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Petalomonas
portrait

Petalomonas (pet-al-owe-moan-ass), rigid heterotrophic (no plastids) euglenid, one emerging flagellum which points in front of the moving cells. The flagellum starts within the flagellar pocket (also called the reservoir) extends through a flagellar canal and out at or near the apex of the cell. Either absorbs soluble food or consumes small particles although no mouth is visible by light microscopy. Most species have longitudinal or slightly spiral ridges or folds. Mode of feeding is not clear. Common in freshwater and marine ecosystems. Differential interference contrast.  This picture was taken by David Patterson, Linda Amaral Zettler and Virginia Edgcomb of materials from sediments of the marine site, Eel Pond in Austumn 2000, spring and summer 2001. Image copyright: D. J. Patterson, L. Amaral-Zettler and V. Edgcomb, image used under license to MBL (micro*scope).

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Petalomonas

From the collection Eel Pond, Woods Hole, Massachusetts

Description of Petalomonas: Sphenomonadine euglenids, colourless, phagotrophic and/or osmotrophic, rigid, fusiform or triangular, flattened cells, usually very flat and leaf-shaped, mostly with strong ribs or keels; no special ingestion organelle visible by light microscopy but some species, at least, have a simple feeding apparatus visible by electron-microscopy; canal opening subapical with one emergent flagellum, directed anteriorly, straight, during swimming; second flagellum non-emergent; paramylon abundant; freshwater and marine, mainly benthic, in mud sediments, cosmopolitan; Scytomonas was purportedly distinguished by having a single flagellum and no reduced second flagellum in the reservoir although a reduced basal body may have been overlooked; cells assigned to Scytomonas have a simple feeding pocket and are known to indulge in sexuality - two cells fuse as isogametes, one flagellum is lost and the zygote swims by means of the other; the gamete nuclei fuse but meiosis and further stages have not been seen, type species P. abscissa (Dujardin, 1841) Stein, 1859.


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    Petalomonas in other collections



    Petalomonas abscissa
    , from Heterotrophic flagellates of marine habitats


    Petalomonas boadicea
    , from Heterotrophic flagellates of marine habitats


    Petalomonas cantuscygni
    , from Heterotrophic flagellates of marine habitats


    Petalomonas carinata
    , from Heterotrophic flagellates of marine habitats


    Petalomonas coxydensis
    , from Heterotrophic flagellates of marine habitats


    Petalomonas excavata
    , from Heterotrophic flagellates of marine habitats


    Petalomonas intortus
    , from Heterotrophic flagellates of marine habitats


    Petalomonas iugosus
    , from Heterotrophic flagellates of marine habitats


    Petalomonas labrum
    , from Heterotrophic flagellates of marine habitats


    Petalomonas marginalis
    , from Heterotrophic flagellates of marine habitats


    Petalomonas micra
    , from Heterotrophic flagellates of marine habitats


    Petalomonas minor
    , from Heterotrophic flagellates of marine habitats


    Petalomonas minuta
    , from Heterotrophic flagellates of marine habitats


    Petalomonas ornata
    , from Heterotrophic flagellates of marine habitats


    Petalomonas phacoides
    , from Heterotrophic flagellates of marine habitats


    Petalomonas planus
    , from Heterotrophic flagellates of marine habitats


    Petalomonas poosilla
    , from Heterotrophic flagellates of marine habitats


    Petalomonas raiula
    , from Heterotrophic flagellates of marine habitats


    Petalomonas spinifera
    , from Heterotrophic flagellates of marine habitats


    Petalomonas virgatus
    , from Heterotrophic flagellates of marine habitats


    Petalomonas involuta
    , from Protozoan biomonitors in China


    Petalomonas mediocanellata
    , from Protozoan biomonitors in China


    Petalomonas pusilla
    , from Protozoan biomonitors in China


    Petalomonas steinii
    , from Protozoan biomonitors in China


    Petalomonas pusilla
    , from Drawings of heterotrophic euglenids


    Petalomonas intortus
    , from Drawings of flagellates


    Petalomonas spinifera
    , from Drawings of flagellates


    Petalomonas virgatus
    , from Drawings of flagellates


    Petalomonas
    , from ATOL protistology workshop 2005


    Petalomonas
    , from Protsville drawings of freshwater protists


    Petalomonas
    , from Little Sippewissett salt marsh, Massachusetts, USA


    Petalomonas poosilla
    , from Little Sippewissett salt marsh, Massachusetts, USA


    Petalomonas
    , from Lamont Pond, freshwater, New York


    Petalomonas
    , from Freshwater microbes - NW Australia


    Petalomonas minuta
    , from Marine euglenids - NW Australia


    Petalomonas pusilla
    , from Marine euglenids - NW Australia


    Petalomonas
    , from Prawn Farm, Queensland, Australia


    Petalomonas
    , from American Type Culture Collection


    Petalomonas
    , from Pitcher Plants, Florida, USA


    Petalomonas
    , from Lake Toolik, Arctic Alaska


    Petalomonas abscissa
    , from Heterotrophic flagellates of Botany Bay, Sydney, Australia


    Petalomonas intortus
    , from Heterotrophic flagellates of Botany Bay, Sydney, Australia


    Petalomonas iugosus
    , from Heterotrophic flagellates of Botany Bay, Sydney, Australia


    Petalomonas labrum
    , from Heterotrophic flagellates of Botany Bay, Sydney, Australia


    Petalomonas marginalis
    , from Heterotrophic flagellates of Botany Bay, Sydney, Australia


    Petalomonas minor
    , from Heterotrophic flagellates of Botany Bay, Sydney, Australia


    Petalomonas minutus
    , from Heterotrophic flagellates of Botany Bay, Sydney, Australia


    Petalomonas planus
    , from Heterotrophic flagellates of Botany Bay, Sydney, Australia


    Petalomonas poosilla
    , from Heterotrophic flagellates of Botany Bay, Sydney, Australia


    Petalomonas raiula
    , from Heterotrophic flagellates of Botany Bay, Sydney, Australia


    Petalomonas spinifera
    , from Heterotrophic flagellates of Botany Bay, Sydney, Australia


    Petalomonas virgatus
    , from Heterotrophic flagellates of Botany Bay, Sydney, Australia


    Petalomonas marginalis
    , from Heterotrophic flagellates of Botany Bay, Sydney, Australia


    Petalomonas
    , from Prawn Farm, Queensland, Australia


    micro*scope - version 6.0 - March, 2006
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