Reference health
Lower Cambrian vertebrates from south China
20/20 checkable references clean · checked 2026-08-16
Every reference with a DOI in the deposited reference list resolved to a known work in Crossref or DataCite at the dated check, and none carried a retraction, withdrawal, or removal notice.
14 without a DOI — not checked. A reference deposited without a DOI is never matched by title or guessed at; it stays outside the checked set, and this line discloses that.
The 20 checked references that resolve
resolves10.1242/dev.126.5.851
Fossils, molecules and embryos: new perspectives on the Cambrian explosion
resolves10.1098/rstb.1995.0029
Articulated halkieriids from the Lower Cambrian of North Greenland and their role in early protostome evolution
resolves10.1080/11250009309355797
New animals from the Burgess Shale (Middle Cambrian) and their possible significance for the understanding of the Bilateria
resolves10.1111/j.1502-3931.1998.tb00509.x
Conodont anatomy, chordate phylogeny and vertebrate classification
resolves10.1080/02724634.1997.10010948
Ordovician microvertebrate remains from the Amadeus Basin, central Australia
resolves10.1139/e97-107
Duration of the Early Cambrian: U-Pb ages of volcanic ashes from Avalon and Gondwana
resolves10.1139/e17-059
U – Pb zircon date from Avalonian Cape Breton Island and geochronologic calibration of the Early Ordovician
resolves10.1073/pnas.95.21.12386
Testing the Cambrian explosion hypothesis by using a molecular dating technique
resolves10.1073/pnas.95.2.606
Origin of the metazoan phyla: Molecular clocks confirm paleontological estimates
The 14 references without a DOI — listed, not checked
no DOI — not checkedConway Morris,S. The Crucible of Creation: The Burgess Shale and the Rise of Animals (Cambridge Univ. Press, Cambridge, 1998).
no DOI — not checkedBudd,G. E. in Arthropod Relationships (eds Fortey, R. A. & Thomas, R. H.) Syst. Ass. Spec. Vol. 55, 125–138 (1997).
no DOI — not checkedShu, D-G., Conway Morris,S. & Zhang, X-L. A Pikaia-like chordate from the Lower Cambrian of China. Nature 384, 156–157 (1996).
no DOI — not checkedConway Morris,S. in Atlas of the Burgess Shale (ed. Conway Morris, S.) 26 (Palaeontological Association, London, 1982).
no DOI — not checkedBriggs,D. E. G., Erwin,D. H. & Collier,F. J. The Fossils of the Burgess Shale (Smithsonian, Washington, 1994).
no DOI — not checkedLuo,H. et al. New occurrence of the early Cambrian Chengjiang fauna from Haikou, Kunming, Yunnan province. Acta. Geol. Sin. 71, 97–104 (1997).
no DOI — not checkedMarinelli,W. & Strenger,A. Vergleichende Anatomie und Morphologie der Wirbeltiere, 1. Lampetra fluviatilis (L.) (Franz Deuticke, Vienna, 1954).
no DOI — not checkedMarinelli,W. & Strenger,A. Vergleichende Anatomie und Morphologie der Wirbeltiere, 2. Myxine glutinosa (L.) (Franz Deuticke, Vienna, 1956).
no DOI — not checkedChen, J-Y. & Zhou, G-Q. Biology of the Chengjiang fauna. Bull. Natl Mus. Nat. Sci. Taiwan 10, 11–105 (1997).
no DOI — not checkedJanvier,P. The dawn of the vertebrates: character versus common ascent in the rise of current vertebrate phylogenies. Palaeontology 39, 259–287 (1996).
no DOI — not checkedForey,P. L. & Janvier,P. Evolution of the early vertebrates. Am. Sci. 82, 554–565 (1994).
no DOI — not checkedGoodrich,E. S. Notes on the development, structure, and origin of the median and paired fins of fish. Q. J. Microsc. Sci. 50, 333–376 (1906).
no DOI — not checkedRitchie,A. New evidence on Jamoytius kerwoodi, an important ostracoderm from the Silurian of Lanarkshire. Palaeontology 11, 21–39 (1968).
no DOI — not checkedChen, J-Y. & Li,C. Early Cambrian chordate from Chengjiang, China. Bull. Natl Mus. Nat. Sci. Taiwan 10, 257–273 (1997).
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