View source for Bead

[[File:Fig 73.jpg|thumb|<font size="2">'''Fig. 1.''' Papillae, beads and axial piles of lamellae.
'''A:''' papilla and pores. Stereograph, schematic, not to scale; after Hottinger, 1977. '''B-C:''' ''Assilina madagascariensis'' (d'Orbigny) from Mauritius. Recent. Transverse section parallel to equatorial plane (B) and axial section (C) with minute papillae on the last whorl; transmitted light micrograph. '''D-F:''' Beading in ''Amphistegina papillosa'' Said. Gulf of Aqaba, Red Sea; Recent. '''D:''' dorsal view of shell showing beading of septular and hemiseptular sutures. Incident light micrograph. '''E:''' axial section showing hemiseptular and septular support of beads; transmitted light micrograph. '''F:''' Epoxy resin cast of shell cavity showing spiral main chamber lumina in dorsal view, interrupted by the hemiseptula supporting the interseptal beads, SEM graph.
'''a:''' [[aperture]]; '''bd:''' beads (septular and hemiseptular); '''ch:''' main (spiral) chamber lumen; '''egh:''' eggholders; '''hs:''' hemiseptulum; '''il:''' inner lamella; '''isc:''' intraseptal canal system; '''ml:''' median layer; '''ol:''' outer lamellae; '''orgl:''' organic lining of protoplast; '''p:''' pores; '''pap:''' papillae; '''pil:''' axial pile of lamellae; '''s:''' septum and septal suture; '''wsut:''' whorl suture; (Hottinger, 2006; fig. 73 [http://paleopolis.rediris.es/cg/CG2006_M02/index.html] '''CC'''/BY-NC-SA)]]
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==Definition==
*''according to Hottinger (2006):''
'''BEAD''' - a small, rounded to hemispherical protuberance on the surface of lamellar shells, forming strings along septal, septular or hemiseptular sutures. Usually imperforate or poorly perforate. To be distinguished from [[papilla]]. 





==See also==
* [[hemiseptular suture]]
* [[papilla]]
==References==
Hottinger (1977), Foraminifères operculiniformes. Mémoires du Muséum National d'Histoire Naturelle, Paris, (Série C, Sciences de la terre), t. XL, 159 p. + 66 pls.

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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