As a big fan of How to Train Your Dragon, I have come up with scientific names for each of the dragon species seen so far. Much of them are subspecies of dragons from the Dragonology book series (if you don't have any titles, I recommend getting one, they're pretty informative). Here are the Latin names, organized by each of the eight classes.
Stoker Class
◾Terrible Terror (Draco parvulus magnus)
◾Monstrous Nightmare (Draco occidentalis rex)
◾Typhoomerang (Draco occidentalis australius)
◾Fireworm (Draco decapodus)
◾Red Death (Draco giganticus)
◾Snafflefang (Draco pyrodontus)
Boulder Class
◾Gronckle (Draco horridus)
◾Whispering Death (Draco vulgarus)
◾Screaming Death (D. vulgarus albinius)
◾Hotburple (D. horridus gastropyros)
Fear Class
◾Hideous Zippleback (Draco hydra dicephalus)
◾Snaptrapper (Draco hydra floralis)
Sharp Class
◾Deadly Nadder (Draco spinosis) (Also in the Tracker Class)
◾Timberjack (Draco occidentalis arborius)
◾Speed Stinger (Draco velocitus)
◾Stormcutter (Draco quatroptera)
◾Raincutter (Draco marinicus spinosis)
Tidal Class
◾Scauldron (Draco marinicus)
◾Thunderdrum (Draco oceanicus)
◾Seashocker (Draco hydra aquaticus)
◾Bewilderbeast (Draco giganticus glacies)
Mystery Class
◾Changewing (Draco chameleo)
◾Boneknapper (Draco osseus)
◾Smothering Smokebreath (Draco spectrus)
◾Hideous Zippleback (See Fear Class)
◾Flightmare (Draco luminous)
◾Snaptrapper (See Fear Class)
Strike Class
◾Skrill (Draco electrocuris)
◾Night Fury (Draco nocturnius)
Tracker Class
◾Rumblehorn (Draco triceros)
◾Deadly Nadder (See Sharp Class)
Unclassified
◾Grapple Grounder (Draco troglodytes horribilus)
What do you think? This is only my first thread, so please no bad comments! It will be updated in future with more names as new dragons are revealed.