I guess after familiarizing myself with over 2,000 scientific names, I’ve developed an interest in their meanings, and something of an eye for the components that make up the names. Plus, most scientific names are taken from either Latin or Greek (or combinations thereof), so I had two languages to choose meanings from.
Too bad about the Horned King Allosaurus pictures (perhaps you can take more?), but the Davy Jones Spinosaurus ones are great!

I love how you did the claw and the crustacean peg leg.

Back to the names, I’ll try giving you my opinions on which ones you should choose:

I think I’d go with
Cornutorex atralebesquestios (pronounced “Kor-noo-toh-rehks ay-tra-lee-beez-kwes-tee-ose”) for the Horned King dinosaur.
Cornutorex is similar to what you originally came up with (which I thought was pretty good, by the way

), and I think I like the sound of “rex” better than “basileus”. And I think I like the sound of
atralebesquestios better than
melanolebezeteos (pronounced “mel-ahn-oh-lee-beez-dzay-teh-ose”).
Narrowing down the name for the Davy Jones dinosaur is a little harder. Even though it’s not that interesting,
Davyjonesus (“Day-vee-jones-us”) would complement
Cornutorex, as both names would translate exactly to the respective characters’ English names, so maybe you’d prefer to go with that over
Davyjonesosaurus (“Day-vee-jones-uh-sore-us”).
As for the specific epithet (sometimes mistakenly called the “species name”, but “species” refers to the full name: the genus name or generic name AND the specific epithet or specific name), I can narrow it down to two personal favorites. I’d go with
thalassodiablos (“tha-lass-oh-dy-ah-blose”) over
thalassomoloch “tha-lass-oh-moh-lok”. And though again I have no idea how or if to translate “Dutchman” into Latin, I think
caputovoladutchmanicus (“kap-ut-oh-voh-la-
duch-man-ih-kus“) is pretty good.
You should think about doing a Skeksis one of these.

They’e already so dinosaur-like that I could really see a birdlike dinosaur or other bipedal archosaur being named after them in real life. It might be hard to come up with a very interesting scientific name, though; there’s no Latin translation of “Skeksis”, so the best you could probably do would be
Skeksis or
Skeksisosaurus. However, if you were to base it on
Struthiomimus, you could call it
Skeksismimus (“Skeksis mimic”):

a combination of the Skeksis and Ozzy/Strut!
