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
Domain:
Eukaryota
(unranked):
Amoebozoa
Class:
Discosea
Order:
Vannellida
Family:
Vannellidae

Bovee 1970
Genera

Clydonella
Discamoeba
Lingulamoeba
Pessonella
Platyamoeba
Unda
Vannella

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 Flabellinea as a sister group to the others, which have subpseudopodia.

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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