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echinodermata    
n. 棘皮动物

棘皮动物

Echinodermata
n 1: radially symmetrical marine invertebrates including e.g.
starfish and sea urchins and sea cucumbers [synonym:
{Echinodermata}, {phylum Echinodermata}]

Echinodermata \E*chi`no*der"ma*ta\
([-e]*k[imac]`n[-o]*d[~e]r"m[.a]*t[.a]), n. pl. [NL., fr. Gr.
'echi^nos hedgehog, sea urchin de`rma, -atos, skin.]
(Zo["o]l.)
One of the grand divisions of the animal kingdom. By many
writers it was formerly included in the Radiata. [Written
also {Echinoderma}.]
[1913 Webster]

Note: The species usually have an exterior calcareous
skeleton, or shell, made of many pieces, and often
covered with spines, to which the name. They may be
star-shaped, cylindrical, disk-shaped, or more or less
spherical. The body consists of several similar parts
(spheromeres) repeated symmetrically around a central
axis, at one end of which the mouth is situated. They
generally have suckers for locomotion. The group
includes the following classes: Crinoidea, Asterioidea,
Ophiuroidea, Echinoidea, and Holothurioidea. See these
words in the Vocabulary, and also {Ambulacrum}.
[1913 Webster]


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  • Echinoderm - Wikipedia
    An echinoderm ( ɪˈkaɪnəˌdɜːrm, ˈɛkə - ) [2] is any animal of the phylum Echinodermata ( ɪˌkaɪnoʊˈdɜːrmətə ), which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies" [3]
  • Definition, Characteristics, Species, Facts - Britannica
    Echinoderm, any of a variety of invertebrate marine animals belonging to the phylum Echinodermata, characterized by a hard, spiny covering or skin Living species include sea lilies, sea urchins, sea cucumbers, starfishes, basket stars, and sea daisies
  • Echinoderms - Definition, Examples, Characteristics, and Habitat
    Echinoderms are spiny-skinned invertebrates of the phylum Echinodermata, specifically recognized by the pentamerous body (five-pointed) symmetry in adults The phylum derives its name from the Greek words ‘ekhînos,’ meaning ‘ hedgehog,’ and ‘dérma,’ meaning skin
  • Phylum Echinodermata- Characteristics, classification, examples
    They are exclusively marine and are among the most common and widely distributed marine animals They occur in all seas from the intertidal zones to great depths They have an organ grade system of body organization Symmetry usually radial, nearly always pentamerous
  • Phylum Echinodermata | manoa. hawaii. edu ExploringOurFluidEarth
    Echinoderms are named for the spines or bumps covering the outer surface of the bodies of many of them (Greek root word echino - meaning spiny; Latin root word - derm meaning skin) Examples of echinoderms include sea stars, sea urchins, sea cucumbers, brittle stars, and feather stars (Fig 3 83)
  • Sea Stars, Urchins, and Relatives - Smithsonian Ocean
    Together, these animals make up the Echinodermata, a word with Greek origins meaning “hedgehog skin ” Echinoderms live in every ocean, even off the coast of Antarctica
  • Phylum Echinodermata – Definition, Classification, Characteristics . . .
    Phylum Echinodermata encompasses marine organisms characterized by a calcareous endoskeleton, pentamerous radial symmetry in adulthood, and a specialized water vascular system, with notable members including starfish, sea urchins, and sea cucumbers
  • 28. 7 Phylum Echinodermata – General Biology
    Echinodermata are named after their “ prickly skin ” (from the Greek “echinos” meaning “prickly” and “dermos” meaning “skin”) This phylum is a collection of about 7,000 described living species of exclusively marine, bottom-dwelling organisms
  • Echinoderms ~ MarineBio Conservation Society
    Echinoderms are a diverse group of marine animals belonging to the phylum Echinodermata They are characterized by a unique radial symmetry and a spiny or prickly outer skin
  • Echinoderms: Classification, Habitat and Affinities
    The phylum Echinodermata constitutes a very well-defined group They exhibit dis­tinct radial symmetry in adults, excepting some Holothurians where the radial symme­try is not marked externally





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