obturaculum

obturaculum
n. [L. dim. obturare, to plug or close]
(ARTHROPODA: Insecta)
In Anoplura, a connective-like tissue structure that divides the hemocoel of the head from the thoracic hemocoel; continuous posteriorly with a heavy coat surrounding the thoracic ganglia; neck-plug.

Online Dictionary of Invertebrate Zoology. . 2005.

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