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A reproductive aperture or pore, especially of certain insects and worms.


(Zoology) an external pore in insects, earthworms, etc, through which the gametes are extruded


(ˈgɒn əˌpɔr, -ˌpoʊr)

an opening through which eggs or sperm are released, esp. in invertebrates.
References in periodicals archive ?
Leg 6 (not figured) rudimentary, represented by unarmed genital operculum at gonopore opening.
10 and 11) with paired short apical processes, preatrium little longer than aedeagal shaft, dorsal apodeme small in lateral view, gonopore apical on ventral surface.
I spent quite a bit of time reading the paper, " she writes, "and in doing so, I learned a few useful words, like annulate, epididymal, gonopore and nephridial.
4 mm; n = 12) and the respective gonopore opens at the apical end (Rudolph & Rivas, 1988; Hobbs, 1991; Martinez et al.
This specimen is missing the possess arising near the secondary gonopore (see characters 19 and 28 in Weirauch, 2007) that is diagnostic for all other species of Leptidolon.
The gonopore region of undissected males was conspicuous just below the styli, but the aedeagus was not visible (Figure 5).
12) irregularly rounded apically; endosoma simple with a distinct secondary gonopore and lacking a spiculum.
Gonopore processes long and spatulate with rounded tips.
From this position males move to nip at the female's gonopore similar to other poeciliids.
Having four hooks on the gonopodium may provide a means of overcoming female resistance, latching on to the gonopore and transferring sperm in a manner that facilitates effective sperm transfer.