The evolution of primitive calceocrinids with four arm-bearing rays, here termed cremacrinids, has been examined for 13 species of Cremacrinus, Paracremacrinus, and Anulocrinus using numerical ...
As needlefishes (Belonidae) grow, their jaws pass through a "halfbeak" stage that resembles the adult jaw condition of the closely related family of halfbeaks (Hemiramphidae). Based on this pattern, ...
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