Tardigrades and Onychophorans
Phylum Tardigrada share some characteristics with Arthropods.
Some tardigrade characteristics are definitely NOT arthropod-like
Onychophorans shares some characteristics with annelids
Other onychophoran characteristics are arthropod-like
Some onychophoran characteristics are different from both annelids & arthropods
Home Page: http://www.cbu.edu/~seisen/
Other information: Tardigrades & Onychorans - two phyla closely related to the Arthropods