Difference between revisions of "Foraminiferal Organic Lining"

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==Definition==
 
==Definition==
 
*''according to Hottinger (2006):''
 
*''according to Hottinger (2006):''
'''APERTURE''' -  the primary opening of the foraminiferal shell cavity towards the ambient environment. May be covered by subsequent chambers and thus transformed into a [[foramen]]. May be masked (see [[mask]]). May be single or multiple.
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'''APERTURE''' -  FORAMINIFERAL ORGANIC LINING**(FOL)* - a residual organic remnant of foraminifera left after dissolution of its mineral test, usually
 
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following palynological extraction procedures (Tyszka et al., 2021 - submitted).
''Remarks'': We insist here on restricting the use of the term "aperture" in chambered shells to the ultimate opening of the last chamber cavity into the ambient environment. When a new chamber is added to the previous one as a main process of growth, the aperture is transformed into a means of communication between successive chamber lumina and thus its function changes. The transformed aperture is called a (intercameral) foramen. Its morphology may change through selective resorption of its margins. Often, the last chamber of the shell is not preserved because of its thin walls (see [[lamellation]]) and the aperture is lost.
 
  
 
==See also==
 
==See also==

Revision as of 17:54, 11 June 2021

Fig. 1. The aperture and the apertural face (coloured pink) in a biserial form - Textularia aff. goesi Cushman. SEM graphs of specimens from the Gulf of Aqaba, Red Sea. Recent. A-B: apertural (A) and peripheral (B) views of an intact specimen. Note the smooth surfaces characteristic of the faces of many agglutinated forms. a: aperture; af: apertural face; sut: (chamber) suture (Hottinger, 2006; fig. 48 [1] CC/BY-NC-SA)

UNDER CONSTRUCTION

Definition

  • according to Hottinger (2006):

APERTURE - FORAMINIFERAL ORGANIC LINING**(FOL)* - a residual organic remnant of foraminifera left after dissolution of its mineral test, usually following palynological extraction procedures (Tyszka et al., 2021 - submitted).

See also

References

Godos et al. (2021): File:FOLs-Fig1.pdf Global Database of Foraminiferal Organic Linings: ForamL Version 1.0.

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