Difference between revisions of "Glossary"
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| − | Glossary of Terms used in Foraminiferal Research | + | == Glossary of Terms used in Foraminiferal Research == |
(Preliminary Version 1997) | (Preliminary Version 1997) | ||
| − | Lukas Hottinger and Verena Scheuring | + | '''Lukas Hottinger and Verena Scheuring''' |
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Geological Institute, Basel University, Switzerland | Geological Institute, Basel University, Switzerland | ||
| − | Introduction | + | |
| + | '''The final and updated GLOSSARY is already available from: | ||
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| + | Hottinger (2006). [http://paleopolis.rediris.es/cg/06/M02/index.html Illustrated glossary of terms used in foraminiferal research]. Carnets de Géologie, Memoir 2, ISSN 1634-0744 [http://paleopolis.rediris.es/cg/06/M02/index.html http://paleopolis.rediris.es/cg/06/M02/index.html]''' | ||
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| + | '''''THIS IS JUST A TEST:''''' | ||
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| + | === Introduction === | ||
The terminology used by various authors in describing the morphological features of the foraminiferal test is far from being unified and varies greatly from case to case (compare e.g. Reiss, 1963, Hottinger, 1978, Hottinger et al., 1990, 1993, Loeblich and Tappan, 1964, 1987). The reasons for the variety of terms for the same feature are in most cases not at all formal, but due to differences of opinion with regard to the significance of features, concerning homologies and analogies, to differences in levels of accuracy, as well as due to different methods of observation (Hottinger, 1978). | The terminology used by various authors in describing the morphological features of the foraminiferal test is far from being unified and varies greatly from case to case (compare e.g. Reiss, 1963, Hottinger, 1978, Hottinger et al., 1990, 1993, Loeblich and Tappan, 1964, 1987). The reasons for the variety of terms for the same feature are in most cases not at all formal, but due to differences of opinion with regard to the significance of features, concerning homologies and analogies, to differences in levels of accuracy, as well as due to different methods of observation (Hottinger, 1978). | ||
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Numbers following the definitions refer to selected Plate/Figures in Hottinger et al.1993 where the respective feature is illustrated. | Numbers following the definitions refer to selected Plate/Figures in Hottinger et al.1993 where the respective feature is illustrated. | ||
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| − | * Abaxial - directed away from or far from shell axis. | + | == Glossary == |
| − | * Aboral - opposite to apertural [oral] end. | + | |
| − | * Accessory aperture (infralaminal aperture, auct.) - opening that does not lead directly into the main chamber lumen, but extends beneath accessory structures (e.g. in bullae). 100/7,8. | + | === A === |
| − | * Acicular - needle-shaped. | + | |
| − | * Acicular spine - see spine. | + | ---- |
| − | * Acuminate - tapering, i.e. getting thinner or pointed; conical. | + | |
| − | * Acute - shape with acute or sharp angles. | + | * [[Abaxial]] - directed away from or far from shell axis. |
| − | * Adapertural depression (periapertural depression; cavity; apertural fissure, auct.) - space formed by a toothplate and separated by the latter partly or completely from the main chamber lumen. Interconnected adapertural depressions produce a canal. 115/4. 119/15. 120/7. 124/7. | + | * [[Aboral]] - opposite to apertural [oral] end. |
| − | * Adaxial - directed towards or positioned near the shell axis. | + | * [[Accessory aperture]] (infralaminal [[aperture]], auct.) - opening that does not lead directly into the main chamber lumen, but extends beneath accessory structures (e.g. in bullae). 100/7,8. |
| − | * Advolute chamber arrangement - in spirally coiled forms where chamber lumina in whorl cover laterally those of the preceding whorl to a considerable extent, but not entirely, on one or both sides. Compare: evolute, involute. 2/5,6. | + | * [[Acicular]] - needle-shaped. |
| − | * Acervuline - chambers in irregular, clustered arrangement, as in Acervulina. | + | * [[Acicular spine]] - see spine. |
| − | * Adauxiliary chamber - chamberlet arising from single radial stolon (additional in respect to apertures between proto- and deuteroconch) in the embryonic wall of orbitoidiform shells. Adventitious - produced by or with the help of foreign particles such as those forming an agglutinated test. | + | * [[Acuminate]] - tapering, i.e. getting thinner or pointed; conical. |
| − | * Agamogony - asexual reproduction within the reproduction cycle, from the first mitotic division of the zygote to meiosis. | + | * [[Acute]] - shape with acute or sharp angles. |
| − | * Agamont - specimen grown from the zygote, producing either gamonts or schizonts in an asexual process involving apogamous nuclear divisions and/or meiosis. Foraminiferal agamonts, produced by a sexual reproduction, are microspheric (B - form). | + | * [[Adapertural depression]] (periapertural depression; cavity; apertural fissure, auct.) - space formed by a toothplate and separated by the latter partly or completely from the main chamber lumen. Interconnected adapertural depressions produce a canal. 115/4. 119/15. 120/7. 124/7. |
| − | * Agglutinated - shell texture characterized by components gathered in the ambient environment and bound by organic or biomineralized cements produced by the cell. Particles may be selected according to size and shape to form a closefitting mosaic. Often, the agglutination in the external and internal parts of the wall is differentiated without sharp boundaries: external agglutination is finer-grained and better organized than internal parts. 1/1. 12/1. 29/4,10. | + | * [[Adaxial]] - directed towards or positioned near the shell axis. |
| − | * Alar prolongation - winglike extension of umbilico-lateral portions of involute chambers on lateral surfaces of previous whorls in lenticular tests. May be meandering. 182/1. 224/6. | + | * [[Advolute chamber arrangement]] - in spirally coiled forms where chamber lumina in whorl cover laterally those of the preceding whorl to a considerable extent, but not entirely, on one or both sides. Compare: evolute, involute. 2/5,6. |
| − | * Allopatric speciation - emergence of species by geographic isolation of populations for sufficient time to alter the genome of the populations involved to mutual reproductive incompatibility. | + | * [[Acervuline]] - chambers in irregular, clustered arrangement, as in Acervulina. |
| − | * Alternation of generations - see life cycle. | + | * [[Adauxiliary chamber]] - chamberlet arising from single radial stolon (additional in respect to apertures between proto- and deuteroconch) in the embryonic wall of orbitoidiform shells. Adventitious]] - produced by or with the help of foreign particles such as those forming an agglutinated test. |
| − | * Alveolar layer - layer of alveoles in lateral chamber walls forming diagnostic exoskeletal structures lacking a differentiation of beams and rafters as well as polygonal subepidermal patterns, as in opposition to subepidermal, polygonal networks or keriothecal textures. | + | * [[Agamogony]] - asexual reproduction within the reproduction cycle, from the first mitotic division of the zygote to meiosis. |
| − | * Alveole (alveolus, pl. alveoli) - recess of varying depth coated by the organic lining in lateral chamber walls, blindly ending with a rounded contour below an epiderm or some equivalent outer layer of the wall and opening into the chamber lumen. May be branching towards the outer part of the wall, each generation of branches forming layers within the wall. | + | * [[Agamont]] - specimen grown from the zygote, producing either gamonts or schizonts in an asexual process involving apogamous nuclear divisions and/or meiosis. Foraminiferal agamonts, produced by a sexual reproduction, are microspheric (B]] - form). |
| + | * [[Agglutinated]] - shell texture characterized by components gathered in the ambient environment and bound by organic or biomineralized cements produced by the cell. Particles may be selected according to size and shape to form a closefitting mosaic. Often, the agglutination in the external and internal parts of the wall is differentiated without sharp boundaries: external agglutination is finer-grained and better organized than internal parts. 1/1. 12/1. 29/4,10. | ||
| + | * [[Alar prolongation]] - winglike extension of umbilico-lateral portions of involute chambers on lateral surfaces of previous whorls in lenticular tests. May be meandering. 182/1. 224/6. | ||
| + | * [[Allopatric speciation]] - emergence of species by geographic isolation of populations for sufficient time to alter the genome of the populations involved to mutual reproductive incompatibility. | ||
| + | * [[Alternation of generations]] - see [[life cycle]]. | ||
| + | * [[Alveolar layer]] - layer of alveoles in lateral chamber walls forming diagnostic exoskeletal structures lacking a differentiation of beams and rafters as well as polygonal subepidermal patterns, as in opposition to subepidermal, polygonal networks or keriothecal textures. | ||
| + | * [[Alveole (alveolus, pl. alveoli)]] - recess of varying depth coated by the organic lining in lateral chamber walls, blindly ending with a rounded contour below an epiderm or some equivalent outer layer of the wall and opening into the chamber lumen. May be branching towards the outer part of the wall, each generation of branches forming layers within the wall. | ||
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| + | : Remarks: The term alveole is used here exclusively for exoskeletal structures, i.e. for subepidermal, tiny compartments of the chamber cavity coated by organic lining. Alveoles must be distinguished from paraporous or keriothecal cavities belonging to the wall texture. The latter are (by definititon) not filled with living chamber plasm nor coated by the organic lining. The simultaneous presence of both alveolar structures and keriothecal wall texture in the fusulinid Verbeekina and its relatives, the combination of an alveolar exoskeleton with a paraporous external wall in Dicyclina or with a bilamellar perforate wall in Fabiania supports a consequent restriction of the term's use to exoskeletal structures, never to textures. | ||
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| + | : Layers of alveoles coating the lateral chamber wall are present in various agglutinated groups of which ''Cyclammina'' is the most prominent while ''Everticyclammina'' is an early extinct representative of an exoskeletal layer of exclusively undivided, shallow alveoles. The Neogene group of Textulariella (GrÚnhagen and Luterbacher, 1966) has branching alveoles. Among the porcelaneous foraminifera, ''Austrotrillina'' may be an unique group. In this genus, species with deep and branching alveoles (''A. howchini'', Adams, 1968) are said to evolve from earlier forms with layers of shallow, undivided alveoles. | ||
| − | + | : The term alveole is also used for rows of blind recesses in postseptal position over supplementary apertures in the previous septal face as in ''Subalveolina'' or ''Bullalveolina''. We do not yet know, how to interpret (in terms of exo- or endoskeletal elements) these alveoles nor what might be their biological meaning. | |
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| − | * | + | * [[Annular arrangement]] - arrangement of concentric annular chambers. 81/6. 226/3. |
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| − | * Remarks: Unrelated to canal systems in lamellar perforate foraminifera. The term should not be used but replaced by annular space. Annular chamber - ring-shaped. May be subdivided. 82/1,4. 226/5. 227/5. | + | * [[Annular canal]] - free space between endo- and exoskeletal structures in spirocyclinids. |
| − | * Annular passage - see preseptal passage. | + | : Remarks: Unrelated to canal systems in lamellar perforate foraminifera. The term should not be used but replaced by annular space. Annular chamber]] - ring-shaped. May be subdivided. 82/1,4. 226/5. 227/5. |
| − | * Annulus - ring-shaped chamber, wich may be subdivided, or ring-shaped cycle of chamberlets. | + | * [[Annular passage]] - see preseptal passage. |
| − | * Anterior - directed to or positioned near or on frontal part of chamber, usually enclosing main aperture, distal in respect to direction of growth. | + | * [[Annulus]] - ring-shaped chamber, wich may be subdivided, or ring-shaped cycle of chamberlets. |
| − | * Antetheca - apertural face in fusulinids. | + | * [[Anterior]] - directed to or positioned near or on frontal part of chamber, usually enclosing main aperture, distal in respect to direction of growth. |
| − | * Apertural axis - see milioline coiling. | + | * [[Antetheca]] - apertural face in fusulinids. |
| − | * Apertural chamberlet - cavity in preseptal position below radiate aperture in Lenticulina and related forms. Lamellar nature of septal wall between main chamber and apertural chamberlet unclear. | + | * [[Apertural axis]] - see milioline coiling. |
| − | * Apertural face - surface of chamber-wall comprizing the main cameral aperture. | + | * [[Apertural chamberlet]] - cavity in preseptal position below radiate aperture in Lenticulina and related forms. Lamellar nature of septal wall between main chamber and apertural chamberlet unclear. |
| − | * Apertural flange - see lip. | + | * [[Apertural face]] - surface of chamber-wall comprizing the main cameral aperture. |
| − | * Apertural lip - see lip. | + | * [[Apertural flange]] - see lip. |
| − | * Apertural plate | + | * [[Apertural lip]] - see lip. |
| − | * Apertural tooth - see miliolid tooth and valvular tooth. | + | * [[Apertural plate /basal plate/]] - a plate-like structure along the base of an interiomarginal aperture and restricting the latter. 147/6,9. |
| − | * Aperture - primary opening within the test or between test elements, putting into communication intrathalamous with extrathalamous cytoplam. May be single or multiple. (See cameral aperture; foliar aperture; supplementary aperture; labial aperture). | + | * [[Apertural tooth]] - see miliolid tooth and valvular tooth. |
| − | * Apex - initial portion of trochospiral or conical test. | + | * [[Aperture]] - primary opening within the test or between test elements, putting into communication intrathalamous with extrathalamous cytoplam. May be single or multiple. (See cameral aperture; foliar aperture; supplementary aperture; labial aperture). |
| − | * Apical - referring to initial part of trochospiral or conical test. | + | * [[Apex]] - initial portion of trochospiral or conical test. |
| − | * Apogamy - reproduction process where the offspring has the same number of chromosomes than the parent cell. | + | * [[Apical]] - referring to initial part of trochospiral or conical test. |
| − | * Arborescent - branching growth-pattern in tree-like manner of permanently attached tests. 176/1. | + | * [[Apogamy]] - reproduction process where the offspring has the same number of chromosomes than the parent cell. |
| − | * Areal - aperture and/or intercameral foramen: position of aperture(s) and/or foramina within apertural face, not at its base nor at the shell margin. | + | * [[Arborescent]] - branching growth-pattern in tree-like manner of permanently attached tests. 176/1. |
| − | * Areal aperture - cameral aperture in distal wall, not at suture. May be single or multiple. 2/14,16. 79/15. 129/6. | + | * [[Areal]] - aperture and/or intercameral foramen: position of aperture(s) and/or foramina within apertural face, not at its base nor at the shell margin. |
| − | * Arenaceous - see agglutinated. | + | * [[Areal aperture]] - cameral aperture in distal wall, not at suture. May be single or multiple. 2/14,16. 79/15. 129/6. |
| − | * Areolate - chamber wall subdivided into more or less equal surfaces (areoli) as in Homotrema.175/7,8. | + | * [[Arenaceous]] - see agglutinated. |
| − | * Astral fissure - see folium, foliar aperture, foliar suture. | + | * [[Areolate]] - chamber wall subdivided into more or less equal surfaces (areoli) as in Homotrema.175/7,8. |
| − | * Astral furrow - see foliar suture. | + | * [[Astral fissure]] - see folium, foliar aperture, foliar suture. |
| − | * Astral lobe - see folium. | + | * [[Astral furrow]] - see foliar suture. |
| − | * Attics (French: mansardes) - outermost lateral or abaxial chamberlet layer in multiple-layered endoskeletal chamber structures of porcelaneous shells distinguished from less lateral or adaxial ones by its comparatively small caliber and its higher number per unit chamber wall surface. | + | * [[Astral lobe]] - see folium. |
| − | * Autogamy - sexual reproduction process where amoeboid gametes from the same gamont mate (in foraminifera within the mother shell) to form a zygote. May be combined with gamontogamy. | + | * [[Attics (French: mansardes)]] - outermost lateral or abaxial chamberlet layer in multiple-layered endoskeletal chamber structures of porcelaneous shells distinguished from less lateral or adaxial ones by its comparatively small caliber and its higher number per unit chamber wall surface. |
| − | * Auxilliary tunnel - coalescence of several cuniculi as in Polydiexodina. | + | * [[Autogamy]] - sexual reproduction process where amoeboid gametes from the same gamont mate (in foraminifera within the mother shell) to form a zygote. May be combined with gamontogamy. |
| − | * Axial filling - secondary deposits in narrow spaces around the axial columella in fusulinids and pfenderinids. Axial section - slice bisecting test in plane coinciding with axis of coiling and intersecting proloculus. 82/1. 75/5. 214/1. | + | * [[Auxilliary tunnel]] - coalescence of several cuniculi as in Polydiexodina. |
| − | * Axial septulum (in verbeekinid fusulinids) - exoskeletal structural element parallel to septum and consequently corresponding to the rafter in other exoskeletons of agglutinated foraminifera. | + | * [[Axial filling]] - secondary deposits in narrow spaces around the axial columella in fusulinids and pfenderinids. Axial section]] - slice bisecting test in plane coinciding with axis of coiling and intersecting proloculus. 82/1. 75/5. 214/1. |
| − | * Axis of coiling - imaginary line around which spiral test is coiled. | + | * [[Axial septulum]] (in verbeekinid fusulinids) - exoskeletal structural element parallel to septum and consequently corresponding to the rafter in other exoskeletons of agglutinated foraminifera. |
| + | * [[Axis of coiling]] - imaginary line around which spiral test is coiled. | ||
