| Panarthropoda | ||||||||||||||
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Panarthropoda is a taxon[1] combining the phyla Arthropoda, Tardigrada and Onychophora.[2] Dunn et al. in 2008 suggested that the tardigrada could be grouped along with the nematodes, leaving Onychophora as the sister group to the arthropods.[3] Originally, they were considered to be closely related to the annelids, grouped together as the Articulata, but newer studies place them among a group called the Ecdysozoa.
Common characteristics of the Panarthropoda include the presence of legs and claws, a ventral nervous system, and a segmented body.
The term "Lobopoda" is sometimes used to describe onychophorans and tardigrades only.[4]
References
- ^ Claus Nielsen (1997). Animal Evolution: Interrelationships of the Living Phyla. Oxford University Press. ISBN 0-19-850682-1.
- ^ 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:. PMID 18192181. PMC: 2614232. http://rstb.royalsocietypublishing.org/cgi/pmidlookup?view=long&pmid=18192181.
- ^ Dunn et al. (2008). "Broad phylogenomic sampling improves resolution of the animal tree of life". Nature 452: 745–749. doi:. http://www.nature.com/nature/journal/v452/n7188/abs/nature06614.html.
- ^ Cavalier-Smith T (August 1998). "A revised six-kingdom system of life". Biol Rev Camb Philos Soc 73 (3): 203–66. PMID 9809012. http://www3.interscience.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=1464-7931&date=1998&volume=73&issue=3&spage=203.
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