Linked from
The 10 pages that link to Spermatophore, each with the reason it gives.
SalamanderRelated: Many salamanders fertilize eggs after females take up a male's spermatophore.
PleopodRelated: Modified male pleopods may transfer or position spermatophores.
MillipedeRelated: Some millipedes transfer sperm indirectly in a packet during mating.
RicinuleiRelated: Male ricinuleans transfer sperm using a spermatophore and specialized appendages.
SchizomidaRelated: Male schizomids transfer sperm in a spermatophore during reproduction.