Although I don't have Monsters of Legend comparing the index with Monster Coliseum adds these entries to those already mentioned. I've included their origins to distinguish why some were left out (IP issues) although it doesn't explain all of them.
Gwenthia: Iqari
Glorantha: Bolo Lizard, Demi-Bird, Dragonsnail, Gorp, Grotaron, Jack o' Bear, Karrg Beetle, Morokanth, Newtling, Scorpion Man, Slarge, Timinit, Walktapus
Myth & Legend: Stoorworm, Chonchon, Fachan
Unknown: Grampus, Headhanger
I think the Stoorworm has been renamed Wurm. I'm not sure why as the Stoorworm is from Scottish legend so should be public domain. Similarly for Chonchon (Chile) and Fachan (Scottish).
I also don't see why Ducks are considered Gloranthan IP as anthropomorphic water fowl are clearly stolen from/inspired by Howard the Duck and Donald Duck. I should note that Duck and Headhanger are listed in BRP Creatures which is the RQ3's Creatures book stripped of all Gloranthan IP.
Jim.