Integrative & Comparative Biology Vol 50 2010-11

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

Cover photos by Aldine Amiel, Eric Roettinger, & Mattias Ormestad (all of www.kahikai.org); CSLM by Aldine Amiel of the Seaver lab.