A Twist in Time—The Evolution of Spiral Cleavage in the Light of Animal Phylogeny
Andreas Hejnol
β-catenin and Early Development in the Gastropod, Crepidula fornicata
Jonathan Q. Henry, Kimberly J. Perry, and Mark Q. Martindale
Cell Lineage and Fate Map of the Primary Somatoblast of the Polychaete Annelid Capitella teleta
Néva P. Meyer and Elaine C. Seaver