Early crinoid faunas, characterised by a range of stem lengths and arm branching patterns, have provided vital clues regarding ancient marine ecosystems and the processes of niche partitioning.

New Mexico geologist and author Magdalena Sandoval Donahue discusses the interesting geology of the Santa Fe National Forest ...

The tubular stems of crinoids and the shells of brachiopods are preserved in the rocks but could easily be missed without a sharp eye.

Researchers discovered Endoxocrinus kexuei, a new crinoid species, in the South China Sea, living on cold seep habitats over 2,700 feet deep.

The crinoid has between 20 and 22 arms that can reach up to 5.5 inches long, according to the study. The animal’s stalk is shorter than its arms, about 2.5 inches long, researchers said.

The crinoid has between 20 and 22 arms that can reach up to 5.5 inches long, according to the study. The animal’s stalk is shorter than its arms, about 2.5 inches long, researchers said.

The crinoid has between 20 and 22 arms that can reach up to 5.5 inches long, according to the study. The animal’s stalk is shorter than its arms, about 2.5 inches long, researchers said.

The crinoid has between 20 and 22 arms that can reach up to 5.5 inches long, according to the study. The animal’s stalk is shorter than its arms, about 2.5 inches long, researchers said.

The crinoid has between 20 and 22 arms that can reach up to 5.5 inches long, according to the study. The animal’s stalk is shorter than its arms, about 2.5 inches long, researchers said.

The crinoid has between 20 and 22 arms that can reach up to 5.5 inches long, according to the study. The animal’s stalk is shorter than its arms, about 2.5 inches long, researchers said.