Palaeobiology of the reclining rangeomorph Beothukis from the Ediacaran Mistaken Point Formation of southeastern Newfoundland
Abstract Beothukis mistakensis from the Ediacaran System of Newfoundland, Canada demonstrates complex fractal-like morphology through the development of primary-, secondary- and tertiary-order Rangea-like units. The primary-order rangeomorph units observed in B. mistakensis are tightly juxtaposed, s...
Published in: | Geological Magazine |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
2020
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0016756820000941 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756820000941 |
id |
crcambridgeupr:10.1017/s0016756820000941 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0016756820000941 2024-09-15T18:19:56+00:00 Palaeobiology of the reclining rangeomorph Beothukis from the Ediacaran Mistaken Point Formation of southeastern Newfoundland McIlroy, Duncan Hawco, Jessica McKean, Christopher Nicholls, Robert Pasinetti, Giovanni Taylor, Rod 2020 http://dx.doi.org/10.1017/s0016756820000941 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756820000941 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Geological Magazine volume 159, issue 7, page 1160-1174 ISSN 0016-7568 1469-5081 journal-article 2020 crcambridgeupr https://doi.org/10.1017/s0016756820000941 2024-09-04T04:04:50Z Abstract Beothukis mistakensis from the Ediacaran System of Newfoundland, Canada demonstrates complex fractal-like morphology through the development of primary-, secondary- and tertiary-order Rangea-like units. The primary-order rangeomorph units observed in B. mistakensis are tightly juxtaposed, show no evidence of being independent of one another and are made up of chamber-like secondary-order – probably mesoglea-filled – units. The growth of these rangeomorph units demonstrates that the frond developed from the tip towards the basal region through ontogeny. The tertiary-order units of Beothukis are considered to represent surface morphology on the secondary-order units. This is in contrast to palaeobiological reconstructions of Beothukis that invoke three-dimensional fractal-like branches with independent units, which has been used to infer an osmotrophic mode of life. It is considered here that the fractal-like morphology of the lower surface of B. mistakensis was an adaptation to increase surface area to volume ratio. The quilted morphology of Beothukis proposed here is consistent with a sessile, reclining, phagocytotic and/or chemosymbiotic mode of life similar to that invoked for the reclining rangeomorph Fractofusus . Article in Journal/Newspaper Newfoundland Cambridge University Press Geological Magazine 1 15 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
description |
Abstract Beothukis mistakensis from the Ediacaran System of Newfoundland, Canada demonstrates complex fractal-like morphology through the development of primary-, secondary- and tertiary-order Rangea-like units. The primary-order rangeomorph units observed in B. mistakensis are tightly juxtaposed, show no evidence of being independent of one another and are made up of chamber-like secondary-order – probably mesoglea-filled – units. The growth of these rangeomorph units demonstrates that the frond developed from the tip towards the basal region through ontogeny. The tertiary-order units of Beothukis are considered to represent surface morphology on the secondary-order units. This is in contrast to palaeobiological reconstructions of Beothukis that invoke three-dimensional fractal-like branches with independent units, which has been used to infer an osmotrophic mode of life. It is considered here that the fractal-like morphology of the lower surface of B. mistakensis was an adaptation to increase surface area to volume ratio. The quilted morphology of Beothukis proposed here is consistent with a sessile, reclining, phagocytotic and/or chemosymbiotic mode of life similar to that invoked for the reclining rangeomorph Fractofusus . |
format |
Article in Journal/Newspaper |
author |
McIlroy, Duncan Hawco, Jessica McKean, Christopher Nicholls, Robert Pasinetti, Giovanni Taylor, Rod |
spellingShingle |
McIlroy, Duncan Hawco, Jessica McKean, Christopher Nicholls, Robert Pasinetti, Giovanni Taylor, Rod Palaeobiology of the reclining rangeomorph Beothukis from the Ediacaran Mistaken Point Formation of southeastern Newfoundland |
author_facet |
McIlroy, Duncan Hawco, Jessica McKean, Christopher Nicholls, Robert Pasinetti, Giovanni Taylor, Rod |
author_sort |
McIlroy, Duncan |
title |
Palaeobiology of the reclining rangeomorph Beothukis from the Ediacaran Mistaken Point Formation of southeastern Newfoundland |
title_short |
Palaeobiology of the reclining rangeomorph Beothukis from the Ediacaran Mistaken Point Formation of southeastern Newfoundland |
title_full |
Palaeobiology of the reclining rangeomorph Beothukis from the Ediacaran Mistaken Point Formation of southeastern Newfoundland |
title_fullStr |
Palaeobiology of the reclining rangeomorph Beothukis from the Ediacaran Mistaken Point Formation of southeastern Newfoundland |
title_full_unstemmed |
Palaeobiology of the reclining rangeomorph Beothukis from the Ediacaran Mistaken Point Formation of southeastern Newfoundland |
title_sort |
palaeobiology of the reclining rangeomorph beothukis from the ediacaran mistaken point formation of southeastern newfoundland |
publisher |
Cambridge University Press (CUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1017/s0016756820000941 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0016756820000941 |
genre |
Newfoundland |
genre_facet |
Newfoundland |
op_source |
Geological Magazine volume 159, issue 7, page 1160-1174 ISSN 0016-7568 1469-5081 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0016756820000941 |
container_title |
Geological Magazine |
container_start_page |
1 |
op_container_end_page |
15 |
_version_ |
1810458293459484672 |