Hollow organ receiving and depositing the partner's sperm; often with rather complicated structure in Oligochaeta. Pl. spermathecae.

Mesenchytraeus armatus.
M. armatus 4 , spermatheca.
C. pal sph , some specific characters of C. palustris and C. sphaerotheca.

Alternative form for spermatheca : spermathecae.