Class Holothroidea, Class Crinoidea and Class Concentricycloidea

Relationships to other animals; echinoderm characteristics; classification up to class. Maintenance functions, regeneration, reproduction, and development in Class Holothroidea, Class Crinoidea and Class Concentricycloidea.

Miller & harley, 2016 (pp. 310-312)

Miller & harley, 2002 (pp. 248-252)