from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Plural form of spermatheca.
Sorry, no etymologies found.
The male drops a spermatophore (a packet of sperm) that the female picks and stores in spermathecae until needed.
Two pairs of spermathecae -- spherical pouches without diverticulae -- in segments 8 and 9.
Why didn't you open the opisthosoma to show off the book lungs and spermathecae?
 Another way that Millipedes can mate is the male will leave his spermatophores on the ground uncovered and the female will then find it and store it with her spermathecae.
He will then intertwine with her and that is when he passes the spermatophores to her spermathecae.
After the sperm is transfered, it is stored in what is called the spermathecae.
The researchers analysed the females of the species and found that their spermathecae are atrophied, or shrunken, in comparison to other spiders.