Difference between revisions of "Beam"
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==Definition== | ==Definition== | ||
*''according to Hottinger (2006):'' | *''according to Hottinger (2006):'' | ||
| − | '''BEAM''' - an [[exoskeletal]] main partition of the chamber lumen, perpendicular to the chamber septum and to the lateral chamber wall. In discoidal shells often separated from an [[endoskeleton]] by an empty space in the chamber ([[annular passage]]). May fuse with endoskeletal elements such as [[septula]], particularly in verbeekinids, orbitolinids and cuneolinids. May occur as unique exoskeletal element (Orbitopsella, Fig. 1) or in combination with minor, shorter exoskeletal elements producing a subepidermal polygonal network (Spirocyclinidae, Fig. 2). | + | '''BEAM''' - an [[exoskeletal]] main partition of the chamber lumen, perpendicular to the chamber septum and to the lateral chamber wall. In discoidal shells often separated from an [[endoskeleton]] by an empty space in the chamber ([[annular passage]]). May fuse with endoskeletal elements such as [[septula]], particularly in verbeekinids, orbitolinids and cuneolinids. May occur as unique exoskeletal element (Orbitopsella, Fig. 1.) or in combination with minor, shorter exoskeletal elements producing a subepidermal polygonal network (Spirocyclinidae, Fig. 2.). |
