class Crinoidea

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Definition
  1. Noun:
    • A class of marine animals: "Class Crinoidea" is the scientific taxonomic class name for a group of echinoderms commonly known as sea lilies and feather stars. These animals are characterized by a cup-shaped body, multiple feathery arms used for filter feeding, and, in many species, a stalk for attachment to the seafloor.
Usage Examples
  • Noun:
    • The fossil record shows that Class Crinoidea was much more diverse during the Paleozoic era.
    • Marine biologists study the unique morphology of Class Crinoidea.
    • Species belonging to Class Crinoidea are found in both shallow and deep ocean environments.
Advanced Usage
  • In taxonomic hierarchy: The term is used in formal biological classification to group related organisms.
    • The phylum Echinodermata includes the well-known classes Asteroidea (starfish), Echinoidea (sea urchins), and Crinoidea.
Variants and Related Words
  • Crinoid (n): A common name for any member of the Class Crinoidea.
    • The seabed was covered with ancient crinoid fossils.
  • Crinoidea: Often used without "class" in scientific contexts to refer to the same taxonomic group.
    • The phylogeny of Crinoidea is a subject of ongoing research.
Synonyms
  • Sea lilies: Refers specifically to the stalked members of this class.
  • Feather stars: Refers to the unstalked, free-moving members of this class.
Related Phrases
  • Crinoid stem: The stalk-like structure of many crinoids.
    • The limestone was full of segmented crinoid stems.
Noun
  1. sea lilies

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