Difference between revisions of "Face"
(Created page with "File:Fig 48.jpg|thumb|<font size="2">'''Fig. 1.''' Faces (coloured red) in biserial and spiral forms. SEM graphs (if not specified otherwise) of specimens from the Gulf of A...") |
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''Remarks:'' Sofar, the term "face" has been used in combination with a modifyer like [[apertural face]] or septal face, that concern only a single chamber. In addition, we introduce here the generalized term "face" to designate that portion of the shell surface which by its morphological differentiation indicates a particular function. This surface may be delimited by breaks in the topography of the shell surface, such as an angular periphery in trochospiral shells that delimit a more or less flattened base to the conical shape of the shell, or by a particular wall texture, the lack of perforation for instance, and/or by a discrete ornamentation such as radial (''Discorbinoides'') or parallel-linear (''Scarificatina'') ornaments over spiral-umbilical surfaces. Faces are directed towards the substrate in motile benthics, away from the substrate in permanently sessile, arborescent forms or are opposite each other in paired shells ready for [[plastogamy]]. The grouping of apertures and/or orifices on the face may indicate its autecological functions. | ''Remarks:'' Sofar, the term "face" has been used in combination with a modifyer like [[apertural face]] or septal face, that concern only a single chamber. In addition, we introduce here the generalized term "face" to designate that portion of the shell surface which by its morphological differentiation indicates a particular function. This surface may be delimited by breaks in the topography of the shell surface, such as an angular periphery in trochospiral shells that delimit a more or less flattened base to the conical shape of the shell, or by a particular wall texture, the lack of perforation for instance, and/or by a discrete ornamentation such as radial (''Discorbinoides'') or parallel-linear (''Scarificatina'') ornaments over spiral-umbilical surfaces. Faces are directed towards the substrate in motile benthics, away from the substrate in permanently sessile, arborescent forms or are opposite each other in paired shells ready for [[plastogamy]]. The grouping of apertures and/or orifices on the face may indicate its autecological functions. | ||
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==References== | ==References== | ||
Hottinger (2006), [http://paleopolis.rediris.es/cg/CG2006_M02/index.html Illustrated glossary of terms used in foraminiferal research]. [http://paleopolis.rediris.es/cg/uk-index.html Carnets de Géologie], [http://paleopolis.rediris.es/cg/CG2006_M02/index.html Memoir 2], ISSN 1634-0744 | Hottinger (2006), [http://paleopolis.rediris.es/cg/CG2006_M02/index.html Illustrated glossary of terms used in foraminiferal research]. [http://paleopolis.rediris.es/cg/uk-index.html Carnets de Géologie], [http://paleopolis.rediris.es/cg/CG2006_M02/index.html Memoir 2], ISSN 1634-0744 | ||
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