Cyphopod

Cyphopods, also known as vulvae, are paired sacs in female millipedes that located on the underside of the third body segment that store sperm and connect to the oviduct.

[1] Cyphopods are sclerotized, and usually hidden behind a small opening.

Despite the connotation of the suffix -pod (generally referring to legs or feet), cyphopods are not derived from walking legs.

[2] This myriapoda-related article is a stub.

You can help Wikipedia by expanding it.This animal anatomy–related article is a stub.

Location of cyphopods (highlighted) in Ommatoiulus avatar
Cyphopd pair (left) and closeup of a single (right) in Eviulisoma