Evidence for a clade of nematodes, arthropods and other moulting animals

@article{Aguinaldo1997EvidenceFA,
  title={Evidence for a clade of nematodes, arthropods and other moulting animals},
  author={Anna Marie A. Aguinaldo and James M. Turbeville and Lawrence S. Linford and Maria C. Rivera and James R. Garey and Rudolf A. Raff and James Alan Lake},
  journal={Nature},
  year={1997},
  volume={387},
  pages={489-493}
}
The arthropods constitute the most diverse animal group, but, despite their rich fossil record and a century of study, their phylogenetic relationships remain unclear1. Taxa previously proposed to be sister groups to the arthropods include Annelida, Onychophora, Tardigrada and others, but hypotheses of phylogenetic relationships have been conflicting2,3. For example, onychophorans, like arthropods, moult periodically, have an arthropod arrangement of haemocoel1,4, and have been related to… Expand
The position of arthropods in the animal kingdom: a search for a reliable outgroup for internal arthropod phylogeny.
TLDR
A cladistic approach to metazoan evolution including 133 18S rDNA sequences of 31 animal phyla is reported, suggesting that the Bilateria and Protostomia are monophyletic. Expand
Palaeontological and Molecular Evidence Linking Arthropods, Onychophorans, and other Ecdysozoa
TLDR
Analysis of DNA sequences from many genes together with morphological characters involving the cuticle and its molting strengthen the grouping of cycloneuralian worms and arthropods as Ecdysozoa, identify the velvet worms (Phylum Onychophora) as the closest living relatives of arthropoda, and interpret segmentation as having separate evolutionary origins in arthropod and annelid worms. Expand
Reevaluating the arthropod tree of life.
TLDR
Monophyly of Pycnogonida, Euchelicerata, Myriapoda, Tetraconata, and Hexapoda is well supported, but the interrelationships of arachnid orders and the details of crustacean paraphyly with respect to Hexapda remain the major unsolved phylogenetic problems. Expand
Ecdysozoan Mitogenomics: Evidence for a Common Origin of the Legged Invertebrates, the Panarthropoda
TLDR
Phylogenetic analyses based on concatenated amino acid coding sequences support a monophyletic origin of the Ecdysozoa and the position of Priapulida as the sister group of a monophysletic Panarthropoda (Tardigrada plus Onychophora plus Arthropoda). Expand
MicroRNAs and phylogenomics resolve the relationships of Tardigrada and suggest that velvet worms are the sister group of Arthropoda
TLDR
The study confirms the monophyly of the legged ecdysozoans, shows that past support for a Tardigrada + Nematoda group was due to long-branch attraction, and suggests that the velvet worms are the sister group to the arthropods. Expand
The Articulata hypothesis – or what is a segment?
TLDR
Based on numerous similarities not shared with other bilaterian taxa it is suggested that segmentation of annelids and arthropods is homologous and apomorphic for a monophyletic Articulata. Expand
Coelomata and not Ecdysozoa: evidence from genome-wide phylogenetic analysis.
TLDR
A phylogenetic analysis of over 500 sets of orthologous proteins, which are represented in plants, animals, and fungi, using maximum likelihood, maximum parsimony, and distance methods showed concordance between evolution of protein sequences and higher-level evolutionary events, such as domain fusion or gene loss. Expand
A comprehensive molecular phylogeny of tardigrades—adding genes and taxa to a poorly resolved phylum‐level phylogeny
Tardigrades constitute a phylum of miniaturized metazoans with ca. 1030 living species, a fossil record that probably dates back to the Cambrian, and physiological properties that allow them to liveExpand
The position of arthropods in the animal kingdom: Ecdysozoa, islands, trees, and the "Parsimony ratchet".
TLDR
The goal of this paper was to investigate the position of the Arthropoda within the protostome animals and determine arthropod sister-group relationships, and the phylogenetic conclusions were summarized as monophyletic. Expand
The position of the Arthropoda in the phylogenetic system
TLDR
There are morphological characters that support Articulata, but molecular as well as morphological data advocate Ecdysozoa, and comparative morphology suggests Gastrotricha as the sister group of Ecdy sozoa with the synapomorphies. Expand
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 25 REFERENCES
Molecular analysis supports a tardigrade-arthropod association
TLDR
The addition of DNA sequence data provides valuable new criteria for evaluating phyletic relationships, but should be analyzed in light of extensive morphological evidence already available. Expand
Annelida and Arthropoda are Not Sister Taxa: A Phylogenetic Analysis of Spiralian Metazoan Morphology
TLDR
This study presents a new analysis of 141 independently assembled characters, purported to represent the current state of knowledge of metazoan morphology and embryology, and results in robust support of the Eutrochozoa hypothesis. Expand
Evidence from 12S ribosomal RNA sequences that onychophorans are modified arthropods.
TLDR
Parsimony analysis suggests that onychophorans form a sister group to chelicerates and crustaceans plus hexapods, but this relationship is not well supported by monophyly testing, which conflict with current hypotheses of evolutionary pathways within arthropods. Expand
A Cladistic Analysis of Pseudocoelomate (Aschelminth) Morphology
TLDR
It is concluded that there are 2 main lines of pseudocoelomate evolution: a minor clade (Acanthocephala + Rotifera) defined principally by a syncytial epidermis, intracytoplasmic lamina, and sperms with anterior flagella, and a major clade, defined primarily by a cuticle that is molted. Expand
Deducing the pattern of arthropod phytogeny from mitochondrial DNA rearrangements
THE origins of arthropods and the phylogenetic relationships among their three major living groups (atelocerates, crustaceans and chelicerates) are vigorously contended. To help resolve this, weExpand
Bilaterians of the Precambrian-Cambrian transition and the annelid-arthropod relationship.
  • J. W. Valentine
  • Biology, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
  • 1989
TLDR
There is no evidence that Late Proterozoic invertebrates possessed a coelom suited for peristaltic burrowing, therefore, the annelidan body plan had probably not appeared, and it is not implausible, however, that coelomic spaces in the form of ducts or organ sacs were present in segmented segmented forms. Expand
USING DNA SEQUENCES TO UNRAVEL THE CAMBRIAN RADIATION OF THE ANIMAL PHYLA
TLDR
The achievements and controversies between molecular studies are reviewed and compared to corresponding studies based on morphological data, and important methodological considerations that affect the studies of phylum-level relationships are considered. Expand
The early emergence of platyhelminths is contradicted by the agreement between 18S rRNA and Hox genes data.
  • G. Balavoine
  • Biology, Medicine
  • Comptes rendus de l'Academie des sciences. Serie III, Sciences de la vie
  • 1997
TLDR
New evidence from the sequences of Hox genes suggests that the duplicated genes Ultrabithorax/abdominal-A constitute a genetic synapomorphy of the whole protostome clade, compatible with the old idea that flatworms are derived from a coelomate ancestor. Expand
Arthropod Phylogeny with Special Reference to Insects
TLDR
Elucidates the major evolutionary pathways of the Phylum Arthropoda, based on the phylogenetic method of Hennig, and focuses on discovering the derived character states that most probably had a common origin in an ancestral state. Expand
18S rRNA data indicate that Aschelminthes are polyphyletic in origin and consist of at least three distinct clades.
TLDR
Analyses of 18S rRNA sequences from six Aschelminth phyla (including four previously unpublished sequences) support polyphyly for the Aschelminthes. Expand
...
1
2
3
...