horseshoe crab

(redirected from Book gill)
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Related to Book gill: pedicel, Malpighian tubules
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Synonyms for horseshoe crab

large marine arthropod of the Atlantic coast of North America having a domed carapace that is shaped like a horseshoe and a stiff pointed tail

References in periodicals archive ?
Close examination of the second current, previously described as the respiratory current (1), shows that when the book gills are active, the lateral slits entrain dye ventrally and dorsally.