A primitive starfish ancestor from the Early Ordovician of Morocco reveals the origin of crown group Echinodermata
Aaron W. Hunter, Javier Ortega-Hernández
The paper describes a new Early Ordovician starfish ancestor, Cantabrigiaster fezouataensis, and uses phylogenetic analysis to clarify the origin and relationships of crown group echinoderms.
bioRxiv · Nov 9, 2017 · PreprintPaleontology