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The buccal gland of Meiacanthus nigrolineatus is situated on the dentary bone, enveloping the base of specialized canine fangs. This gland is 1.2 to 1.5 mm long, and is divided into several lobes by sheets of connective tissue. Each lobe produces secreting cells that ripen, and by holocrinic secretion empty their products in the intercellular spaces. The gland is ductless and the secretion is pressed into the wound along grooves in the fang. Fish-genera related to Meiacanthus (Petroscirtes, Dasson) do not have poison glands in the mouth cavity.
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Lev Fishelson (1974) studied this question.
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