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Phylogeny of the Metazoa Based on Morphological and 18S Ribosomal DNA Evidence
Abstract
Cladistic analysis of traditional (i.e. morphological, developmental, ultrastructural) and molecular (18S rDNA) data sets (276+501 informative characters) provides a hypothesis about relationships of all meta-zoan higher taxa. Monophyly of Metazoa, Epith-eliozoa (= -03non-Porifera), Triploblastica, Mesozoa, Eutriploblastica (=Rhabditophora+Catenulida+"higher triploblasts"=Neotriploblastica, including Xeno- turbellida and Gnathostomulida), Rhabditophora, Syndermata (="Rotifera"+Acanthocephala), Neotrichozoa (=Gastrotricha+Gnathostomulida), Nematozoa (=Nematoda+Nematomorpha), Panarthropoda (=Onychophora+Tardigrada+ Arthropoda), Cephalorhyncha, Deuterostomia, Ambulacralia (=Hemichordata+Echinodermata), Chordata, Phoronozoa (=Phoronida+"Brachiopoda"), Bryozoa, Trochozoa (=Eutrochozoa+Entoprocta+ Cycliophora), Eutrochozoa, and Chaetifera (=Annelida+ Pogonophora+Echiura) is strongly supported. Cnidaria (including Myxozoa), Ecdysozoa (=Cepha- lorhyncha + Nematozoa + Chaetognatha + Panarthropoda), Eucoelomata (=Bryozoa+Phoronozoa+Deuterostomia+Trochozoa, possibly including also Xenoturbellida), and Deuterostomia+Phoronozoa probably are monophyletic. Most traditional "phyla" are monophyletic, except for Porifera, Cnidaria (excluding Myxozoa), Platyhelminthes, Brachiopoda, and Rotifera. Three "hot" regions of the tree remain quite unresolved: basal Epitheliozoa, basal Triploblastica, and basal Neotriploblastica. A new phylogenetic classification of the Metazoa including 35 formally recognized phyla (Silicispongea, Calcispongea, Placozoa, Cnidaria, Ctenophora, Acoela, Nemertodermatida, Orthonecta, Rhombozoa, Rhabditophora, Catenulida, Syndermata, Gnathostomulida, Gastrotricha, Cephalorhyncha, Chaetognatha, Nematoda, Nematomorpha, Onychophora, Tardigrada, Arthropoda, Echinodermata, Hemichordata, Chordata, Phoronozoa, Bryozoa s. str., Xenoturbellida, Entoprocta, Cycliophora, Nemertea, Mollusca, Sipuncula, Echiura, Pogonophora, and Annelida) and few i ncertae sedis g roups (e.g. Myzostomida and Lobatocerebromorpha) is proposed.
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Evidence for a clade of nematodes, arthropods and other moulting animals
Aguinaldo, A. M. A., Turbeville, J. M., Linford, L. S., Rivera, M. C., Garey, J. R., Raff, R. A., & Lake, J. A. (1997) · Nature · doi:10.1038/387489a0 · Cited by 1,609
The fossil record and the early evolution of the Metazoa
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Evidence from 12 S Ribosomal RNA Sequences that Onychophorans Are Modified Arthropods
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Sponge phylogeny, animal monophyly, and the origin of the nervous system: 18S rRNA evidence
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Multicellular Animals: A new Approach to the Phylogenetic Order in Nature Volume 1
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Tunicates and not cephalochordates are the closest living relatives of vertebrates
Delsuc, F., Brinkmann, H., Chourrout, D., & Philippe, H. (2006) · Nature · doi:10.1038/nature04336 · Cited by 1,651
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The new animal phylogeny: Reliability and implications
Adoutte, A., Balavoine, G., Lartillot, N., Lespinet, O., Prud'homme, B., & de Rosa, R. (2000) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.97.9.4453 · Cited by 512
The New View of Animal Phylogeny
Halanych, K. M. (2004) · Annual Review of Ecology, Evolution, and Systematics · doi:10.1146/annurev.ecolsys.35.112202.130124 · Cited by 489
Animal phylogeny and its evolutionary implications
Dunn, C. W., Giribet, G., Edgecombe, G. D., & Hejnol, A. (2014) · Annual Review of Ecology, Evolution, and Systematics · doi:10.1146/annurev-ecolsys-120213-091627 · Cited by 401
Metadata
- Authors
- Zrzavý, J.
- Venue
- Cladistics
- Publisher
- Wiley
- Published
- 1998-09
- Volume
- 14
- Issue
- 3
- Pages
- 249-285
- ISSN
- 0748-3007 (ISSN-L)
- OpenAlex
- W2140993348
- Cited by
- 438
- References
- 6
- FWCI
- 22.48
- Type
- journal article
- Language
- en
- Open access
- closed
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