Difference between revisions of "Auxiliary chamber"

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(Created page with "File:Fig 04.gif|thumb|<font size="2">'''Fig. 1.''' Embryonic and periembryonic chambers in ''Orbitoides spp.'' according to Van Hinte's 1966 concept. '''I:''' protoconch; ''...")
 
 
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'''I:''' protoconch; '''II:''' deuteroconch; '''PAC:''' principal auxiliary chamber; '''PEC:''' principal epi-auxiliary chamber; '''AEC:''' accessory epi-auxiliary chamber. In our view, we prefer to call PAC an auxiliary and AEC an adauxiliary chamber; (Hottinger, 2006; fig. 4 [http://paleopolis.rediris.es/cg/CG2006_M02/index.html] '''CC'''/BY-NC-SA)]]
 
'''I:''' protoconch; '''II:''' deuteroconch; '''PAC:''' principal auxiliary chamber; '''PEC:''' principal epi-auxiliary chamber; '''AEC:''' accessory epi-auxiliary chamber. In our view, we prefer to call PAC an auxiliary and AEC an adauxiliary chamber; (Hottinger, 2006; fig. 4 [http://paleopolis.rediris.es/cg/CG2006_M02/index.html] '''CC'''/BY-NC-SA)]]
  
[[File:Fig 36.gif|thumb|<font size="2">'''Fig. 2.'''  Development of chamberlet cycles from an auxiliary chamber in an early orbitoid, the Campanian ''Lepidorbitoides minima'' H. Douvillé from Mexico, after Aguilar et alii, 2002.
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[[File:Fig. 36a.png|thumb|<font size="2">'''Fig. 2.'''  Development of chamberlet cycles from an auxiliary chamber in an early orbitoid, the Campanian ''Lepidorbitoides minima'' H. Douvillé from Mexico, after Aguilar et alii, 2002.
'''A:''' stereograph of a megalospheric embryo consisting of a biconch (protoconch and deuteroconch) supplemented by a third chamber (auxiliary chamber) with a median and two lateral stolons. Successive growth stages coloured alternately in red and blue. Lamellation omitted. Schematic, not to scale. '''B:''' development of chamberlet cycles. Schema, not to scale. Inner lamella omitted, outer lamella alternating in white or plain black in successive growth stages. Axes of successive stolons form overcrossing spirals (arrows). Median stolons indicated by dotted arrows, lateral stolons by black arrows. '''C:''' Camera lucida drawing of a slightly oblique section of the equatorial main chamberlet layer of adult growth stage showing retrovert apertures and annular passages. '''D:''' stereograph of adult chamberlets of two successive cycles with their crosswise-oblique stolon axes, the annular passage and their retrovert stolons. Schematic, not to scale.
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'''A:''' stereograph of a megalospheric embryo consisting of a biconch (protoconch and deuteroconch) supplemented by a third chamber (auxiliary chamber) with a median and two lateral stolons. Successive growth stages coloured alternately in red and blue. Lamellation omitted. Schematic, not to scale.  
'''A:''' auxiliary chamber; '''D:''' [[deuteroconch]]; '''P:''' [[protoconch]]; '''X:''' closing chamberlet filling up the first chamberlet annulus; '''ap:''' [[annular passage]]; '''chl:''' [[chamberlet lumen]]; '''lst:''' lateral stolon; '''mst:''' median stolon; '''p:''' pores; '''rst:''' retrovert stolons; '''stax:''' crosswise-oblique stolon axes; (Hottinger, 2006; fig. 36 [http://paleopolis.rediris.es/cg/CG2006_M02/index.html] '''CC'''/BY-NC-SA)]]
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'''A:''' auxiliary chamber; '''D:''' [[deuteroconch]]; '''P:''' [[protoconch]]; ; '''lst:''' lateral stolon; '''mst:''' median stolon; (Hottinger, 2006; fig. 36a [http://paleopolis.rediris.es/cg/CG2006_M02/index.html] '''CC'''/BY-NC-SA)]]
 
__FORCETOC__
 
__FORCETOC__
 
==Definition==
 
==Definition==
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==References==
 
==References==
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Aguilar, Bernaus, Caus & Hottinger (2002), Lepidorbitoides minima DOUVILLÉ from Mexico, a foraminiferal index fossil for the Campanian, Journal of foraminiferal Research, Lawrence, vol. 32, N° 2, p. 126–134.
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Van Hinte (1966), Orbitoides from the Campanian type section. Part I., Koninklijke Nederlandse Akademie van Wetenschappen, Proceedings, Amsterdam, (Series B), vol. 69, N° 1, p. 79-110.
 +
 
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 (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                                                               
 
                                     | [[Foraminifera]]  |  [[EForams-LINKS|FORAM-Links]] | [[CONTRIBUTORS|Contributors]]
 
                                     | [[Foraminifera]]  |  [[EForams-LINKS|FORAM-Links]] | [[CONTRIBUTORS|Contributors]]

Latest revision as of 15:22, 29 March 2019

Fig. 1. Embryonic and periembryonic chambers in Orbitoides spp. according to Van Hinte's 1966 concept. I: protoconch; II: deuteroconch; PAC: principal auxiliary chamber; PEC: principal epi-auxiliary chamber; AEC: accessory epi-auxiliary chamber. In our view, we prefer to call PAC an auxiliary and AEC an adauxiliary chamber; (Hottinger, 2006; fig. 4 [1] CC/BY-NC-SA)
Fig. 2. Development of chamberlet cycles from an auxiliary chamber in an early orbitoid, the Campanian Lepidorbitoides minima H. Douvillé from Mexico, after Aguilar et alii, 2002. A: stereograph of a megalospheric embryo consisting of a biconch (protoconch and deuteroconch) supplemented by a third chamber (auxiliary chamber) with a median and two lateral stolons. Successive growth stages coloured alternately in red and blue. Lamellation omitted. Schematic, not to scale. A: auxiliary chamber; D: deuteroconch; P: protoconch;  ; lst: lateral stolon; mst: median stolon; (Hottinger, 2006; fig. 36a [2] CC/BY-NC-SA)

Definition

  • according to Hottinger (2006):

AUXILIARY CHAMBER - (= auxiliary chamberlet); a chamber or a chamberlet fed by a stolon positioned in the suture between protoconch and deuteroconch in orbitoidiform foraminifers. May be double in embryos with a bilateral symmetry or multiple, when the protoconch and the deuteroconch have additional equatorial stolons. Together with the adauxiliary chamberlets, they form a corona.





See also:

References

Aguilar, Bernaus, Caus & Hottinger (2002), Lepidorbitoides minima DOUVILLÉ from Mexico, a foraminiferal index fossil for the Campanian, Journal of foraminiferal Research, Lawrence, vol. 32, N° 2, p. 126–134.

Van Hinte (1966), Orbitoides from the Campanian type section. Part I., Koninklijke Nederlandse Akademie van Wetenschappen, Proceedings, Amsterdam, (Series B), vol. 69, N° 1, p. 79-110.

Hottinger (2006), Illustrated glossary of terms used in foraminiferal research. Carnets de Géologie, Memoir 2, ISSN 1634-0744

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