DescriptionScathascolex83939d.png English: Scathascolex minor from the mid-Cambrian Burgess Shale. NMNH 83939d. Image should be attributed to Smith (2015)
DescriptionScathascolex pharynx.png English: Scathascolex minor from the mid-Cambrian Burgess Shale. Proboscis of NMNH 83939d Image should be attributed