Arthropoda includes pentastomids
Ecdysozoa
1
1
3
Annelida includes pogonophorans, echiurans, and sipunculans
2 Arthropoda includes pentastomids
3 Chaetognatha is discussed with deuterostomes
The blastula stage occurs in the development
Diploblasts
Triploblastic Bilateria
Spiral cleavage
Radial cleavage
Mouth formed from the blastopore