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Topic: Mycetozoa


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In the News (Wed 16 Dec 09)

  
  Mycetozoa - LoveToKnow 1911
He showed that in the Mycetozoa the spore hatches out as a mass of naked protoplasm which almost immediately assumes a free-swimming flagellate form (zoospore), that after multiplying by division this passes into an amoeboid phase, and that from such amoebae the plasmodia arise, though the mode of their origin was not ascertained by him.
The individual sporangia of the Mycetozoa are, for the most part, minute structures, rarely attaining the size of a mustardseed, though, in the composite form of aethalia, they may form cake-like masses an inch or more across (fig.
The species of Mycetozoa are widely distributed over the world in temperate and tropical latitudes where there is sufficient moisture for them to grow, and they must be regarded as not inconsiderable agents in the disintegrating processes of nature, by which complex organic substances are decomposed into simpler and more stable chemical groups.
www.1911encyclopedia.org /Mycetozoa   (5563 words)

  
 MYCETOZOA (Myxomycetes... - Online Information article about MYCETOZOA (Myxomycetes...
numbers of individuals in the amoeboid phase—a mode of origin which is now generally recognized as an essential feature in the conception of a plasmodium, whether as occurring among the Mycetozoa or in other groups (7).
lime are abundant in the plasmodia, and in all Mycetozoa other granules of undetermined nature are present.
Review of the Life-Histories of the Mycetozoa.—The data for a comparison of the life-history of the Mycetozoa with those of other Protozoa in respect of nuclear changes are at present incomplete.
encyclopedia.jrank.org /MOS_NAN/MYCETOZOA_Myxomycetes_Schleimpi.html   (6189 words)

  
 Mycetozoa
The Mycetozoa or Myxomycetes comprise the true slime molds, peculiar protists which take the form of multinucleate amoeboids in the feeding stage but produce sporangia superficially similar to those of fungi.
The spores release small haploid cells, which may take the form of flagellate swarmers or of small amoebae, which fuse together to form a diploid zygote.
Zoologists treated the same organisms as the Mycetozoa (fungus animals).
www.fastload.org /my/Mycetozoa.html   (217 words)

  
 [No title]
Mycetozoa found during the Fungus Foray in the Forres District, Sept. 12th to 20th, 1912, with the description of a new species.
Mycetozoa found during the Fungus Foray in the neighbourhood of Doncaster, Sept. 22nd to 25th, 1914.
Mycetozoa seen during the visit of the British Mycological Society to Shrewsbury, September 24th to 29th, 1917.
www.cybertruffle.org.uk /cyberliber/l/istoob.htm   (3928 words)

  
 PROTOZOA - LoveToKnow Article on PROTOZOA   (Site not responding. Last check: )
In such cases the nuclei may be all of one kind, that is to say, not markedly different in size, structure or function, so far as can be seen; or there may be a pronounced morphological differentiation of the nuclei correlated with a difference of function.
In the Mycetozoa, organisms adapted to a semi-terrestrial life in moist surroundings, the protoplasm is capable, when desiccated, of passing into a tough condition resembling sealingwax, which, when moistened, assumes again its normal appearance and active condition.
Resting phases, analogous to encystment, are seen in the spores of various forms, especially those of parasitic, habit, which are commonly enclosed in tough, resistant envelopes or sporocysts, and enveloped as a protection against change of medium or of host.
43.1911encyclopedia.org /P/PR/PROTOZOA.htm   (10571 words)

  
 Tree of Amoebozoa
The Mycetozoa comprises two distinct groups of “slime molds” — the Myxogastria and Protostelia (Dykstra and Keller 2000).
In some lineages of Mycetozoa the fruiting body is raised over the substratum on a distinct stalk.
The monophyly of Mycetozoa was proposed based on elongation factor 1-alpha gene sequences (Baldauf and Doolittle 1997) but it is not always recovered in SSU rRNA trees (Cavalier-Smith et al.
www.unige.ch /sciences/biologie/biani/msg/Amoeboids/Amoebozoa/Conosea.html   (241 words)

  
 Amoebozoa - Wikipedia, the free encyclopedia
In phylogenies based on rRNA their representatives were separate from other amoebae, and appeared to diverge near the base of eukaryotic evolution, as did most slime molds.
However, revised trees by Cavalier-Smith and Chao in 1996 suggested that the remaining lobosans do form a monophyletic group, and that the archamoebae and Mycetozoa are closely related to it, although the percolozoans are not.
Originally it was divided into the subphyla Conosa, comprising the archamoebae and Mycetozoa, and Lobosa, including the more typical lobose amoebae.
en.wikipedia.org /wiki/Amoebozoa   (814 words)

  
 Kumagusu's drawing of Trichia Myxomycete
The treatise was based largely on the specimens and information sent by Kumagusu since 1906 to Gulielma and her father Arthur, and the author praised Kumagusu's continued exertion using an extreme expression in the inscription at the top of its cover (see the image and transcription below).
Kumagusu's tenacity of and life-long dedication to the research of Myxomycetes are symbolised by this addendum of yet another observation made 16 years after the publication of a treatise which itself had been a testimony of his academic contribution.
Note on terminology: Arthur and Gulielma Listers used a newer term of 'Mycetozoa' (consisting of Greek roots 'fungus' and '(animal) life') according to their supposition that this form of life was much closer to the animals than to the plants in the spectrum between them, and Minakata Kumagusu basically adopted this view.
www.aikis.or.jp /~kumagusu/en/drawing_trichia_e.html   (431 words)

  
 Origin and evolution of the slime molds (Mycetozoa) -- Baldauf and Doolittle 94 (22): 12007 -- Proceedings of the ...
Olive defines the Mycetozoa as consisting of three distinct groups (1).
Besides a relatively broad representation of the animals, fungi, Mycetozoa, and Apicomplexa (Fig.
Placement of the Mycetozoa among the "crown" eukaryotes is consistent with a large body of data on their physiology, biochemistry,
www.pnas.org /cgi/content/full/94/22/12007   (4653 words)

  
 Mycetozoa
The Mycetozoa or Myxomycetes comprise the true slime molds, peculiar protists which take the form of multinucleate amoebae in the feeding stage but produce sporangia superficially similar to those of fungi.
The slime molds were originally considered fungi, and treated under the botanical system of nomenclature as the division Myxomycota or class Myxomycetes (slime fungi).
Sometimes the names Eumycetozoa, etc., are used to distinguish from cellular slime molds.
pedia.newsfilter.co.uk /wikipedia/m/my/mycetozoa.html   (208 words)

  
 Amazon.com: Mycetozoa
The Mycetozoa of North America Based Upon the Specimens in the Herbarium of the New York Botanical Garden by Robert Hagelstein (Hardcover - 1944)
A Monograph of the Mycetozoa (A Descriptive Catalogue of the Species in the Herbarium of the British Museum) by Arthur Lister (Hardcover - 1965)
Marvels of Mycetozoa;: Exploration of a Long Island swamp reveals some of the secrets of the slime molds, dwelling on the borderland between the plant and animal kingdoms by William Crowder (Unknown Binding - 1926)
www.amazon.com /s?ie=UTF8&field-keywords=Mycetozoa&page=1&url=search-alias=aps   (267 words)

  
 Myxozoa - MavicaNET
The Mycetozoa include the cellular (dictyostelid), acellular (myxogastrid), and protostelid slime molds.
However, available molecular data are in disagreement on both the monophyly and phylogenetic position of the group.
Ribosomal RNA trees show the myxogastrid and dictyostelid slime molds as unrelated early branching lineages, but actin and â-tubulin trees place them together as a single coherent (monophyletic) group, closely related to the animal—fungal clade.
www.mavicanet.com /directory/nld/7241.html   (141 words)

  
 UGA GEOL 1122
Slime molds are organisms that exist as single individual independent cells for much of their life cycle but then combine to make a larger organism consisting of multiple cells, or consisting of the matter from multiple cells.
Slime molds were once considered one monophyletic group (i.e., all relatively closely related) within the fungi or perhaps within the protozoa (hence the confusing name Mycetozoa or "fungus animals').
The modern view increasingly favors the idea that there are mutliple kinds of slime molds that are not closely related, and in fact some workers would put those different kinds in different phyla.
www.gly.uga.edu /railsback/1122SlimeMolds.html   (627 words)

  
 Origin and evolution of the slime molds (Mycetozoa)
Mycetozoa share a structurally similar fruiting body consisting of a cellulosic stalk of one to many sterile
Mycetozoa were constrained as monophyletic for PROTML analyses testing the phylogenetic position
Mycetozoa among the “crown” eukaryotes is consistent with a large body of data on their physiology,
www.uprm.edu /biology/profs/betancourtc/evo2.htm   (4239 words)

  
 The Mycetozoa
Our understanding of the phylogenetic relationships among the Mycetozoa or slime molds has changed in the past few years.
A paper by Bauldauf and Doolittle (1998) presents evidence that the slime molds are a monophyletic group and are the sister group to the clade that contains Fungi and Animals.
We will cover three divisions of Mycetozoa, the Dictyosteliomycota, the Acrasiomycota, and the Myxomycota.
www.framingham.edu /faculty/mcarrol/nvfolder/mycetozoa.htm   (269 words)

  
 Biology at York - Staff Pages
We use molecular data to reconstruct deep evolutionary relationship, and use these trees to identify morphological characters that mark the major divergences in the tree of life.
The Mycetozoa (so-called "social amoebas" or "slime moulds") are a large and ancient group of organisms.
One of the intriguing features of Mycetozoa is the fact that they possess a complex life cycle that culminates in the development of a true multicellular fruiting body.
bioltfws1.york.ac.uk /biostaff/staffdetail.php?id=slb   (614 words)

  
 Robert Hagelstein Records
The photographs in his monograph The Mycetozoa of North America, based on the specimens in the herbarium of the New York Botanical Garden, are examples of his mastery of microphotography.
Nathaniel Lord Britton, a member of the Society, invited Hagelstein to participate in the Scientific Survey of Porto Rico and the Virgin Islands.
Hagelstein's attention was captured by the myxomycetes, then known as mycetozoa.
sciweb.nybg.org /science2/libr/finding_guide/hagel2.asp   (1314 words)

  
 Origin and evolution of the slime molds (Mycetozoa) - White Rose Research Online
We have sequenced the elongation factor-1α genes from one member of each division of the Mycetozoa, including Dictyostelium discoideum, for which cDNA sequences were previously available.
With our data there are now three proteins that consistently support a monophyletic Mycetozoa and at least four that place these taxa within the ‘‘crown’’ of the eukaryote tree.
We suggest that ribosomal RNA data should be more closely examined with regard to these questions, and we emphasize the importance of developing multiple sequence data sets.
eprints.whiterose.ac.uk /531   (226 words)

  
 “ú—{•ό`‹ÛŒ¤‹†‰ï@“ú—{‹ß—׏”‘‚Ì•ό`‹Û•¶Œ£W
Nakazawa, R. The rare Mycetozoa Minakatella longifila G. Lister was found in Formosa.
Boedijn, K.B. The Mycetozoa, fungi and lichens of the Krakatau group.
Fraser, L. The Mycetozoa of New South Wales.
henkeikin.org /book3.html   (1079 words)

  
 Low Society
The cellular slime mold Dictyostelium discoideum is a social amoeba belonging to the neglected sixth kingdom of life, the Mycetozoa.
In the labs of Rice University’s Department of Ecology and Evolutionary Biology, this unlikely little creature is fast becoming to social and evolutionary biology what the fruit fly has long been to developmental biology—a model organism with which scientists can pry open nature’s secrets.
Kingdom Mycetozoa is perched in the tree of life somewhere between the Animalia/Fungi group and plants, although it has long been assumed to be more closely related to toadstools than toads.
www.rice.edu /sallyport/2004/winter/features/lowsociety/index.html   (2316 words)

  
 Amoebozoa - Wikivisual
suggested that the remaining lobosans do form a monophyletic group, and that the archamoebae and Mycetozoa are closely related to it, although the percolozoans are not.
Amoebae are difficult to classify, and relationships within the phylum remain confused.
Originally the archamoebae and Mycetozoa were placed in a subphylum Conosa, which receives some support from molecular phylogenies, and the others were placed in a subphylum Lobosa, which is paraphyletic.
en.wikivisual.com /index.php/Amoebozoa   (734 words)

  
 Amoebozoa - Wikpedia   (Site not responding. Last check: )
They also include most slime moulds (Mycetozoa), multinucleate or multicellular forms that produce spores, and are often visible to the unaided eye.
Amoebae do not have many characteristics they can be classified from, and the relationships within the phylum remain confused.
Originally it was divided into the subphyla Lobosa and Conosa, the latter comprising the archamoebae and Mycetozoa, but more recent phylogenies do not support either.
www.bostoncoop.net /~tpryor/wiki/index.php?title=Amoebozoa   (745 words)

  
 Slime Molds of New York State: References
Feest, A. The quantitative ecology of soil mycetozoa.
Hagelstein, R. A critical study of the Mycetozoa of Long Island.
Kawabe, K. Occurrence and distribution of dictyostelid cellular slime molds in the southern Alps of Japan.
www.nybiodiversity.org /summaries/protoctista/slime/references.html   (462 words)

  
 Mycetozoa   (Site not responding. Last check: )
RamicristatesScientific classificationKingdom:ProtistaTaxon:RamicristatesClass:MycetozoaOrdersLiceida[?]Echinosteliida[?]Trichiida[?]Stemonitida[?]Physarida[?]Protosteliida[?]The Mycetozoa or Myxomycetes comprise the true slime molds, peculiar protists which take the form of multinucleate amoeboids in the feeding stage but produce sporangia superficially similar to those of fungi.
All is still licensed under the GNU FDL.
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www.termsdefined.net /my/mycetozoa.html   (374 words)

  
 Protozoa   (Site not responding. Last check: )
Rhizaria and Corticata are informally grouped together with the kingdoms Chromista and Plantae as the bikonts, a major eukaryotic clade supported by concatenated protein trees and by the derived gene fusion involving dihydrofolate reductase and thymidylate synthase that probably occurred at or close to the base of the bikonts.
Amoebozoa comprise Mycetozoa, Archamoebae and Lobosa and may be ancestrally uniciliate and unicentriolar; the relatively few Mycetozoa that are biciliate may have doubled their centrioles independently of bikonts, as their anterior cilia are older.
In contrast, all well-studied bikonts have a pattern of ciliary transformation with a younger anterior cilium.
www.uga.edu /~protozoa/secabs/abstr/int/gb5/gb515.html   (393 words)

  
 Slime Mold - Myxomycetes - Colorado State University Cooperative Extension - Tri River Area
Known as slime mold, these fungi were once considered to be animals due to their creeping phase.
DeBary, one of the founders of mycology, called them Mycetozoa, from the Greek words myketes (fungi), and zoon (animals).
With DeBary's first use of Mycetozoa in 1887, the name continued to be used until the 1970's.
www.colostate.edu /Depts/CoopExt/TRA/PLANTS/slime.html   (835 words)

  
 test
Mycetozoa: One of several types of slime moulds, cytoplasm of trophic form is an acellular syncitium.
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.
Slime moulds: mycetozoa (ramicristates), Fonticula, copromyxids, acrasids (heterolobosea) dictyostelids (centramoebid ramicristates)
microscope.mbl.edu /baypaul/microscope/taxonomy/ellobiopsids/ELLOBS.HTM   (1796 words)

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