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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]
  • Echinoderm | Definition, Characteristics, Species, Facts . . .
    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
    Currently, the phylum Echinodermata contains three extant subphylums and five extant classes, including almost 7,000 living species It is the largest marine phylum and the second-largest group of deuterostomes after the chordates
  • 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 - Zoologyverse
    Echinoderms include familiar sea creatures like starfish, sea urchins, sand dollars, brittle stars, and sea cucumbers Their evolutionary significance, ecological roles, and distinctive anatomical structures make them an essential subject in marine biology and zoology
  • Phylum Echinodermata – Definition, Classification . . .
    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





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