https://creativecommons.org/licenses/by/4.0CC BY 4.0 Creative Commons Attribution 4.0 truetrue English Representativestem-groupchordatesandcomparisonswithPikaia
4.0 truetrue English Schematic reconstruction of the anterior region of Pikaia under the new anatomical interpretation, showing the anterior appendages
4.0 truetrue English Schematic reconstruction of the anterior region of Pikaia under the new anatomical interpretation, showing the anterior appendages
org/licenses/by/4.0CC BY 4.0 Creative Commons Attribution 4.0 truetrue English Detail (H) and schematic reconstruction (I) of the anterior region of Pikaia