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- broad based pelvic plate that articulates with a posteriorly directed basipterygium, similar to modern sharks. The distal end has an articulation for an...13 KB (1,304 words) - 14:06, 17 October 2023
- From basi- + pterygium. basipterygium (plural basipterygia) A cartilage at the base of the fins of some fish that develops into the metapterygium upon