- basiperiphallus
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n.; pl. -li [Gr. basis, base; peri, around; phallos, penis](ARTHROPODA: Insecta)In Protura, the basal ring of the periphallus, into which the acroperiphallus is sometimes retracted.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.