n.primitive echinoderms having five or more feathery arms radiating from a central disk

adj.of or relating to or belonging to the class Crinoidea

Evolution and Classification of Paleozoic Crinoids
The crinoids of the Al Rose Formation (Early Ordovician, Inyo County, California, U.S.A.)
Morphological Diversification of Paleozoic Crinoids
Biostratinomy of Recent Crinoids (Echinodermata) at Lizard Island, Great Barrier Reef, Australia
A Revised Macroevolutionary History for Ordovician-Early Silurian Crinoids
Ecological Controls on the Evolutionary Recovery of Post-Paleozoic Crinoids
Phylogeny of Arenig to Caradoc crinoids (Phylum Echinodermata) and suprageneric classification of the Crinoidea
Morphological Disparity in Ordovician-Devonian Crinoids and the Early Saturation of Morphological Space
Species longevity as a function of niche breadth: Evidence from fossil crinoids
Morphological Diversity In The Evolutionary Radiation Of Paleozoic and Post-Paleozoic Crinoids