTX results can be retrieved based on keyword searches and BLAST searches of the high throughput Giardia data can be initiated from the web site or through NCBI. Descriptions of the genomic DNA libraries, project protocols and summary statistics are also available. Although the Giardia genome project is ongoing, new sequences are made available on a bi-monthly basis to ensure that researchers have access to information that may assist them in the search for genes and their biological function. The current URL of the Giardia genome project database is .
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2000.tb09242.x
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  • 4
    Electronic Resource
    Electronic Resource
    Universal tree of life (1993)
    [s.l.] : Nature Publishing Group
    Nature 362 (1993), S. 795-795 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] SIR — Phylogenetic comparisons of complete small-subunit ribosomal RNA (rRNA) sequences have changed well-established ideas about early events in the evolution of eukaryotes. Nonetheless, the incongruence of rRNA-based phylogenies with molecular trees derived from elongation factors or ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/362795a0
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  • 5
    Electronic Resource
    Electronic Resource
    Mobilifilum chasei: Morphology and ecology of a spirochete from an intertidal stratified microbial mat community (1990)
    Springer
    Archives of microbiology 153 (1990), S. 422-427 
    Details
    ISSN: 1432-072X
    Keywords: Borrelia burgdorferi ; Intertidal cyanobacterial mats ; Mexican microbes ; Microbial community ecology ; Microbial mats ; Microcoleus ; Mobilifilum ; Spirochaeta ; Spirochete flagella ; Spirochete ultrastructure ; Thiocapsa
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Spirochetes were found in the lower anoxiphototrophic layer of a stratified microbial mat (North Pond, Laguna Figueroa, Baja California, Mexico). Ultrastructural analysis of thin sections of field samples revealed spirochetes approximately 0.25 μm in diameter with 10 or more periplasmic flagella, leading to the interpretation that these spirochetes bear 10 flagellar insertions on each end. Morphometric study showed these free-living spirochetes greatly resemble certain symbiotic ones, i.e., Borrelia and certain termite spirochetes, the transverse sections of which are presented here. The ultrastructure of this spirochete also resembles Hollandina and Diplocalyx (spirochetes symbiotic in arthropods) more than it does Spirochaeta, the well known genus of mud-dwelling spirochetes. The new spirochete was detected in mat material cellected both in 1985 and in 1987. Unique morphology (i.e., conspicuous outer coat of inner membrane, large number of periplasmic flagella) and ecology prompt us to name a new free-living spirochete.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00248421
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