Unlike older texts that often focused purely on comparative anatomy, the 7th edition introduces a . It organizes the immense diversity of invertebrates by focusing on:

Source: Baguio, M. A. S., & Just, J. (2017). The Evolution of Invertebrate Body Plans. Journal of Evolutionary Biology, 30(1), 35-54.

: A common critique is the lack of color; the book uses exclusively black-and-white diagrams , which some students find monotonous compared to more modern, glossy textbooks.

This textbook is primarily intended for: