Answer:
NO, I do not recall any vertebrates with external reproductive organs on their dorsal surface.
Explanation:
Usually the urogenital systems in vertebrate includes a combination of reproductive and excretory tissues. And it is a very common feature in vertebrates.
Disadvantages:
- Urine would flow over the body surface if the external reproductive organs on their dorsal surface.
- They are more prone to be damaged by the environment. as the ventral surface provides more protection.
Advantage:
- Higher coverage: Posterior placement provides this advantage due to back to back mating.
