Ecdysozoa: References

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Almeida WO, Christoffersen ML, Amorim DS, Eloy ECC. 2008 Morphological support for the phylogenetic positioning of Pentastomida and related fossils. Biotemas 21:81–90.pdf
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Budd, G. E. (2001). Tardigrades as "stem-group arthropods": the evidence from the Cambrian fauna. Zoologischer Anzeiger, 240, 265–279. pdf
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Graham E. Budd & Maximilian J. Telford, 2009, The origin and evolution of arthropods Nature 457, 812-817 (12 February 2009) pdf
Ecdysozoa - Phylogeny

Campbell, L.I., Rota-Stabelli, O., Edgecombe, G.D., Marchioro, T., Longhorn, S.J., Telford, M.J., Philippe, H., Rebecchi, L., Peterson, K.J., and Pisani D. (2011) MicroRNAs and phylogenomics resolve the relationships of Tardigrada and suggest that velvet worms are the sister group of Arthropoda.Proceedings of the National Academy of Science, USA. doi: 10.1073/pnas.1105499108 online
Ecdysozoa - Phylogeny

Cavalier-Smith T (August 1998). "A revised six-kingdom system of life". Biol Rev Camb Philos Soc 73 (3): 203–66. doi:10.1111/j.1469-185X.1998.tb00030.x. PMID 9809012.
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Conway Morris, S (1993), The fossil record and early evolution of the Metazoa. Nature 361: 219-225.
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Daley, C.; Budd, E.; Caron, B.; Edgecombe, D.; Collins, D.; (2009). "The Burgess Shale Anomalocaridid Hurdia and its Significance for Early Euarthropod Evolution". Science 323 (5921): 1597–1600. Bibcode 2009Sci...323.1597D. doi:10.1126/science.1169514. ISSN 0036-8075. PMID 19299617. pdf supporting info
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Xi-ping Dong, Philip C. J. Donoghue, John A. Cunningham, Jian-bo Liu, and Hong Cheng, 2005, The anatomy, affinity, and phylogenetic significance of Markuelia. Evolution & Development 7:5, 468-482 pdf
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Dunn et al., CW; Hejnol, A; Matus, DQ; Pang, K; Browne, WE; Smith, SA; Seaver, E; Rouse, GW et al (2008). "Broad phylogenomic sampling improves resolution of the animal tree of life". Nature 452 (7188): 745–749. doi:10.1038/nature06614. PMID 18322464.
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Dzik, J., and Krumbiegel, G. 1989. The oldest 'onychophoran' Xenusion: a link connecting phyla? Lethaia 22: 169–182.
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Edgecombe, G.D. 2009, Palaeontological and molecular evidence linking arthropods, onychophorans and other Ecdysozoa. Evolution: Education and Outreach 2: 178-190. 10.1007/s12052-009-0118-3 pdf
Overview

Edgecombe, G. D., G. Giribet, C. W. Dunn, A. Hejnol,R. M. Kristensen, R. C. Neves, G. W. Rouse, K. Worsaae, and M. V. Sorensen. 2011. Higher-level metazoan relationships: recent progress and remaining questions. Organisms Diversity and Evolution. DOI 10.1007/s13127-011-0044-4.
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Giribet G, & C Ribera (1998), The position of arthropods in the animal kingdom: a search for a reliable outgroup for internal arthropod phylogeny. Mol Phylogen. Evol. 9: 481-488.
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Harvey, T., Dong, X. & Donoghue, C. 2010. Are palaeoscolecids ancestral ecdysozoans? Evolution and Development 12, 177-200. pdf
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Liu J, Shu D, Han J, Zhang Z, Zhang X. Origin, diversification, and relationships of Cambrian lobopods. Gondwana Res. 2008;14:277–83.
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Margulis, L. and K. Schwartz. 1982. Five kingdoms, an illustrated guide to the phyla of life on earth. W. H. Freeman and Co. New York.
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Peterson, KJ & DJ Eernisse (2001), Animal phylogeny and the ancestry of bilaterians: inferences from morphology and 18S rDNA gene sequences. Evol. Devel. 3: 170-205.
Ecdysozoa - Phylogeny

Omar Rota-Stabelli, Lahcen Campbell, Henner Brinkmann, Gregory D. Edgecombe, Stuart J. Longhorn, Kevin J. Peterson, Davide Pisani, Hervé Philippe and Maximilian J. Telford 2010. A congruent solution to arthropod phylogeny: phylogenomics, microRNAs and morphology support monophyletic Mandibulata. Proc. R. Soc. B, doi: 10.1098/rspb.2010.0590 published online 11 August 2010 WWW
Ecdysozoa - Phylogeny

Steiner, M., Hu, S.X., Liu, J. & Keupp, H. 2012. A new species of Hallucigenia from the Cambrian Stage 4 Wulongqing Formation of Yunnan (South China) and the structure of sclerites in lobopodians. Bulletin of Geosciences 87(1), 107–124 (11 figures, 2 tables). Czech Geological Survey, Prague. ISSN 1214-1119. pdf
Ecdysozoa - Phylogeny

Telford MJ, Bourlat SJ, Economou A, Papillon D, Rota-Stabelli O (April 2008). "The evolution of the Ecdysozoa". Philos. Trans. R. Soc. Lond., B, Biol. Sci. 363 (1496): 1529–37. doi:10.1098/rstb.2007.2243. PMC 2614232. PMID 18192181
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Winnepennickyx, BMH, T Backeljau, & RM Kristensen (1998), Relationships of a new phylum Cycliophora. Nature 393: 636-638.
Ecdysozoa - Phylogeny

Andrey Yu. Zhuravlev, José Antonio Gámez Vintaned, and Eladio Liñán, 2011, The Palaeoscolecida and the evolution of the Ecdysozoa, From: Johnston, P.A., and Johnston K.J. (eds.), 2011. International Conference on the Cambrian Explosion, Proceedings. Palaeontographica Canadiana No. 31: 177–204. Joint Committee on Paleontological Monographs for CSPG/GAC pdf
Ecdysozoa - Phylogeny