Ecdysozoa
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Ecdysozoa is a group of protostome animals, including Arthropoda, Nematoda, and several smaller phyla. The grouping of these animal phyla into a single clade was first proposed by Eernisse et al. base
Ecdysozoa
Panarthropoda
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Panarthropoda is a clade comprising the greatest diversity of animal groups. It contains the extant phyla Arthropoda, Tardigrada and Onychophora, although the relationships among these remained uncert
Ecdysozoa
…but lack the main characters of the group, and are now placed elsewhere. The Arthropoda, Onychophora, and Tardigrada have been grouped together as the Panarthropoda because they are distinguished by segmented body plans. Dunn et al. in 2008 suggested that the tardigrada could be grouped along with the nematodes…
Peripatopsis lawrencei 134803788
Nervous system of a tardigrade, showing ventral nerve cord with segmented ganglia (ga1-4)
Adult priapulid 2
Carcinus maenas white background