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Polyplacophora    
多板目

多板目

Polyplacophora
n 1: small class of marine mollusks comprising the chitons;
sometimes considered an order of the subclass Amphineura
[synonym: {Polyplacophora}, {class Polyplacophora}]

Isopleura \I`so*pleu"ra\, n. pl. [NL. See {Iso-}, and {Pleura}.]
(Zool.)
A subclass of Gastropoda, in which the body is symmetrical,
the right and left sides being equal.
[1913 Webster]

Note: The intestine terminates at the posterior end of the
body, and the gills and circulatory and reproductive
organs are paired. It includes the chitons
({Polyplacophora}), together with {Neomenia} and
{Ch[ae]toderma}, which are wormlike forms without a
shell.
[1913 Webster]


Placophora \Pla*coph"o*ra\ (pl[.a]*k[o^]f"[-o]*r[.a]), n. pl.
[NL., from Gr. pla`x, plako`s, tablet fe`rein to bear.]
(Zool.)
A division of gastropod Mollusca, including the chitons. The
back is covered by eight shelly plates. Called also
{Polyplacophora}. See Illust. under {Chiton}, and
{Isopleura}.
[1913 Webster]


Polyplacophora \Pol`y*pla*coph"o*ra\, n. pl. [NL. See {Poly-},
and {Placophora}.] (Zool.)
See {Placophora}.
[1913 Webster]


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  • Chiton - Wikipedia
    The Greek-derived name Polyplacophora comes from the words poly- (many), plako- (tablet), and -phoros (bearing), a reference to the chiton's eight shell plates
  • Chitons - Examples, Anatomy, Characteristics, Diet, Pictures
    Chitons are flattened, bilaterally symmetrical mollusks armored with eight calcified plates on their shell They constitute the class Polyplacophora and are hence known as polyplacophorans Sometimes, they are also called by the names sea cradles, coat-of-mail shells, suck-rocks, and loricates
  • The polyplacophora - University of California Museum of Paleontology
    Chitons are generally dioecious (have separate males and females), with sperm released by males into the water
  • ADW: Polyplacophora: INFORMATION
    Poly­pla­cophorans are well suited for life in the fringe of the ocean where there are the com­bined dan­gers of beat­ing waves and ex­po­sure to the at­mos­phere A chi­ton is flat­tened and elon­gated, and can ad­here tightly to hard sub­strata with its strong foot
  • Polyplacophora - an overview | ScienceDirect Topics
    Chiton is defined as a marine mollusk belonging to the phylum Mollusca and class Polyplacophora, characterized by its ability to produce teeth for grinding rocky substrates to extract algae, utilizing a radula composed of multiple rows of teeth
  • WoRMS - World Register of Marine Species - Polyplacophora
    A natural arrangement of Mollusca, according to their internal structure London Medical Repository 15 (87): 229–239 , available online at https: archive org details s0id11783780 page 229 mode 1up MolluscaBase eds (2025) MolluscaBase Polyplacophora
  • Chiton | Marine, Polyplacophora, Shell | Britannica
    Chiton, any of numerous flattened, bilaterally symmetrical marine mollusks, worldwide in distribution but most abundant in warm regions The approximately 600 species are usually placed in the class Placophora, Polyplacophora, or Loricata (phylum Mollusca) Chitons are usually oval in shape On the
  • Class Polyplacophora (Chitons) Information | Earth Life
    Polyplacophorans are a class of the phylum Mollusca and are commonly known as Chitons They are easily distinguishable from the superficially similar Limpets (which are part of the Gastropoda) by the fact that their shell is composed of eight separate plates, rather than being just one piece
  • Class Polyplacophora - SeaNet
    Phylum Mollusca, Class Polyplacophora, Order Chitonida, Family Mopaliidae Broadly oval 6 cm long with wide spiny girdle; highly variable in color: green with red, orange, blue or white markings
  • Chitons (Polyplacophora) - Molluscs
    There are about 1,000 species of this old Mollusc class known today The largest species is the American Cryptochiton stelleri, 33 cm in size, from the American northwestern coast





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