Donald B. Macurda

• A new spiraculate blastoid, Pyramiblastus from the Mississippian Hampton Formation of Iowa
• Paleobiological aspects of growth and development
• Systematics of the fissiculate blastoidea
• The microstructure of the crinoid endoskeleton
• The ontogeny and taxonomy of the Mississipian blastoid genus Schizoblastus
• The skeletal morphology of the isocrinid crinoids Annacrinus wyvillethomsoni and Diplocrinus maclearanus
• The stereomic microstructure of the blastoid endoskeleton