A review and evaluation of homology hypotheses in echinoderm paleobiology:
The extraxial-axial theory (EAT) and universal elemental homology (UEH) are often portrayed as mutually exclusive hypotheses of homology within pentaradiate Echinodermata. EAT describes homology upon the echinoderm bauplan, interpreted through early post-metamorphic growth and growth zones, dividing...
Gespeichert in:
| 1. Verfasser: | |
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| Format: | Buch |
| Sprache: | English |
| Veröffentlicht: |
Cambridge
Cambridge University Press
[2023]
|
| Schriftenreihe: | Cambridge elements
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| Schlagworte: | |
| Zusammenfassung: | The extraxial-axial theory (EAT) and universal elemental homology (UEH) are often portrayed as mutually exclusive hypotheses of homology within pentaradiate Echinodermata. EAT describes homology upon the echinoderm bauplan, interpreted through early post-metamorphic growth and growth zones, dividing it into axial regions generally associated with elements of the ambulacral system and extraxial regions that are not. UEH describes the detailed construction of the axial skeleton, dividing it into homologous plates and plate series based on symmetry, early growth, and function. These hypotheses are not in conflict; the latter is rooted in refinement of the former. Some interpretive differences arise because many of the morphologies described from eleutherozoan development are difficult to reconcile with Paleozoic forms. Conversely, many elements described for Paleozoic taxa by UEH, such as the peristomial border plates, are absent in eleutherozoans. This Element recommends these two hypotheses be used together to generate a better understanding of homology across Echinodermata |
| Beschreibung: | 44 Seiten Illustrationen, Diagramme |
| ISBN: | 9781009397179 |
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| 520 | |a The extraxial-axial theory (EAT) and universal elemental homology (UEH) are often portrayed as mutually exclusive hypotheses of homology within pentaradiate Echinodermata. EAT describes homology upon the echinoderm bauplan, interpreted through early post-metamorphic growth and growth zones, dividing it into axial regions generally associated with elements of the ambulacral system and extraxial regions that are not. UEH describes the detailed construction of the axial skeleton, dividing it into homologous plates and plate series based on symmetry, early growth, and function. These hypotheses are not in conflict; the latter is rooted in refinement of the former. Some interpretive differences arise because many of the morphologies described from eleutherozoan development are difficult to reconcile with Paleozoic forms. Conversely, many elements described for Paleozoic taxa by UEH, such as the peristomial border plates, are absent in eleutherozoans. This Element recommends these two hypotheses be used together to generate a better understanding of homology across Echinodermata | ||
| 650 | 4 | |a Echinodermata, Fossil | |
| 650 | 4 | |a Echinodermata / Evolution | |
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Datensatz im Suchindex
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| author | Sumrall, Colin D. 1967- |
| author_GND | (DE-588)1288740549 |
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| author_sort | Sumrall, Colin D. 1967- |
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| dewey-full | 563/.9 |
| dewey-hundreds | 500 - Natural sciences and mathematics |
| dewey-ones | 563 - Fossil marine & seashore invertebrates |
| dewey-raw | 563/.9 |
| dewey-search | 563/.9 |
| dewey-sort | 3563 19 |
| dewey-tens | 560 - Paleontology |
| discipline | Geologie / Paläontologie |
| discipline_str_mv | Geologie / Paläontologie |
| format | Book |
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| isbn | 9781009397179 |
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| spelling | Sumrall, Colin D. 1967- (DE-588)1288740549 aut A review and evaluation of homology hypotheses in echinoderm paleobiology Colin D. Sumrall [und vier andere] Cambridge Cambridge University Press [2023] 44 Seiten Illustrationen, Diagramme txt rdacontent n rdamedia nc rdacarrier Cambridge elements The extraxial-axial theory (EAT) and universal elemental homology (UEH) are often portrayed as mutually exclusive hypotheses of homology within pentaradiate Echinodermata. EAT describes homology upon the echinoderm bauplan, interpreted through early post-metamorphic growth and growth zones, dividing it into axial regions generally associated with elements of the ambulacral system and extraxial regions that are not. UEH describes the detailed construction of the axial skeleton, dividing it into homologous plates and plate series based on symmetry, early growth, and function. These hypotheses are not in conflict; the latter is rooted in refinement of the former. Some interpretive differences arise because many of the morphologies described from eleutherozoan development are difficult to reconcile with Paleozoic forms. Conversely, many elements described for Paleozoic taxa by UEH, such as the peristomial border plates, are absent in eleutherozoans. This Element recommends these two hypotheses be used together to generate a better understanding of homology across Echinodermata Echinodermata, Fossil Echinodermata / Evolution Evolutionary paleobiology Paleobiology / Methodology Erscheint auch als Online-Ausgabe |
| spellingShingle | Sumrall, Colin D. 1967- A review and evaluation of homology hypotheses in echinoderm paleobiology Echinodermata, Fossil Echinodermata / Evolution Evolutionary paleobiology Paleobiology / Methodology |
| title | A review and evaluation of homology hypotheses in echinoderm paleobiology |
| title_auth | A review and evaluation of homology hypotheses in echinoderm paleobiology |
| title_exact_search | A review and evaluation of homology hypotheses in echinoderm paleobiology |
| title_exact_search_txtP | A review and evaluation of homology hypotheses in echinoderm paleobiology |
| title_full | A review and evaluation of homology hypotheses in echinoderm paleobiology Colin D. Sumrall [und vier andere] |
| title_fullStr | A review and evaluation of homology hypotheses in echinoderm paleobiology Colin D. Sumrall [und vier andere] |
| title_full_unstemmed | A review and evaluation of homology hypotheses in echinoderm paleobiology Colin D. Sumrall [und vier andere] |
| title_short | A review and evaluation of homology hypotheses in echinoderm paleobiology |
| title_sort | a review and evaluation of homology hypotheses in echinoderm paleobiology |
| topic | Echinodermata, Fossil Echinodermata / Evolution Evolutionary paleobiology Paleobiology / Methodology |
| topic_facet | Echinodermata, Fossil Echinodermata / Evolution Evolutionary paleobiology Paleobiology / Methodology |
| work_keys_str_mv | AT sumrallcolind areviewandevaluationofhomologyhypothesesinechinodermpaleobiology |