Cryptofilida

Cryptofilida
Scientific classification Edit this classification
Domain: Eukaryota
Clade: Diaphoretickes
Clade: SAR
Phylum: Cercozoa
Class: Granofilosea
Order: Cryptofilida
Cavalier-Smith & Bass, 2009
Families

Cryptofilida (from Latin crypto 'hidden', and fila 'threads') is an order of small heterotrophic protists in the phylum Cercozoa. They are filose amoebae that lack cilia and gliding, and are instead characterized by movement through branching or unbranched granular filopodia that are appressed to the substrate during their feeding.[1][2]

In studies on the impact of conventional soil management, Cryptofilida were identified as ecological indicators.[3][4]

Phylogeny and taxonomy

Phylogeny

Cryptofilida is a clade inside Granofilosea, and is phylogenetically related to Limnofilida, a group with similar amoeboid protists. However, the exact relationships between the granofilosean clades is still unresolved. Two outcomes are shown here from the 2009 analysis that identified the group for the first time:[1]

A more recent analysis shows this result:[5]

Taxonomy

The order contains two families with one species each.[1]

References

  1. 1 2 3 Bass D, Chao EE, Nikolaev S, Yabuki A, Ishida KI, Berney C, Pakzad U, Wylezich C, Cavalier-Smith T (2009). "Phylogeny of Novel Naked Filose and Reticulose Cercozoa: Granofilosea cl. n. and Proteomyxidea Revised". Protist. 160 (1): 75–109. doi:10.1016/j.protis.2008.07.002. ISSN 1434-4610. PMID 18952499.
  2. ↑ Cavalier-Smith, Thomas; Chao, Ema E.; Lewis, Rhodri (April 2018). "Multigene phylogeny and cell evolution of chromist infrakingdom Rhizaria: contrasting cell organisation of sister phyla Cercozoa and Retaria". Protoplasma. 255 (5): 1517–1574. doi:10.1007/s00709-018-1241-1. PMC 6133090. PMID 29666938.
  3. ↑ Harkes P, Suleiman AK, van den Elsen SJ, Haan JJ, Holterman M, Kuramae EE, Helder J (15 February 2019). "Mapping of long-term impact of conventional and organic soil management on resident and active fractions of rhizosphere communities of barley". bioRxiv (546192). doi:10.1101/546192. S2CID 92116125.
  4. ↑ Harkes P, Suleiman AK, van den Elsen SJ, de Haan JJ, Holterman M, Kuramae EE, Helder J (18 September 2019). "Conventional and organic soil management as divergent drivers of resident and active fractions of major soil food web constituents". Scientific Reports. 9 (1): 13521. Bibcode:2019NatSR...913521H. doi:10.1038/s41598-019-49854-y. PMC 6751164. PMID 31534146.
  5. ↑ Howe AT, Bass D, Scoble JM, Lewis R, Vickerman K, Arndt H, Cavalier-Smith T (2011). "Novel Cultured Protists Identify Deep-branching Environmental DNA Clades of Cercozoa: New Genera Tremula, Micrometopion, Minimassisteria, Nudifila, Peregrinia". Protist. 162 (2): 332–372. doi:10.1016/j.protis.2010.10.002. ISSN 1434-4610.
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