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Deuteramoeb mycophaga CCAP 1586/1.

Olympus BH2, DIC
Locomotive forms, crystals and nucleus

Photo: A.Smirnov

Deuteramoeba mycophaga (Pussard, Alabouvette, Lemaitre and Pons, 1980) Page, 1988
CCAP 1586/1

  • Lentgh in locomotion 70-180 mkm (average 110 mkm). Amoebae are polypodial (polytactic), if monopodial (monotactic) cells are pronoucely "clavate" in locomotion. Polytactic amoebae have few well-pronouced pseudopodia. Floating form of radial type; several thick pseudopodia of unequal lenght radiate from irregular central mass of the granuloplasm. Lots of big bypiramidal crystals.

  • Double-walled cysts with well-separated walls. See Page (1988, p. 60) for illustrations.

  • Nucleus spherical, 12-20 mkm in diameter, with single central nucleolus.

  • Surface coat looks like very fine amorphous glycocalyx. Maybe it consists of very fine, irregular filaments that cougulate under fixation. Mitochondrial heteromorphism is not known. Fibrous nuclear lamina presents (Page, 1986).

  • This species is very distinctive due to relatively large size and few well-pronouced pseudopodia that it forms. During initial examination may resemble small Amoeba spp. However, unique nuclear structure among largest amoebids easily distinguish it. TEM of the cell coat and nucleus is preferable for correct identification.

  • This is the same species designated Trichamoeba mycophaga by Chakraborty & Old (1986).

  • Terrestrial, Europe, Australia. Can be maintained in PJ with weat grains and Chilomonas paramecium as a food object.

  • The strain is available from Culture Collection of Algae and Protozoa, CEH Windermere, UK.

  • Basic references for identification:

    • Pussard M., Alabouvette C., Lemaitre I. and Pons R. 1980. Une nouvelle amibe mycophage endogee Cashia mycophaga n sp. (Hartmannellidae, Amoebida). Protistologica 16: 443-451.
    • Chakraborty S. and Old K.M. 1986. Ultrastructure and description of a fungus-feeding amoeba, Trichamoeba mycophaga n.sp. (Amoebidea, Amoebae), from Australia. J. Protozool. 33: 564-569.
    • Page F.C. 1986. The genera and possible relationships of the family Amoebidae, with special attention to comparative ultrastructure. Protistologica. 22: 301-316.
    • Page F.C. 1988. A new key to freshwater and soil gymnamoebae. FBA, Ambleside. 122p.
    • Page F.C. 1991. Nackte Rhizopoda. in: Protozoenfauna, b.2. Gustav Fisher, Stuttgart. 3-172.
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