The DOI matches its Crossref record; 64 of the 66 references it cites were found in a registry or an index.
EARLY CAMBRIAN METAZOAN EGGS, EMBRYOS, AND PHOSPHATIC MICROFOSSILS FROM NORTHWESTERN CANADA
Open accessAbstract
Three-dimensionally phosphatized, spherical fossils, interpreted as metazoan eggs and embryos on the basis of taphonomic features and cleavage patterns, are reported for the first time from the Cambrian of North America. These microfossils occur with a phosphatized biota of skeletonized fossils, including specimens indicative of the earliest Cambrian Anabarites–Protohertzina Zone in the Wernecke Mountains of eastern Yukon Territory, northwestern Canada. They range in size from 0.25 mm to more than 1.0 mm in diameter and can be referred to two genera, Olivooides Qian, 1977 and Archaeooides Qian, 1977. The North American discovery extends the biogeographic range of earliest Cambrian eggs and embryos from coeval successions in China and Siberia, suggesting a wide geographic distribution of these taxa, and emphasizes the crucial role of local environmental and taphonomic conditions in preserving this phosphatic window into the record of early animal evolution. In addition to previously reported taxa, the phosphatized biota also include indeterminate spheroids, fused clusters of Protohertzina siciformis Missarzhevsky, 1973, the enigmatic rodlike fossil Zhejiangorhabdion comptum Yue and Zhao, 1993, phosphatized fossils, including Paradoxiconus typicalis Qian et al., 2001, protoconularid Carinachites sp., and phosphatic tubes assigned to Hyolithellus cf. H. isiticus Missarzhevsky, 1969, cf. Pseudorthotheca sp., and ?Rugatotheca sp.
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“Probably the earliest hyolithelminths are represented by Hyolithellus spp. from the Anabarites trisulcatus -Protohertzina anabarica AssemblageZoneofSouthChina”
From Chronology of early Cambrian biomineralization (2012) · cites this paper as Pyle et al . 2006
In the citing paper
“A probably coeval occurrence of Carinachites sp. is described from the upper Ingta Formation in northwestern Canada (Laurentia), also assigned to the Anabarites trisulcatus -Protohertzina anabarica Zone”
From Chronology of early Cambrian biomineralization (2012) · cites this paper as Pyle et al . 2006
Citations
Cites
Philosophical transactions of the Royal Society of London. B
Press, H. (1886) · Cited by 10,087
Annual Review of Earth and Planetary Sciences
Uchupi, E. (1993) · Geochimica et Cosmochimica Acta · doi:10.1016/0016-7037(93)90451-2 · Cited by 844
Early animal evolution: emerging views from comparative biology and geology
Knoll, A. H., & Carroll, S. B. (1999) · Science · doi:10.1126/science.284.5423.2129 · Cited by 821
Three-dimensional preservation of algae and animal embryos in a Neoproterozoic phosphorite
Xiao, S., Zhang, Y., & Knoll, A. H. (1998) · Nature · doi:10.1038/35318 · Cited by 783
Self-citationLoutit, T. S., Hardenbol, J., Vail, P. R., & BAUM, G. R. (1988) · SEPM (Society for Sedimentary Geology) eBooks · doi:10.2110/pec.88.01.0183 · Cited by 528
Molecular Evidence for Deep Precambrian Divergences Among Metazoan Phyla
Wray, G. A., Levinton, J. S., & Shapiro, L. H. (1996) · Science · doi:10.1126/science.274.5287.568 · Cited by 511
Origin of the metazoan phyla: Molecular clocks confirm paleontological estimates
Ayala, F. J., Rzhetsky, A., & Ayala, F. J. (1998) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.95.2.606 · Cited by 342
Suspect terranes and accretionary history of the Appalachian orogen
Williams, H., & Hatcher, R. D. (1982) · Geology · doi:10.1130/0091-7613(1982)10 · Cited by 325
Atlas of Marine Invertebrate Larvae
Young, C. M., Sewell, M. A., & Rice, M. E. (2003) · Aquaculture Research · doi:10.1046/j.1365-2109.2003.00819.x · Cited by 312
Phosphorus, phosphorites and skeletal evolution at the Precambrian—Cambrian boundary
Cook, P. J., & Shergold, J. H. (1984) · Nature · doi:10.1038/308231a0 · Cited by 298
Research works printed but not linked: 3
- D. K. Bhatt, V. D. Mamgain, and R. S. Misra .1985 .Small shelly fossils of early Cambrian (Tommotian) age from Chert-Phosphorite Member, Tal Formation, Mussoorie Syncline, Lesser Himalaya, India and their chronostratigraphic evaluation., Journal of the Palaeontological Society of India, 30 :92 –102 .
- 10.1130/0091-7613(2000)28<423:NLATSC>2.0.CO;2 · DOI
- S. Xiao, and A. H. Knoll .2000 .Phosphatized animal embryos from the Neoproterozoic Duoshantuo Formation at Weng'an, Guizhou, South China., Journal of Paleontology, 74 :767 –788 .
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Chronology of early Cambrian biomineralization
KOUCHINSKY, A., BENGTSON, S., RUNNEGAR, B., SKOVSTED, C., STEINER, M., & VENDRASCO, M. (2012) · Geological Magazine · doi:10.1017/s0016756811000720 · Cited by 224
“A probably coeval occurrence of Carinachites sp. is described from the upper Ingta Formation in northwestern Canada (Laurentia), also assigned to the Anabarites trisulcatus–Protohertzina anabarica Zone (Pyle et al. 2006; online Appendices 1, 2 at http://journals.cambridge.org/geo; Fig.”
BackgroundInfluentialMacdonald, F. A., Strauss, J. V., Sperling, E. A., Halverson, G. P., Narbonne, G. M., Johnston, D. T., Kunzmann, M., Schrag, D. P., & Higgins, J. A. (2013) · Chemical Geology · doi:10.1016/j.chemgeo.2013.05.032 · Cited by 200
“Current work is being carried out in attempt to refine the local relationship between the Risky excursion, paleokarst development, and the FADs of complex trace fossils and small shelly fossils in the overlying Ingta Formation.”
BackgroundInfluentialSelf-citationZhu, M., Zhuravlev, A. Y., Wood, R. A., Zhao, F., & Sukhov, S. S. (2017) · Geology · doi:10.1130/g38865.1 · Cited by 176
Muscente, A. D., Hawkins, A. D., & Xiao, S. (2014) · Palaeogeography Palaeoclimatology Palaeoecology · doi:10.1016/j.palaeo.2014.10.013 · Cited by 148
“Comparable fossils—including filaments (Brasier and Callow, 2007) and animal eggs and embryos (Zhang and Pratt, 1994; Bengtson and Yue, 1997; Kouchinsky et al., 1999; Donoghue et al., 2006a; Donoghue et al., 2006b; Pyle et al., 2006)—also occur in the early Cambrian Period.”
BackgroundSelf-citationYang, B., Steiner, M., Zhu, M., Li, G., Liu, J., & Liu, P. (2016) · Precambrian Research · doi:10.1016/j.precamres.2016.09.016 · Cited by 120
Metadata
- Authors
- PYLE, L. J., NARBONNE, G. M., NOWLAN, G. S., XIAO, S., & JAMES, N. P.
- Affiliations
- Geological Survey of Canada (CA)
- Queen's University (CA)
- Virginia Tech (US)
- Venue
- Journal of Paleontology
- Publisher
- Cambridge University Press (CUP)
- Published
- 2006-09
- Volume
- 80
- Issue
- 5
- Pages
- 811-825
- ISSN
- 0022-3360 (ISSN-L)
- 1937-2337
- OpenAlex
- W2192078201
- Cited by
- 46
- References
- 66
- Citations by year
- 2026: 4 · 2024: 5 · 2023: 2 · 2022: 4 · 2021: 5 · 2020: 2 · 2019: 1 · 2018: 2 · 2017: 4 · 2016: 3 · 2015: 1 · 2014: 3 · 2013: 2 · 2012: 1
- FWCI
- 0.84
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Journal of Paleontology (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 › Paleontology and Evolutionary Biology
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Evolution and Paleontology Studies
- Keywords
- Lower Cambrian, embryo, phosphatization, Yukon, taphonomy, cleavage pattern, biogeographic range, early animal evolution
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- CoChat. (2026). Citation check: EARLY CAMBRIAN METAZOAN EGGS, EMBRYOS, AND PHOSPHATIC MICROFOSSILS FROM NORTHWESTERN CANADA. https://app.cochat.ai/papers/10.1666/0022-3360(2006)80%5B811:ecmeea%5D2.0.co;2
- The paper
- PYLE, L. J., NARBONNE, G. M., NOWLAN, G. S., XIAO, S., & JAMES, N. P. (2006). EARLY CAMBRIAN METAZOAN EGGS, EMBRYOS, AND PHOSPHATIC MICROFOSSILS FROM NORTHWESTERN CANADA. Journal of Paleontology. https://doi.org/10.1666/0022-3360(2006)80%5B811%3Aecmeea%5D2.0.co%3B2
