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Presence of the Earliest Vertebrate Hard Tissue in Conodonts
Abstract
From histological investigations into the microstructure of conodont elements, a number of tissue types characteristic of the phosphatic skeleton of vertebrates have been identified. These include cellular bone, two forms of hypermineralized enamel homologs, and globular calcified cartilage. The presence of cellular bone in conodont elements provides unequivocal evidence for their vertebrate affinities. Furthermore, the identification of vertebrate hard tissues in the oral elements of conodonts extends the earliest occurrence of vertebrate hard tissues back by around 40 million years, from the Middle Ordovician (475 million years ago) to the Late Cambrian (515 million years ago).
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Cited by
The fossil record and the early evolution of the Metazoa
Morris, S. C. (1993) · Nature · doi:10.1038/361219a0 · Cited by 389
Conodont affinity and chordate phylogeny
DONOGHUE, P. C. J., FOREY, P. L., & ALDRIDGE, R. J. (2000) · Biological Reviews of the Cambridge Philosophical Society · doi:10.1017/s0006323199005472 · Cited by 328
Origin and early evolution of vertebrate skeletonization
Donoghue, P. C. J., & Sansom, I. J. (2002) · Microscopy Research and Technique · doi:10.1002/jemt.10217 · Cited by 232
Self-citationDonoghue, P. C. J., Sansom, I. J., & Downs, J. P. (2006) · Journal of Experimental Zoology Part B: Molecular and Developmental Evolution · doi:10.1002/jez.b.21090 · Cited by 182
Self-citationThe plankton and the benthos: origins and early history of an evolving relationship
Signor, P. W., & Vermeij, G. J. (1994) · Paleobiology · doi:10.1017/s0094837300012793 · Cited by 147
Metadata
- Authors
- Sansom, I. J., Smith, M. P., Armstrong, H. A., & Smith, M. M.
- Venue
- Science
- Published
- 1992-05-29
- Volume
- 256
- Issue
- 5061
- Pages
- 1308-1311
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W1991633942
- Cited by
- 169
- References
- 0
- FWCI
- 20.15
- Type
- journal article
- Language
- en
- Open access
- closed
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- Sansom, I. J., Smith, M. P., Armstrong, H. A., & Smith, M. M. (1992). Presence of the Earliest Vertebrate Hard Tissue in Conodonts. Science. https://doi.org/10.1126/science.1598573
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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