Keywords: Selkirkia columbia ROM63131.jpg en Selkirkia columbia photographed dry under cross-polarized light Colour-balancing performed; original high-resolution file at doi 10 5061/dryad km109 http //dx doi org/10 5061/dryad km109 Martin R Smith 2013-04-29 Please credit original source Smith M R Harvey T H P Butterfield N J 2015 The macro- and microfossil record of the middle Cambrian priapulid Ottoia Palaeontology doi 10 1111/pala 12168 Smith M R Harvey T H P Butterfield N J 2015 Data from The macro- and microfossil record of the middle Cambrian priapulid Ottoia Dryad Digit Repos doi 10 5061/dryad km109 cc-zero Burgess Shale Priapulida Priapulida fossils Cambrian life Cc-zero |