Jun
04
“Echinodermata”
![EchinodermCladogramPoster_small](http://laughingmantisstudio.com/wp-content/uploads/2010/06/EchinodermCladogramPoster_small-1024x706.jpg)
“Echinodermata”
Phylogeny of the echinoderms
A cladogram in the sand depicts the evolutionary relationships between the five classes of echinoderms: asteroidea (sea stars), ophiuroidia (brittle stars), echinoidea (sea urchins and sand dollars), holothuroidea (sea cucumbers), and crinoidea (sea lillies and feathers).