Vannellidae

The Vannellidae are a family of Amoebozoa, which are found in soil, fresh- and salt water.[1][2] The most common genus is Vannella.

Vannellidae
Scientific classification
Phylum: Amoebozoa
Class: Discosea
Subclass: Flabellinia
Order: Vannellida
Smirnov et al., 2005
Family: Vannellidae
Bovee, 1970
Genera

Description

Vannellidae tend to be flattened and fan-shaped during motion, although some are long and narrow, and have a prominent clear margin at the anterior.[3] In most amoebae, the endoplasm glides forward through the center of the cell, but vannellids undergo a sort of rolling motion with the outer membrane sliding around like a tank tread. These amoebae are usually 10-40 μm in size, but some are smaller or larger.

Vannellidae are surrounded by an outer covering called the glycocalyx, which is generally 10-20 nm across, though the thickness varies among species. In some species, a layer of hair-like filaments called glycostyles protrudes from the glycocalyx.[2]

Taxonomy

Molecular phylogenies include them in the class Flabellinia as a sister group to the others, which have subpseudopodia.

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References
  1. Moselio Schaechter, ed. (2011). "Protists". Eukaryotic Microbes. Academic Press. p. 202. ISBN 9780123838773.
  2. Smirnov AV, Nassonova ES, Chao E, Cavalier-Smith T (July 2007). "Phylogeny, evolution, and taxonomy of vannellid amoebae". Protist. 158 (3): 295–324. doi:10.1016/j.protis.2007.04.004. PMID 17602867.
  3. "Family Vannellidae Bovee, 1970". Microworld. Retrieved 4 July 2016.


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