Panarthropoda
Panarthropoda is a proposed animal clade containing the extant phyla Arthropoda, Tardigrada (water bears) and Onychophora (velvet worms). Panarthropods also include extinct marine legged worms known as lobopodians ("Lobopodia"), a paraphyletic group where the last common ancestor and basal members (stem-group) of each extant panarthropod phylum are thought to have risen. However the term "Lobopodia" is sometimes expanded to include tardigrades and onychophorans as well.
| Panarthropoda Temporal range: Molecular clock and ichnofossils indicate a possible Ediacaran origin | |
|---|---|
| Panarthropods include onychophorans such as Peripatopsis and arthropods such as polydesmid millipedes | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Clade: | ParaHoxozoa |
| Clade: | Bilateria |
| Clade: | Nephrozoa |
| (unranked): | Protostomia |
| Superphylum: | Ecdysozoa |
| (unranked): | Panarthropoda Nielsen, 1995 |
| Phyla | |
Common characteristics of the Panarthropoda include a segmented body, paired ladder-like ventral nervous system, and the presence of paired appendages correlated with body segments.
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