A Parvancorina -like arthropod from the Cambrian of South China
Abstract
Constraining the origin of animal groups is allowed, to some extent, by discoveries of Cambrian Lagerstätten that preserve both mineralizing and nonmineralizing organisms. A new species is reported here of the Cambrian arthropod Skania, which bears an exoskeleton that shares homologies with the Neoproterozoic (Ediacaran) organism Parvancorina and firmly establishes a Precambrian root for arthropods. A new monophyletic group, Parvancorinomorpha, is proposed as the first clade within the arthropod crown group demonstrably ranging across the Neoproterozoic–Paleozoic transition. The Parvancorinomorpha is interpreted to be the sister group of the Arachnomorpha. Incipient cephalization in Skania and related genera represents a step in the progression toward division of a cephalon from a large posterior trunk as shown in Cambrian arachnomorphs such as naraoiids and the addition of a pygidium and thoracic tergites as shown in the arachnomorph clade basal to trilobites. This evidence can serve as a new calibration point for estimating the divergence time for the last common ancestor of arthropods and priapulids based on molecular clock methods.
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Parvancorina bears a striking resemblance in external form to the unmineralized kite-shaped Cambrian arthropod Skania.
“in external form, Parvancorina bears a striking resemblance to the unmineralized kite-shaped Cambrian arthropod Skania (Lin et al. 2006).”
From The Ediacaran emergence of bilaterians: congruence between the genetic and the geological fossil records (2008) · cites this paper as Lin et al. 2006
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- Authors
- Lin, J.-P., Gon, S. M., Gehling, J. G., Babcock, L. E., Zhao, Y.-L., Zhang, X.-L., Hu, S.-X., Yuan, J.-L., Yu, M.-Y., & Peng, J.
- Affiliations
- The Ohio State University (US)
- The Nature Conservancy (US)
- Guizhou University (CN)
- Corresponding author
- Lin, Jih-Pai
- Venue
- Historical Biology
- Publisher
- Informa UK Limited
- Published
- 2006-01
- Volume
- 18
- Issue
- 1
- Pages
- 33-45
- ISSN
- 0891-2963 (ISSN-L)
- 1029-2381
- OpenAlex
- W2152628496
- Cited by
- 53
- References
- 20
- Citations by year
- 2025: 2 · 2024: 1 · 2023: 1 · 2022: 1 · 2019: 3 · 2018: 2 · 2017: 3 · 2016: 6 · 2015: 3 · 2014: 2 · 2013: 2 · 2012: 2
- FWCI
- 5.28
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Historical Biology (publishedVersion)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Evolutionary Biology
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Evolution and Paleontology Studies
- Keywords
- Cambrian arthropods, Ediacaran, cephalization, pygidium, divergence time calibration, priapulids, South China
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