They seem to have mechanisms that favour fertilization by allosperm (donated by a partner) over autosperm (produced endogenously).
Source: wiktionary
Allosperm
Synonyms for "allosperm"
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Sample sentences
4 total sentences available.
The latter have a well-defined allosperm storage organ, called spermatheca, attached to their fertilization pouch (Baur, this book).
Source: wiktionary
This is consistent with theory that predicts a preference for the female mating role after periods of sexual isolation because of allosperm depletion.
Source: wiktionary
During copulation, the penis deposits the autosperm (which now become allosperm) into the vaginal channel of the distal hermaphroditic duct of another animal. The allosperm then travel to the spermatotheca.
Source: wiktionary
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.