world of amoeboid organisms

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Order Euamoebida Lepşi 1960, emend. Smirnov et al. 2011

Naked amoebae with tubular, subcylindrical pseudopodia (or the entire cell is monopodial and subcylindrical); no alteration of the locomotive form; no adhesive uroidal structures; sorocarpic development in some species

Suborder Amoebina Cavalier-Smith, 2016

  1. Family Amoebidae (Ehrenberg, 1838) Page, 1987(Amoeba, Chaos, Polychaos, Parachaos, Trichamoeba, Deuteramoeba, Hydramoeba)
  2. Family Hartmannellidae Volkonsky, 1931 em. Smirnov et al., 2011(Cashia, Copromyxa, Copromyxella, Glaeseria, Hartmannella, Ptolemeba, Saccamoeba)

Suborder Nolandina Cavalier-Smith, 2016

  1. Family Nolandellidae Cavalier-Smith in Smirnov et al., 2011 (synonym Nolandellidae Lahr and Katz in Lahr et al., 2011) (Nolandella)

The diagrams below show the three morphotypes of locomotive forms of Amoebina:

Lobosea

Smirnov et al. (2011), A Revised Classification of Naked Lobose Amoebae   An excellent guide to the morphology and indentification of naked amoebae is: Smirnov, A. V., Brown, S. (2004): Guide to the study and identification of soil amoebae. Protistology 3:148–190.

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Spiculophrys

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Acanthocystis drakena

From Zlatogursky, 2016 Acanthocystis drakena Zlatogursky, 2016 Diagnosis: Cells are 21.1-30.5 µm (ca. 26.7) in diameter. Cell is covered with oval plate-scales having a margin

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Choanocystis symna

From Zlatogursky, 2014 Choanocystis symna Zlatogursky, 2014 Diagnosis: Cell body ca. 6.7 µm in diameter. Axopodia three–five times longer than a cell diameter. Plate-scales dumbbell-shaped

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Acanthocystis costata

From Zlatogursky, 2014 Acanthocystis costata Zlatogursky, 2014 Diagnosis: Cell body ca 9.5 µm in diameter. Axopodia 2–3 times longer than cell diameter. Length of spine-scales

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Kinetocyst

Left: ultra-structure of a kinetocyst of Raphidiophrys contractilis); right: two kinetocysts in an axopodium. Kinetocysts In centrohelid heliozoa, extrusomes are called kinetocysts, and are present

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Yogsothoth carteri

Yogsothoth carteri, after Shishkin and Zlatogursky, 2018 Yogsothoth carteri Shishkin and Zlatogursky, 2018 Diagnosis: Individual cells in a colony have a diameter of 9.7-15.2 µm;

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