Difference between revisions of "Biserial"
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| − | | [[ | + | [[File:Fig 37.gif|thumb|<font size="2">'''Fig. 1.''' 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 totion; '''pst:''' peristome; '''spax:''' coiling axis; (Hottinger, 2006; fig. 37.6-7 [http://paleopolis.rediris.es/cg/CG2006_M02/index.html] '''CC'''/BY-NC-SA)]] | ||
| + | __FORCETOC__ | ||
| + | ==Definition== | ||
| + | *''according to Hottinger (2006):'' | ||
| + | '''BISERIAL''' - trochospiral chamber arrangement with about 180° between consecutive chambers, thus producing two rows of chambers. See [[serial disposition of chambers]]. | ||
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| + | ==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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| + | | [[Foraminifera]] | [[EForams-LINKS|FORAM-Links]] | [[CONTRIBUTORS|Contributors]] | | ||
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[[Image:2serial01a.jpg|thumb|left|150px|<font size="2">A. Simulation of the biserial shell with 12 chambers: side view</font>]] | [[Image:2serial01a.jpg|thumb|left|150px|<font size="2">A. Simulation of the biserial shell with 12 chambers: side view</font>]] | ||
[[Image:2serial01.jpg|thumb|left|150px|<font size="2">B. Simulation of the biserial shell: virtual axial section of the shell from Fig. A</font>]] | [[Image:2serial01.jpg|thumb|left|150px|<font size="2">B. Simulation of the biserial shell: virtual axial section of the shell from Fig. A</font>]] | ||
[[Image:2serial01.thin.jpg|thumb|left|150px|<font size="2">C. Simulation of the biserial shell: virtual thin-section of the shell from Figs A, B</font>]] | [[Image:2serial01.thin.jpg|thumb|left|150px|<font size="2">C. Simulation of the biserial shell: virtual thin-section of the shell from Figs A, B</font>]] | ||
