Morphometric redefinition of the component chronospecies of the Globorotalia conoidea - G. inflata lineage in DSDP Hole 29-284
Phylo-zonations (or lineage-zonations) are based upon morphological changes within individual evolutionary lineages. These zonations, although potentially of use for stratigraphic subdivision and correlation, often suffer from a lack of quantitative exactness in the definitions of chronospecies. Thu...
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1982
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.684616 2023-05-15T13:30:54+02:00 Morphometric redefinition of the component chronospecies of the Globorotalia conoidea - G. inflata lineage in DSDP Hole 29-284 Malmgren, Bjorn Kennett, James P LATITUDE: -40.508000 * LONGITUDE: 167.680200 * DATE/TIME START: 1973-04-15T00:00:00 * DATE/TIME END: 1973-04-15T00:00:00 * MINIMUM DEPTH, sediment/rock: 34.0 m * MAXIMUM DEPTH, sediment/rock: 159.0 m 1982-02-28 text/tab-separated-values, 50 data points https://doi.pangaea.de/10.1594/PANGAEA.684616 https://doi.org/10.1594/PANGAEA.684616 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.684616 https://doi.org/10.1594/PANGAEA.684616 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Malmgren, Bjorn; Kennett, James P (1982): The potential of morphometrically based phylo-zonation: application of a Late Cenozoic planktonic foraminiferal lineage. Marine Micropaleontology, 7(4), 285-296, https://doi.org/10.1016/0377-8398(82)90006-8 - 29-284 AGE maximum/old minimum/young Angle Antarctic Ocean/Tasman Sea/PLATEAU Chamber number Deep Sea Drilling Project Depth bottom/max sediment/rock top/min DRILL Drilling/drill rig DSDP Glomar Challenger Leg29 Roundness Species Dataset 1982 ftpangaea https://doi.org/10.1594/PANGAEA.684616 https://doi.org/10.1016/0377-8398(82)90006-8 2023-01-20T08:44:56Z Phylo-zonations (or lineage-zonations) are based upon morphological changes within individual evolutionary lineages. These zonations, although potentially of use for stratigraphic subdivision and correlation, often suffer from a lack of quantitative exactness in the definitions of chronospecies. Thus exact reproducibility is hindered for stratigraphic determinations. The potential of morphometrically defined phylo-zonations is demonstrated on a temperate South Pacific Late Cenozoic lineage of planktonic foraminifera (Globorotalia conoidea through intermediate forms to Globorotalia inflata in DSDP Site 284) exhibiting phyletic gradualism. Our sampling interval is about 0.1 m.y. during the last 8 m.y. Changes in the number of chambers in the final whorl, test conicalness, percentage of keeled forms, and test roundness or inflatedness, are used to quantitatively define the following five chronospecies: G. conoidea (Late Miocene; 6.1->8.3 m.y.), G. conomiozea (latest Miocene 5.3-6.1 m.y.), G. puncticulata sphericomiozea (earliest Pliocene; 4.5-5.3 m.y.), G. puncticulata puncticulata (Early-Middle Pliocene; 2.9-4.5 m.y.), and G. inflata (Late Pliocene-Quaternary; 0-2.9 m.y.). This phylo-zonation is directly applicable to temperate cool subtropical Southern Hemisphere areas where the evolution took place (Kennett, 1967, 1973; Scott, 1979). It is still not known if the lineage occurs elsewhere; thus the applicability of the phylo-zonation over broader areas is still uncertain. Trends in general size and aperture shape seem to be climatically controlled, and thus may be only of local stratigraphic utility. The practical applications of morphometric phylo-zonation for stratigraphy is to a large extent dependent upon the amount of time and effort required to statistically define the trends. Experiments with large numbers of subsamples from this lineage demonstrate that accurate stratigraphic determinations are possible from measurements on only 15 specimens per sample, except for those very close to chronospecies ... Dataset Antarc* Antarctic Antarctic Ocean Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Pacific Antarctic Ocean Kennett ENVELOPE(-65.167,-65.167,-67.117,-67.117) ENVELOPE(167.680200,167.680200,-40.508000,-40.508000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
- 29-284 AGE maximum/old minimum/young Angle Antarctic Ocean/Tasman Sea/PLATEAU Chamber number Deep Sea Drilling Project Depth bottom/max sediment/rock top/min DRILL Drilling/drill rig DSDP Glomar Challenger Leg29 Roundness Species |
spellingShingle |
- 29-284 AGE maximum/old minimum/young Angle Antarctic Ocean/Tasman Sea/PLATEAU Chamber number Deep Sea Drilling Project Depth bottom/max sediment/rock top/min DRILL Drilling/drill rig DSDP Glomar Challenger Leg29 Roundness Species Malmgren, Bjorn Kennett, James P Morphometric redefinition of the component chronospecies of the Globorotalia conoidea - G. inflata lineage in DSDP Hole 29-284 |
topic_facet |
- 29-284 AGE maximum/old minimum/young Angle Antarctic Ocean/Tasman Sea/PLATEAU Chamber number Deep Sea Drilling Project Depth bottom/max sediment/rock top/min DRILL Drilling/drill rig DSDP Glomar Challenger Leg29 Roundness Species |
description |
Phylo-zonations (or lineage-zonations) are based upon morphological changes within individual evolutionary lineages. These zonations, although potentially of use for stratigraphic subdivision and correlation, often suffer from a lack of quantitative exactness in the definitions of chronospecies. Thus exact reproducibility is hindered for stratigraphic determinations. The potential of morphometrically defined phylo-zonations is demonstrated on a temperate South Pacific Late Cenozoic lineage of planktonic foraminifera (Globorotalia conoidea through intermediate forms to Globorotalia inflata in DSDP Site 284) exhibiting phyletic gradualism. Our sampling interval is about 0.1 m.y. during the last 8 m.y. Changes in the number of chambers in the final whorl, test conicalness, percentage of keeled forms, and test roundness or inflatedness, are used to quantitatively define the following five chronospecies: G. conoidea (Late Miocene; 6.1->8.3 m.y.), G. conomiozea (latest Miocene 5.3-6.1 m.y.), G. puncticulata sphericomiozea (earliest Pliocene; 4.5-5.3 m.y.), G. puncticulata puncticulata (Early-Middle Pliocene; 2.9-4.5 m.y.), and G. inflata (Late Pliocene-Quaternary; 0-2.9 m.y.). This phylo-zonation is directly applicable to temperate cool subtropical Southern Hemisphere areas where the evolution took place (Kennett, 1967, 1973; Scott, 1979). It is still not known if the lineage occurs elsewhere; thus the applicability of the phylo-zonation over broader areas is still uncertain. Trends in general size and aperture shape seem to be climatically controlled, and thus may be only of local stratigraphic utility. The practical applications of morphometric phylo-zonation for stratigraphy is to a large extent dependent upon the amount of time and effort required to statistically define the trends. Experiments with large numbers of subsamples from this lineage demonstrate that accurate stratigraphic determinations are possible from measurements on only 15 specimens per sample, except for those very close to chronospecies ... |
format |
Dataset |
author |
Malmgren, Bjorn Kennett, James P |
author_facet |
Malmgren, Bjorn Kennett, James P |
author_sort |
Malmgren, Bjorn |
title |
Morphometric redefinition of the component chronospecies of the Globorotalia conoidea - G. inflata lineage in DSDP Hole 29-284 |
title_short |
Morphometric redefinition of the component chronospecies of the Globorotalia conoidea - G. inflata lineage in DSDP Hole 29-284 |
title_full |
Morphometric redefinition of the component chronospecies of the Globorotalia conoidea - G. inflata lineage in DSDP Hole 29-284 |
title_fullStr |
Morphometric redefinition of the component chronospecies of the Globorotalia conoidea - G. inflata lineage in DSDP Hole 29-284 |
title_full_unstemmed |
Morphometric redefinition of the component chronospecies of the Globorotalia conoidea - G. inflata lineage in DSDP Hole 29-284 |
title_sort |
morphometric redefinition of the component chronospecies of the globorotalia conoidea - g. inflata lineage in dsdp hole 29-284 |
publisher |
PANGAEA |
publishDate |
1982 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.684616 https://doi.org/10.1594/PANGAEA.684616 |
op_coverage |
LATITUDE: -40.508000 * LONGITUDE: 167.680200 * DATE/TIME START: 1973-04-15T00:00:00 * DATE/TIME END: 1973-04-15T00:00:00 * MINIMUM DEPTH, sediment/rock: 34.0 m * MAXIMUM DEPTH, sediment/rock: 159.0 m |
long_lat |
ENVELOPE(-65.167,-65.167,-67.117,-67.117) ENVELOPE(167.680200,167.680200,-40.508000,-40.508000) |
geographic |
Antarctic Pacific Antarctic Ocean Kennett |
geographic_facet |
Antarctic Pacific Antarctic Ocean Kennett |
genre |
Antarc* Antarctic Antarctic Ocean Planktonic foraminifera |
genre_facet |
Antarc* Antarctic Antarctic Ocean Planktonic foraminifera |
op_source |
Supplement to: Malmgren, Bjorn; Kennett, James P (1982): The potential of morphometrically based phylo-zonation: application of a Late Cenozoic planktonic foraminiferal lineage. Marine Micropaleontology, 7(4), 285-296, https://doi.org/10.1016/0377-8398(82)90006-8 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.684616 https://doi.org/10.1594/PANGAEA.684616 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.684616 https://doi.org/10.1016/0377-8398(82)90006-8 |
_version_ |
1766013726394155008 |