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Thesaurus: tetrapneumona

A division of Arachnida including those spiders which have four lungs, or pulmonary sacs. It includes the bird spiders (Mygale) and the trapdoor spiders. See Mygale.

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  1. A division of Arachnida including those spiders which have four lungs, or pulmonary sacs. It includes the bird spiders (Mygale) and the trapdoor spiders. See Mygale.
  2. A division of Arachnida including those spiders which have fourlungs, or pulmonary sacs. It includes the bird spiders (Mygale) andthe trapdoor spiders. See Mygale.