6. Example: Simulium angustipes


On the side and ventral views of the terminalia below, we don't see very much, because too much stray light is degrading the resolution. So we first pull out the ninth segment and cut the membrane with the scalpel.

In the caudal view below we get a better idea of gonocoxites and gynostyli, and, if we know it's there, we can even distinguish the gonosternum. We see that there is only a membranous connection between the gonocoxites and internal parts and the rest. We cut this membrane, first ventrally, bend out the coxites, cut the dorsal part of the membrane, and pull out the coxites. On the right side below you see the separated 9th tergite with cerci and what Rubzov calls the tenth tergite in caudal view.

Now we can see a bit more of the gonosternum between the coxites (dorsal view on the left), and in the anterior (inside) view on the right we can already see the parameres. As the coxites don't share a sclerotised connection, they can be pulled apart. We insert a blunt pin into one of them and pull away the other one, possibly cutting the membrane and the slightly sclerotised connection of the base of the parameres with the coxites.

Now we have a much better view on the internal parts and can take a first side view of parameres and gonosternum. Again these two share only a membranous connection and can be separated.

Finally we try to get the best possible resolution by embedding.