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Ecdysozoa
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Ecdysozoa () is a group of protostome animals, including Arthropoda (insects, chelicerates (including arachnids), crustaceans, and myriapods), Nematoda, and several smaller phyla. The grouping of these animal phyla into a single clade was first proposed by Eernisse et al. (1992) based on a phylogenetic analysis of 141 morphological characters of ultrastructural and embryological phenotypes. This clade, that is, a group consisting of a common ancestor and all its descendants, was formally named by Aguinaldo et al. in 1997, based mainly on phylogenetic trees constructed using 18S ribosomal RNA g
Ecdysozoa is a major group of animals that includes insects, spiders, crustaceans, worms, and related creatures, united by shared evolutionary ancestry. Scientists identified this grouping by analyzing physical characteristics and genetic similarities, and it matters because it helps us understand how different animal groups are related to each other on the tree of life.
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- taxon name
- Ecdysozoa
- taxon common name
- levilci
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~5 min read
Article
9 sectionsContents
- Etymology
- Characteristics
- Phylogeny
- Older alternative groupings
- Articulata hypothesis
- Coelomata hypothesis
- References
- Further reading
- External links
Ecdysozoa () is a group of protostome animals, including Arthropoda (insects, chelicerates (including arachnids), crustaceans, and myriapods), Nematoda, and several smaller phyla. The grouping of these animal phyla into a single clade was first proposed by Eernisse et al. (1992) based on a phylogenetic analysis of 141 morphological characters of ultrastructural and embryological phenotypes. This clade, that is, a group consisting of a common ancestor and all its descendants, was formally named by Aguinaldo et al. in 1997, based mainly on phylogenetic trees constructed using 18S ribosomal RNA genes.
A large study in 2008 by Dunn et al. strongly supported the monophyly of Ecdysozoa.