- phallotheca
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n.; pl. -thecae [Gr. phallos, penis; theke, case](ARTHROPODA: Insecta)In males, a fold or tubular extension of the phallobase partly or completely enclosing the aedeagus.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.