In this article we will discuss about the similarities and dissimilarities between ctenophora and cnidaria.
Similarities between Ctenophora and Cnidaria:
1. Biradial symmetry.
2. Simple organisation—lack of organ- systems.
3. Arrangement of different structures in oral-aboral axis.
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4. Presence of branched coelenteron.
5. Presence of gelatinous mesoglea.
6. Net type nervous system.
7. Presence of statocyst (sense organ).
Dissimilarities between Ctenophora and Cnidaria:
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1. Meridional comb plate.
2. Adult locomotory organ—cilia.
3. Presence of collobasts.
4. Digestive structures organised.
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5. Development mosaic and determinate type.
6. Development of muscle cells directly from mesenchyme cells. (Structures present in Cnidaria but absent in Ctenophora)
7. Cnidocytes or stinging cells.
8. Formation of colony.