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 Pycnogonida
 海蜘蛛亞門

 Pyc·no·gon·i·da n. pl.  Zool. A class of marine arthropods in which the body is small and thin, and the eight legs usually very long; -- called also Pantopoda.
 Note: ☞ The abdomen is rudimentary, and the triangular mouth is at the end of a tubular proboscis. Many of them live at great depths in the sea, and the largest of them measure two feet across the extended legs.
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 Pycnogonida
      n : sea spiders [syn: order Pycnogonida]