View source for Milioline coiling

[[Image:Fig 68.gif|thumb|right|300px| <font size="2">'''Fig. 1.''' Milioline coiling. Schematic, not to scale. Note the coiling mode: only two chambers per [[whorl]]. Chamber lumina green, coiling axes black. Foramina aligned in the apertural axis (red).
'''A:''' quinqueloculine mode of coiling: for each new chamber the coiling axis rotates 72° around the apertural axis. '''B:''' triloculine mode of coiling: for each new chamber the coiling axis rotates 120°. '''C:''' biloculine mode of coiling: the coiling axis does not rotate.
'''a:''' [[aperture]]; '''cax:''' coiling axis; '''chs:''' chamber suture; '''mt:''' miliolid tooth.
(Hottinger, 2006; fig. 68 [http://paleopolis.rediris.es/cg/CG2006_M02/index.html] '''CC'''/BY-NC-SA)]]

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==Definition==

*''according to Hottinger (2006):''

'''MILIOLINE COILING''' is in porcelaneous foraminifera: [[bilocular]] coils where all terminal apertures are positioned on one common axis ([[apertural axis]]). The [[axis of coiling]] is normal to the apertural axis and is rotated so that several descrete angles exist between the median planes of consecutive [[chamber]]s: these are 72° (quinqueloculine), 120° (triloculine) or 180° (spiroloculine or biloculine). If the chambers are positioned so that in a section normal to the apertural axis they form an S-shaped curve, their arrangement is called sigmoiline. See also: [[streptospiral]].

==See also==
* [[apertural axis]]
* [[axis of coiling]]
* [[bilocular]]
* [[porcelaneous test wall]]
* [[streptospiral arrangement]]

==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.

                  

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