Ctenophora

• Tentaculata:

  • Food collection characteristic
  • Locomotion
  • 4 comb rows developed, shorter tentacles
  • Gonads
  • Long retractable tentacles, oral lobes, auricles
• Lobata:

  • Redistribution of colloblast, increase body surface area
• Cestida:

  • Increased number of feeding tentacles
  • Stretched laterally, mouth and apical sense organ are at opposite sides of midpoint
  • Ctena activity and sinuous, muscular movements of the body, short tentacles
• Platyctenida:

  • Two long tentacles, oral and aboral surfaces move towards each other in a flattened plate
  • Pharyngeal cilia and muscle contractions, lateral lobes
• Nuda:

  • No tentacles, no oral lobes, 8 comb rows are well developed
  • Muscular lips, macrocilia