Stercomata: Difference between revisions
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Fusulinacea (talk | contribs) Rewrote scientific description of stercomata and set up outline for further clarification of concept. Tag: references removed |
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'''Stercomata''' (or stercomes) are extracellular pellets of waste material produced by some groups of [[foraminifera]]ns, including [[xenophyophorea]]ns and [[komokiacea]]ns, ''Gromia'', and [[testate amoebae]]a. The pellets are ovoid (egg-shaped), brownish in color, and generally measure from 10-20 µm in length.{{cn}} Stercomata are composed of small mineral grains and undigested waste products held together by strands of [[glycosaminoglycans]].{{cn}} |
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'''Stercomata''' are pellets of waste material accumulated in some species of [[foraminifera]] and [[testate amoebae]]. The pellets consist largely of [[clay]] minerals and are believed to be derived from ingested sediment{{citation needed|date=August 2017}}, indicating that the stercomata-bearing foraminifera are filter-feeders{{citation needed|date=August 2017}}, although it is possible that they may capture suspended particles.<ref>{{citation|url=https://books.google.com/books?id=cobtqd18cWgC&pg=PA109|title=Biogeochemical Controls on Palaeoceanographic Environmental Proxies|page=109|editor=William E. N. Austin, Rachael James}}</ref><ref>{{Cite book|url=https://www.worldcat.org/oclc/851378735|title=Recent Foraminifera|last=Esteban|first=Boltovskoy|date=1976|publisher=Springer Netherlands|others=Wright, Ramil.|isbn=9789401728607|location=Dordrecht|oclc=851378735|page=19}}</ref> In certain species the stercomata are enveloped in sheet-like formations of [[protoplasm]].<ref>{{citation|url=https://books.google.com/books?id=3JHpCAAAQBAJ&pg=PA75|title=Deep-Sea Food Chains and the Global Carbon Cycle|editor=G.T. Rowe, Vita Pariente|page=75}}</ref> |
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==Taxonomic distribution== |
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===Foraminifera=== |
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====Xenophyophores==== |
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In xenophyophores, the stercomata are contained within an organic tubes called stercomare. |
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====Komokiacea==== |
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====Saccamminid foraminiferans==== |
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===''Gromia''=== |
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===Testate Amobae=== |
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==Role of stercomata== |
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==See also== |
==See also== |
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Revision as of 04:04, 3 April 2022
Stercomata (or stercomes) are extracellular pellets of waste material produced by some groups of foraminiferans, including xenophyophoreans and komokiaceans, Gromia, and testate amoebaea. The pellets are ovoid (egg-shaped), brownish in color, and generally measure from 10-20 µm in length.[citation needed] Stercomata are composed of small mineral grains and undigested waste products held together by strands of glycosaminoglycans.[citation needed]
Taxonomic distribution
Foraminifera
Xenophyophores
In xenophyophores, the stercomata are contained within an organic tubes called stercomare.
Komokiacea
Saccamminid foraminiferans
Gromia
Testate Amobae
Role of stercomata
See also
References
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