Eusthenopteron or lobe-finned fishes have.....scales

Options :
  1. Placoid scales
  2. Cosmoid scales
  3. Elasmoid scales
  4. Leptoid scales
Answer and Explanation :-

Answer: Option 3


Elasmoid scales are thin, imbricated scales composed of a layer of dense, lamellar bone called isopedine, above which is a layer of tubercles usually composed of bone, as in Eusthenopteron.

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