The Cambrian Fossil Record and the Origin of the Phyla
Abstract
Whilst the "Cambrian Explosion" continues to attract much attention from a wide range of earth and life scientists, the detailed patterns exhibited by the terminal Proterozoic-Early Cambrian biotas remain unclear, for reasons of systematics, biostratigraphy and biogeography. In particular, recent changes in absolute dating of the Cambrian have refined the period of time that the fossil record might be of most help in revealing the dynamics of the undoubted radiation taking place at this time. The famous exceptionally preserved faunas seem to be rather close temporally, and as yet reveal little about the earliest and critical period of evolution, deep in the Cambrian. Nevertheless, the most parsimonious interpretation of the Cambrian fossil record is that it represents a broadly accurate temporal picture of the origins of the bilaterian phyla.
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The first appearances of early Cambrian metazoan groups are clustered geochronologically by higher-rank phylogeny.
“The first appearances of these groups are clustered geochronologically by higher-rank phylogeny (Budd, 2003; Landing & Westrop, 2004; Li et al . 2007).”
From Chronology of early Cambrian biomineralization (2012) · cites this paper as Budd, 2003
The clustering of first appearances reflects the true sequence of divergence of high-ranking groups and implies rather late origins, probably near the Precambrian-Cambrian boundary, followed by rapid evolutionary radiation in the early Cambrian.
“Budd (2003) and Budd & Jensen (2000, 2003) argued that this clustering reflects the true sequence of divergence of these high-ranking groups and implies rather late origins, probably near the Precambrian-Cambrian boundary, followed by their rapid evolutionary radiation in the early Cambrian.”
From Chronology of early Cambrian biomineralization (2012) · cites this paper as Budd (2003)
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Functional morphology of a lobopod: case study of an onychophoran leg
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The genetic response to Snowball Earth: role of HSP90 in the Cambrian explosion
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Ediacaran Corumbella has a cataphract calcareous skeleton with controlled biomineralization
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Improvement of molecular phylogenetic inference and the phylogeny of Bilateria
Lartillot, N., & Philippe, H. (2009) · Oxford University Press eBooks · doi:10.1093/acprof:oso/9780199549429.003.0012 · Cited by 15 · see citing works
Recognition of Rare Microfossils Using Transfer Learning and Deep Residual Networks
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Did consciousness first evolve in the amniotes?
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Deciphering deuterostome phylogeny: molecular, morphological, and palaeontological perspectives
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The evolution of nervous system centralization
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Hirota, K., Tochino, N., Seto, M., Sasaki, T., Yoshida, M., & Setiamarga, D. H. E. (2023) · Marine Biology · doi:10.1007/s00227-023-04244-x · Cited by 8 · see citing works
Invertebrate Problematica: kinds, causes, and solutions
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The earliest fossil record of the animals and its significance
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Self-citationYang, X., Chang, C., Chen, Y., Topper, T. P., Liu, F., Liang, Y., Fang, R., & Zhang, Z. (2023) · Frontiers in Earth Science · doi:10.3389/feart.2023.1173846 · Cited by 5 · see citing works
Unravelling body plan and axial evolution in the Bilateria with molecular phylogenetic markers
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The role of arthropods in the development of continental biota
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The origins and evolution of the Ecdysozoa
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Origins of metazoan body plans: the larval revolution
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Evolution: Mapping Out Early Echinoderms
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Self-citationYun, H., Zhang, X., Brock, G. A., Han, J., Li, L., Pan, B., Li, G., & Joachim Reitner, A. (2025) · Communications Biology · doi:10.1038/s42003-025-08655-y · Cited by 3 · see citing works
Animal Evolution: Trilobites on Speed
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Rise of the Animal Kingdom and Epigenetic Mechanisms of Evolution
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How the cambrian exploded: Contingency in the history of science and life
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Marine and freshwater taxa: some numerical trends
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Paleontology: A Philosophical Introduction
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The animal in the genome: comparative genomics and evolution
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Early Cambrian Protomelission is a scleritomous eumetazoan but not a bryozoan or dasyclad algaPreprint
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mapping the origins of modern diversity
Jackson, I. S. C. (2012)
The genetic response to Snowball Earth: role of HSP90 in the Cambrian explosion
BAKER, M. (2008) · SciVee · doi:10.4016/7077.01
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The genetic response to Snowball Earth: role of HSP90 in the Cambrian explosion
BAKER, M. (2008) · SciVee · doi:10.4016/7077.03
(2009) · Oxford University Press eBooks · doi:10.1093/acprof:oso/9780199549429.002.0004
(2009) · Oxford University Press eBooks · doi:10.1093/acprof:oso/9780199549429.002.0003
(2009) · Oxford University Press eBooks · doi:10.1093/acprof:oso/9780199549429.002.0007
(2009) · Oxford University Press eBooks · doi:10.1093/acprof:oso/9780199549429.002.0008
- Authors
- Budd, G. E.
- Affiliations
- Uppsala University (SE)
- Corresponding author
- Budd, G. E.
- ORCID
- Budd, G. E.
- Venue
- Integrative and Comparative Biology
- Publisher
- Oxford University Press (OUP)
- Published
- 2003-02-01
- Volume
- 43
- Issue
- 1
- Pages
- 157-165
- ISSN
- 1540-7063 (ISSN-L)
- 1557-7023
- OpenAlex
- W2119179804
- Cited by
- 102
- References
- 64
- Citations by year
- 2025: 3 · 2023: 4 · 2022: 6 · 2021: 2 · 2020: 4 · 2019: 5 · 2018: 6 · 2017: 1 · 2016: 1 · 2015: 2 · 2014: 4 · 2013: 8 · 2012: 6
- FWCI
- 2.92
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Integrative and Comparative Biology (publishedVersion)
- PubMed (publishedVersion)
- BioOne Complete (BioOne) (submittedVersion)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Evolution and Paleontology Studies
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Evolutionary Biology
- Keywords
- Cambrian explosion, exceptional preservation, biogeography, biostratigraphy, evolutionary radiation
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