— MegatheriumSociety.org is a VIEWER-PARTICIPANT WEBSITE.Click on the link for information on what that means. Arthropoda (ahr-THROPP-uh-duh): zool. taxon. — a phylum of animals first described by Pierre André Latreille [November 20, 1762 – February 6, 1833], a French zoologist, in 1829, using two Gr. roots: αρθρον “arthron” = jointed, + ποδ “pod” = foot: in reference to ...