Morphometric investigation of Tribrachidium from Nilpena Ediacara National Park, South Australia
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作者:
Botha, Tory L.
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Univ Adelaide, Sch Biol Sci, Fac Sci Engn & Technol, North Terrace, Adelaide, SA, AustraliaUniv Adelaide, Sch Biol Sci, Fac Sci Engn & Technol, North Terrace, Adelaide, SA, Australia
Botha, Tory L.
[1
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Droser, Mary L.
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Univ Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA USAUniv Adelaide, Sch Biol Sci, Fac Sci Engn & Technol, North Terrace, Adelaide, SA, Australia
Droser, Mary L.
[2
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Garcia-Bellido, Diego C.
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Univ Adelaide, Sch Biol Sci, Fac Sci Engn & Technol, North Terrace, Adelaide, SA, Australia
South Australian Museum, Earth Sci Sect, North Terrace, Adelaide, SA, AustraliaUniv Adelaide, Sch Biol Sci, Fac Sci Engn & Technol, North Terrace, Adelaide, SA, Australia
Garcia-Bellido, Diego C.
[1
,3
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Sherratt, Emma
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Univ Adelaide, Sch Biol Sci, Fac Sci Engn & Technol, North Terrace, Adelaide, SA, AustraliaUniv Adelaide, Sch Biol Sci, Fac Sci Engn & Technol, North Terrace, Adelaide, SA, Australia
Sherratt, Emma
[1
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机构:
[1] Univ Adelaide, Sch Biol Sci, Fac Sci Engn & Technol, North Terrace, Adelaide, SA, Australia
[2] Univ Calif Riverside, Dept Earth & Planetary Sci, Riverside, CA USA
[3] South Australian Museum, Earth Sci Sect, North Terrace, Adelaide, SA, Australia
Nilpena Ediacara National Park (South Australia) preserves over 200 specimens of Tribrachidium heraldicum and 95 specimens of the newly described Tribrachidium gehlingi within the fossiliferous Ediacara Member. We use rotational geometric morphometrics to quantify the morphological variation within each species and the differences between the two. Both species were found to be morphologically different from one another, forming distinct groups within the morphospace. Analysis of the symmetric and asymmetric shape components revealed that both species present limited deformation, suggesting they consisted of a fairly resistant material. Growth appears to have been comprised of various interacting allometric relationships that maintain a consistent overall morphology for both species, possibly constrained by its suspension feeding mode.
机构:
Univ Adelaide, Fac Sci Engn & Technol, Sch Biol Sci, North Terrace, SA, AustraliaUniv Adelaide, Fac Sci Engn & Technol, Sch Biol Sci, North Terrace, SA, Australia
Botha, Tory L.
Garcia-Bellido, Diego C.
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Univ Adelaide, Fac Sci Engn & Technol, Sch Biol Sci, North Terrace, SA, Australia
South Australian Museum, Earth Sci Sect, Adelaide, SA 5000, AustraliaUniv Adelaide, Fac Sci Engn & Technol, Sch Biol Sci, North Terrace, SA, Australia
机构:
Univ Calif Riverside, Dept Earth Sci, Riverside, CA 92521 USAUniv Calif Riverside, Dept Earth Sci, Riverside, CA 92521 USA
Hall, Christine M. S.
Droser, Mary L.
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Univ Calif Riverside, Dept Earth Sci, Riverside, CA 92521 USAUniv Calif Riverside, Dept Earth Sci, Riverside, CA 92521 USA
Droser, Mary L.
Gehling, James G.
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S Australian Museum, Adelaide, SA 5000, Australia
Univ Adelaide, Adelaide, SA 5000, AustraliaUniv Calif Riverside, Dept Earth Sci, Riverside, CA 92521 USA
Gehling, James G.
Dzaugis, Mary E.
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Univ Rhode Isl, Grad Sch Oceanog, Narragansett, RI 02882 USAUniv Calif Riverside, Dept Earth Sci, Riverside, CA 92521 USA