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Green gland or Malpighian tubes (Green Gland: Extinct? (No: Are they a…
Green gland or Malpighian tubes
Green Gland: Extinct?
Yes: Trilobite
No: Are they a living fossil?
Yes: Horseshoe Crab
No: Does it have a telson?
No: Are they motile?
No: Barnilcle
Yes: Crab
Yes: Crayfish
Malpighian Tubes: Antenna?
Yes: Do they have more than three segments?
No: Grasshopper
Yes: Are they scavengers or predators?
Scavengers: Millipedes
Predators: Centipedes
No: Do they drink blood?
No: Can they make a web?
No: Scorpian
Yes: Spider
Yes: Tick