词条 | Euglyphida |
释义 |
| image = Euglypha sp.jpg | image_alt = "Euglypha" sp. | image_caption = Euglypha sp. | status = | status_system = | status_ref = | taxon = Euglyphida | authority = Copeland, 1956 | synonyms = | synonyms_ref = | subdivision_ranks = Families[1] | subdivision =
}} The euglyphids are a prominent group of filose amoebae that produce shells or tests from siliceous scales, plates, and sometimes spines. These elements are created within the cell and then assembled on its surface in a more or less regular arrangement, giving the test a textured appearance. There is a single opening for the long slender pseudopods, which capture food and pull the cell across the substrate. Euglyphids are common in soils, marshes, and other organic-rich environments, feeding on tiny organisms such as bacteria. The test is generally 30-100 μm in length, although the cell only occupies part of this space. During reproduction a second shell is formed opposite the opening, so both daughter cells remain protected. Different genera and species are distinguished primarily by the form of the test. Euglypha and Trinema are the most common. The euglyphids are traditionally grouped with other amoebae. However, genetic studies instead place them with various amoeboid and flagellate groups, forming an assemblage called the Cercozoa. Their closest relatives are the thaumatomonads, flagellates that form similar siliceous tests. PhylogenyPhylogeny based on Chatelain et al. 2013[2] {{clade| style=font-size:100%;line-height:80%|label1=Euglyphida |1={{Clade |1=Paulinellidae de Saedeleer 1934 emend. Adl et al. 2012 |2={{Clade |1=Cyphoderiidae de Saedeleer 1934 |2={{Clade |1=Tracheleuglypha Deflandre 1928 |label2=Euglyphina |2={{Clade |1=Assulinidae Lara et al. 2007 |2={{Clade |1=Euglyphidae Wallich 1864 emend Lara et al. 2007 |2={{Clade |1=Sphenoderiidae Chatelain et al. 2013 |2=Trinematidae Hoogenraad & De Groot 1940 emend Adl et al. 2012 }} }} }} }} }} }} }} TaxonomyOrder Euglyphida Copeland 1956 emend. Cavalier-Smith 1997[3]
References1. ^{{cite web|url=http://www.marinespecies.org/aphia.php?p=taxdetails&id=22624 |accessdate=7 September 2018 |title=Euglyphida |publisher=WoRMS - World Register of Marine Species}} {{Wikispecies}}{{Rhizaria}}{{Taxonbar|from=Q148779}}2. ^{{citation | date=2013 | last1=Chatelain | first1=Auriel P. | last2=Meisterfeld | first2=Ralf |last3=Roussel-Delif | first3=Ludovic |last4=Lara | first4=Enrique | title=Sphenoderiidae (fam. nov.), a New Clade of Euglyphid Testate Amoebae Characterized by Small, Round Scales Surrounding the Aperture | url=http://www.sciencedirect.com/science/article/pii/S1434461013000680 | volume=164 |issue=6 |pages=782–792 |journal=Protist | doi=10.1016/j.protis.2013.08.001 | pmid=24152919}} 3. ^{{citation | date=2016 | last1=Kosakyan | first1=Anush | last2=Gomaa | first2=Fatma |last3=Lara | first3=Enrique |last4=Lahr | first4=Daniel J.G. | title=Current and future perspectives on the systematics, taxonomy and nomenclature of testate amoebae | volume=164 |issue=6 |pages=782–792 |journal=European Journal Protistology | doi=10.1016/j.ejop.2016.02.001 | pmid=27004416}} 3 : Imbricatea|Cercozoa orders|Amoeboids |
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