The humerus and femur of " Acanthostega " also contain evidence of greater development of the appendicular muscles compared to more aquatic tetrapods, hinting at the presence of digits.
2.
The humerus and femur of " Acanthostega " contain evidence of greater development of the appendicular muscles compared to more aquatic tetrapods . " Acanthostega " has a total lack of dermal fin rays and displays the presence of two or more spool-shaped bones or cartilages articulating individually in antero-posterial sets on the distal end of its limbs.
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