Panarthropoda

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Panarthropoda
Temporal range: Cambrian - Recent
Velvet worm
Scientific classification
Kingdom: Animalia
Subkingdom: Eumetazoa
(unranked): Bilateria
Protostomia
Superphylum: Ecdysozoa
(unranked): Panarthropoda
Nielsen, 1997
Phyla

Arthropoda
Onychophora
Tardigrada
Lobopodia

Panarthropoda is a taxon combining the phyla Arthropoda, Tardigrada, and Onychophora.1 Dunn et al. in 2008 suggested that the tardigrades could be grouped along with the nematodes, leaving Onychophora as the sister group to the arthropods.2 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 diania, onychophorans and tardigrades only.3

References

  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:10.1098/rstb.2007.2243. PMC 2614232. PMID 18192181. 
  2. ^ 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. 
  3. ^ 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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