In males, the third pair of legs are modified to form copulatory organs.

In male ricinuleids, the third pair of legs are uniquely modified to form copulatory organs.

Species use strictly defined microhabitats and have very complex copulatory organs.

The male copulatory organ of various lower invertebrate animals is often called the cirrus.

Soft body: the right tentacle is generally modified into a copulatory organ.

Most reptiles have copulatory organs, which are usually retracted or inverted and stored inside the body.

The male coelacanth does not have distinct copulatory organs, just a cloaca.

It is hypothesized that the cloaca turns itself inside out to serve as a copulatory organ.

These include the characteristic ovipositor of many female insects and the diverse male copulatory organs.

Specialized apodemes may be developed in connection with the ovipositor and the male copulatory organs.