Which of these animals is NOT an arthropod of the class Arachnida?

While ticks, scorpions, and spiders are all arthropods belonging to the class Arachnida, centipedes are arthropods belonging to the class Chilopoda. This class is of the subphylum Myriapoda, an arthropod group that includes millipedes and other multi-legged creatures.

Asked by Rachel Bortles · Last updated 5 years ago · 3.2K views · SOURCE