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.

As a kid in Iowa, I found crinoid stems. Most people pick them up when they see them; to them they’re really quite interesting. To someone like me, though, ...

The crinoid was likely from the Palaeozoic era, making it between 250 and 500 million years old. ... "Crinoids have a stem which is anchored to or resting on the seafloor, ...

Today’s photograph is for you paleo-geeks … this nice crinoid stem is from a formation I forget the name of along the western flank of the Sacramento Mountains in New Mexico. If you have some ...

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.

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.