Genetic Meaning of Zooecial Chamber Shapes in Fossil Bryozoans: Fourier Analysis

Genetic Meaning of Zooecial Chamber Shapes in Fossil Bryozoans: Fourier Analysis

Fourier harmonic amplitudes quantitatively characterize chamber shapes of fossil tubular bryozoans. The odd-numbered harmonics, particularly the seventh, carry evolutionary information. The phenotypically plastic second and sixth harmonics measure zooecial orientation and packing, respectively. As a...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 1972-09, Vol.177 (4053), p.1000-1002
Hauptverfasser: Anstey, Robert L., Delmet, Dale A.
Format: Artikel
Sprache:eng
Schlagworte:
Cell culture techniques
Cell growth
Cell lines
Cell membranes
Evolution
Fossils
L cells
Macrophages
Ontogeny
Taxa
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Zusammenfassung:Fourier harmonic amplitudes quantitatively characterize chamber shapes of fossil tubular bryozoans. The odd-numbered harmonics, particularly the seventh, carry evolutionary information. The phenotypically plastic second and sixth harmonics measure zooecial orientation and packing, respectively. As a measure of crowding, the sixth harmonic reflects mechanistic growth response to paleoenvironmental conditions.
ISSN:0036-8075
1095-9203
DOI:10.1126/science.177.4053.1000