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RT @YorksFossilFest: Necks are known from a Sirius Passet priapulid worm (https://t.co/OCEWxuiE4s), a Burgess Shale radiodont (https://t.co…
RT @YorksFossilFest: Necks are known from a Sirius Passet priapulid worm (https://t.co/OCEWxuiE4s), a Burgess Shale radiodont (https://t.co…
Necks are known from a Sirius Passet priapulid worm (https://t.co/OCEWxuiE4s), a Burgess Shale radiodont (https://t.co/m0pj6ND1Pb), a Chengjian hyolithid (https://t.co/IM5vr6ujdE), and some Wheeler Shale sponges (https://t.co/woV19QaI81). Phew. #Marellat
Fossil and Recent Sponges https://t.co/Gi3s3F6JId これも…