The other four groups of segmented animals possess in common the feature of jointed appendages and a covering of chitinous plates, and are brought together under the term arthropoda.
"Directions for Collecting and Preserving Insects"
C. V. Riley
With respect to the Phylogeny of the arthropoda, I find myself disposed to take a somewhat different view from that of Professor Haeckel.
"Critiques and Addresses"
Thomas Henry Huxley
Sub-kingdom of the arthropoda: Class, Crustacea.
"The Descent of Man and Selection in Relation to Sex, Vol. I (1st edition)"
Charles Darwin