Our Hoosier State beneath us: Paleontology: The starfish family: Stelleroidea  Stelleroidea are stemless echinoderms that have a central disc from which five or more arms radiate. It includes the true starfish (Asteroidea the brittle or serpent stars (Ophiuroidea and the somasters (Somasteroidea They appeared in Ordovician seas more than 450...

Natural Perspective: Starfish (Class: Asteroidea)  Starfish are the most popular creatures there especially among the younger crowd. Tide pool excursions are a wonderful experience: the sound of surf accompanied by the refreshing sea breeze are reason enough to go. But the diversity of creatures living...

Madreporite Nexus  This page provides a gateway to pages on a few of my interests. Why Madreporite Nexus? The madreporite (not shown on the starfish below is the only assymetrical external feature of the starfish (it looks like a differently-colored spot, just...

The Ophiuroidea  Ophiuroids are a large group (over 1600 species) of echinoderms that includes the brittle stars (Ophiurida) and basket stars (Euryalida The more familiar Ophiurida, or brittle stars, usually have five arms and superficially resemble true starfish (Asteroidea However, brittle stars...

Creature Data  If you look at the shape of this star you shaould have no trouble identifying it. It has short fat arms, no spines and an opening top dead center. Colours can vary drastically from bright orange with no markings to...

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