View source for Fusiform

[[File:Fig.37.13.png|thumb|<font size="2">'''Fig. 1.''' Chamber arrangement and apertural face. Schematic, not to scale. In part after Hottinger, 2000; '''13:''' planispiral-fusiform: '''A:''' axial section, '''E:''' equatorial section. Black arrow: direction of growth; white arrow: direction of movement; '''col:''' [[columella]]; (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):''
'''FUSIFORM''' -  the outer shape of a shell similar to a spindle, with its polar ends more or less tapered  In fusulinids, loftusias, alveolinids, ''Fusarchaias'' and ''Boreloides'', it is produced by planispiral-involute growth when the length of successive chambers in axial direction increases more rapidly than the half circumference of the corresponding [[equator]] of the shell. Note the shortening of the pathways through a fusiform shell in polar direction for up to one order of magnitude as compared to the equatorial path and see also [[polar torsion]].


==See also==
*[[equator]]
*[[polar torsion]]
==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 (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.
     
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