A sea lily (crinoid) animal fossil. Redwall Cavern, Colorado River Mile 33.3, Marble Canyon, Grand Canyon NP, Arizona, USA.

A sea lily (crinoid) animal fossil at Redwall Cavern in Marble Canyon at River Mile 33.3, seen on day 2 of 16 days rafting 226 miles down the Colorado River in Grand Canyon National Park, Arizona, USA. Crinoids are marine animals that make up the class Crinoidea, one of the classes of the phylum Echinodermata, which also includes the starfish, brittle stars, sea urchins and sea cucumbers. Those crinoids which, in their adult form, are attached to the sea bottom by a stalk (shown here) are commonly called sea lilies, while the unstalked forms are called feather stars or comatulids, being members of the largest crinoid order, Comatulida.

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Filename: 2103SW-B0035.jpg
Copyright: © Tom Dempsey / PhotoSeek.com
Image Size: 5472x3648 / 5.4MB; http://www.photoseek.com/; PhotoBest desert nature animal sea life
Contained in galleries: 2021 Apr 3-18: rafting Grand Canyon, AZ, USA: Arizona favorites, Arizona: Grand Canyon National Park

A sea lily (crinoid) animal fossil at Redwall Cavern in Marble Canyon at River Mile 33.3, seen on day 2 of 16 days rafting 226 miles down the Colorado River in Grand Canyon National Park, Arizona, USA. Crinoids are marine animals that make up the class Crinoidea, one of the classes of the phylum Echinodermata, which also includes the starfish, brittle stars, sea urchins and sea cucumbers. Those crinoids which, in their adult form, are attached to the sea bottom by a stalk (shown here) are commonly called sea lilies, while the unstalked forms are called feather stars or comatulids, being members of the largest crinoid order, Comatulida.