Figure 5. Grades 12 and 15 in A deeper phylogeny of jumping spiders (Araneae: Salticidae)

Figure 5. Grades 12 and 15. The Ecdysozoa links nematodes, nematomorphs and arthropods to a common ancestor with the ability to shed a protective trilaminate cuticle as it grew. With panarthropods like this minute, aquatic tardigrade, we see the appearance of paired, segmental appendages.