@Jurassic_DX If you say Mosasaurus should be 5 stars, I will update my research records. With Mosasaurus being 5 stars, it should be the most expensive compared to the other species of marine reptiles and it should cost higher than T-Rex and Spinosaurus. The Dunkleosteus should have the same incubation costs as Nothosaurus, Shonisaurus, and Styxosaurus due to them being 2 stars.
In Jurassic Park: Operation Genesis, I start off with Dryosaurus being a 1-star species and the park can only reach 2 stars. Boosting the park's dinosaur variety will increase the park's star rating. When either 4 or 5 star species are added, the park will reach 5 stars. Due to being how popular large carnivores are, they are the most expensive to incubate. Even with Velociraptor, Triceratops, and Brachiosaurus being 5 stars; their incubation costs are lower than T-Rex and Spinosaurus. Also, the cost of incubating Velociraptor is lower than Triceratops and Brachiosaurus.
Honestly, I find Quetzalcoatlus should be cheaper than Pteranodon. Its incubation cost should be similar to Dimorphodon, Cearadactylus, and Geosternbergia due to it being a 3-star species. Jelopterus should be the cheapest as it is a 1-star species. Even if Pteranodon being a 5-star species, its incubation cost should be higher than Velociraptor but lower than T-Rex, Spinosaurus, and Mosasaurus.
I definitely think it probably would be all considering, but I also think all the species need a tuning pass on their star ratings in order to justify some of these changes, hard to do them in isolation. For instance, moving mosa to 5 stars may require making sure the other marine species remain balanced and say 2 star isn't overrepresented, I do this when it comes to the Security Ratings in my fencing thread. It's really helpful to reference and let's me visualize each creatures place in comparison to each other.
Hadn't thought about incubation times too much, but that probably is a factor as well. I could surmise the small stature of the Velociraptor is why it is quicker to incubate, but this isn't exactly consistent.
I think that a 3-star Quetz is wildly out of line with its model size, anyone that sees that would be more interested than a pteranodon. I think you should adjust other pterosaur star ratings down with Jeholpterus as your floor and Quetz as the ceiling then fill in the blanks between those ranges. I find myself thinking about my Security Ratings increasingly as it tends to correlate with what the star-ratings may be. Might make it simpler to understand all these different stats too if they can be used as a short-hand for you to know at a glance roughly what you are getting.