Pikaia Enamel Pin (Pikaia gracilens) marchei Front Horn Length 85 cm

Front Horn Length 85 cm (33

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Pikaia Enamel Pin (Pikaia gracilens) marchei Front Horn Length 85 cmMeet Pikaia gracilens, the humble wormlike swimmer from the Cambrian seas (~505 million years ago) that may just be one of your oldest relatives. At about 5 cm long, it didnt look like muchjust a slender, ribbon bodied creature wriggling through the Burgess Shale ecosystem. But Pikaia had something revolutionary: a notochord, the flexible rod that would eventually evolve into a backbone. That makes this little swimmer a crucial early chapter in