View source for Cyclical arrangement

[[File:Fig.8C-H.png|thumb|<font size="2">'''Fig. 1.''' Alternating arrangement of shell compartments in the three dimensions of space. Examples from Gulf of Aqaba, Red Sea; Recent; '''C-D:''' Alternating chamberlet arrangement in the planar (second) dimension, as in annular-concentric, discoidal shell of ''Planorbulinella elatensis'' Thomas, SEM graph of lateral view and equatorial section in transmitted light microscopy, coloured. '''E:''' Stereograph showing alternating chamberlets of a main chamberlet layer, with main stolon axes (horizontal arrows) and retrovert stolons feeding lateral chamberlet (vertical arrows). Schematic, not to scale. '''F-G:''' Alternating chamberlet arrangement in the third dimension producing a chessboard pattern, as in the spherical-concentric, globular shell of ''Sphaerogypsina globulus'' (Reuss), SEM graph of external view and centered section in transmitted light micrograph, coloured. '''H:''' Stereograph showing alternating chamberlets forming chessboard pattern. Schematic, not to scale. Colours: '''red''' and '''blue''': alternating generations of shell compartments; green: nepiontic, early stages including proloculus. '''a;''' [[aperture]]; '''ch:''' [[chamber lumen]]; '''chl:''' [[chamberlet lumen]]; '''f:''' [[foramen]]; '''lchl:''' lateral chamberlet lumen; (Hottinger, 2006; fig. 8 c-h [http://paleopolis.rediris.es/cg/CG2006_M02/index.html] '''CC'''/BY-NC-SA)]]

[[File:Fig 37.gif|thumb|<font size="2">'''Fig. 2.''' Chamber arrangement and apertural face. Schematic, not to scale. In part after Hottinger, 2000. '''1:''' planispiral-spiroliniform. '''2:''' planispiral-evolute and flaring, peneropliform. '''3:''' planispiral-evolute, approaching reniform, '''4:''' annular-concentric, with thickened and folded margins, as in ''Marginopora vertebralis''. '''5:''' planispiral-involute, as in ''Archaias''. '''6:''' biserial – textulariid. '''7:''' biserial-cuneiform. '''8:''' uniserial-conical. '''9:''' uniserial-conical with marginal apertures. '''10:''' streptospiral-involute as in ''Pseudonummuloculina''. Coiling axis rotating with each chamber. '''11:''' streptospiral with planispiral-involute adult stage, as in ''Helenalveolina''. '''12:''' planispiral involute. Coiling axis fixed throughout ontogeny. '''13:''' planispiral-fusiform: '''A:''' axial section, '''E:''' equatorial section. Black arrow: direction of growth; white arrow: direction of movement. '''14:''' miliolid (-quinquelocular, -trilocular), with fixed apertural axis and with coiling axis rotating in perpendicular position in respect to apertural axis. '''15:''' miliolid-bilocular with fixed apertural and coiling axes. '''16:''' unilocular-concentric, with discoidal trematophore, as in ''Lacazina elongata''. '''17:''' unilocular-concentric with annular trematophore, as in ''Lacazina compressa''. '''18:''' low-trochospiral, as in ''Rotorbinella''. '''19:''' high-trochospiral, as in ''Sakesaria''; '''a:''' [[aperture]]; '''af:''' [[apertural face]]; '''apax:''' apertural axis; '''col:''' [[columella]]; '''fol:''' [[folium]]; '''ma:''' [[marginal aperture]]; '''n:''' [[notch]]; '''per:''' periphery; '''potort:''' [[polar torsion]]; '''pst:''' [[peristome]]; '''spax:''' [[coiling axis]]; (Hottinger, 2006; fig. 37 [http://paleopolis.rediris.es/cg/CG2006_M02/index.html] '''CC'''/BY-NC-SA)]]
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==Definition==
*''according to Hottinger (2006):''
'''CYCLICAL ARRANGEMENT''' - arrangement of cyclical chamberlets in one plane or in concentric layers.




==References==
Hottinger (2000), Functional morphology of benthic foraminiferal shells, envelopes of cells beyond measure, In: Lee J.J. & Hallock P. (eds.), Advances in biology of Foraminifera, Micropaleontology, New York, vol. 46, suppl. 1, p. 57-86.

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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