...The Ramicristates are a large group of amoeboidprotists, including most forms with lobose and filose pseudopods....in some other amoeboid groups.
In these, the outer cytoplasm forms a distinct layer called the ectoplasm, which is generally clear in contrast to the inner cytoplasm or endoplasm, which is generally granular.
Ramicristates - most lobose and filose forms, including most slime mold groups
Most move by the cell mass flowing into an anterior pseudopod, of which there may be one or several, but some crawl using relatively permanent pseudopods to support the cell like limbs, and others roll, the ectoplasm sliding around the outside of the cell like a tank tread.
The vast majority of lobose and filose amoebae, including Amoeba itself, appear to form a monophyletic group called the ramicristates.
These include both naked forms and ones which produce simple shells, as well as most slime molds, multinucleate or multicellular forms of macroscopic size.
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There is some evidence that the amoebozoans are monophyletic, but their classification and relationships remain uncertain.
Patterson united them with the testate filose amoeboids as the ramicristates, based on the common presence of mitochondria with branching tubular cristae.
However, genetic studies include the amitochondriate pelobionts and entamoebae and remove the testate lobose amoeboids to the Cercozoa.
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Ramicristates: New grouping for amoebae with branching mitochondrial cristae, includes euamoebae (naked gymnamoebae), centramoebae (stereomyxids, dictyostelid slime moulds, acanthamoebaeEumycetozoan slime moulds including the Mycetozoa, protostelids and Hyperamoeba), Gromia, trichosids (Trichosphaerium = Pontifex), lobose and filose testate amoebae.
Red algae: mostly multicellular algae with phycobilin rich plastids providing generally a pink or red colour.
Several explicit assumptions of monophyly were made for operational taxonomic units identified by protein and rDNA sequence analyses and morphology (Appendix 1).
Some of these units, which include the alveolates, cercozoans, cryptomonads, euglenozoans (plus heteroloboseans), haptophytes, and ramicristates (see Patterson, 1999), encompass superphyla.
Because the hyphochytrids within the stramenopiles have a nuclear cap of clumped ribosomes found elsewhere only in chytrids (Lange and Olson, 1979), they, along with slabrynthulids and bicosoecids, were considered separately from the stramenochromes (plus oomycetes) (Appendix 1).
As with other protists, details of nuclear division profiles, mitochondria, extrusomes and other inclusions have helped to establish the identities for categories of amoebae - especially the heliozoa and radiolaria.
The ramicristates are a major subset of amoeboid organisms distinguished by having branched cristae within the mitochondria.
Life cycle: amoebae typically grow and divide; this pattern of vegetative growth may or may not include encysted states, flagellated forms, or a transition from a sexual to an asexual phase of growth.
Amoebozoa Article, Amoebozoa Information(Site not responding. Last check: 2007-09-17)
Patterson united themwith the testate filose amoeboids as the ramicristates, based on the common presence of mitochondria with branching tubular cristae.
However, genetic studies include the amitochondriate pelobionts and entamoebae and remove thetestate lobose amoeboids to the Cercozoa.
Phylogeny of Lobose Amoebae Based on Actin and Small-Subunit Ribosomal RNA Genes.
Some workers have symptoms like those of hay fever and the...
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Discover Life's encyclopedia page about the biology, natural history, ecology, identification and distribution of Ramicristates: Eumycetozoa - Slime molds,...
They are most prevalent following prolonged periods of leaf wetness and may be obs.
Discover Life - Ramicristates: Eumycetozoa - s, True Discover Life's encyclopedia page about the biology, natural history, ecology, identification and distribution of Ramicristates: Eumycetozoa - s,
They are not molds Molds are fungi.Fuligo septica, the dog vomit Governent repossesions, fruiting bodies Fatman pizza azs of solitary,
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Ramicristates) - Nephridiophagids D Preaxostyla (Excavates) 9 Mycetozoa (Ramicristates) Excavate Glade 1 (Excavates) Figure 1.2 Phylogeny of eukaryotic small subunit ribosomal RNA genes.
Key Phrases in this book: Nucleic Acids Res, Van de Peer, Genome Res, Trends Genet, Sanger Institute, Wellcome Trust, microsporidian genomes, cuniculi genome, chromalveolate plastids, intracellular gene transfer, chromalveolate hypothesis, endosymbiotic gene transfer (See more)
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affinity with Ramicristates / Amoebozoa, but support is weak (Cavalier-Smithet al.
Pseudospora: Heterotrophic protists that typically attack plant cells.
