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“The large body size and high number of grasping spines in C. praetermissus may indicate that miniaturization and migration to a planktonic lifestyle,” the lifestyle most chaetognaths enjoy today, “were secondary,” the researchers write. Earlier forms like this one might have prowled closer to the seafloor, and been larger than their contemporaries. Obviously, more fossil specimens from the same time period could help confirm or refute that idea.
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