Web Oficial de la Red Iberoamericana de Equinodermos
The Echinoid Directory
The Echinoderms of Panama
Echinodermata: Systematics
Beche-de-mer Information Bulletins – SPC
The World Ophiuroidea Database
The World Echinoidea Database
The World Asteroidea Database
EchinoBase
Echinoderm Tree of Life
The Echinoderm Files
The Echinoblog
The Long-spined urchin
Folklore of fossil Echinoderms
Systema Aspidochirotidae
Charles Messing’s Crinoid pages