From what I can think of

--Jurassics--

Spinosaurus and other creatures with its animation: Elephant

Stegosarus and other creatures with its animation: Elephant


--Aquatics--

Shonisaurus and other icthyosaurs: Dolphin

Basilosaurus and other cetaceans: Whale

Megalodon and other creatures with its animation: Lawnmower


--Glaciers--

Woolly mammoth and other elephants: Elephant

Smilodon and other creatures with its animation: Tiger

Sarkastodon and other creatures with its animation: Bear and elephant

Megaloceros and other creatures with its animation: Seal and panda

Eremotherium and Chalicotherium: Bear

Andrewsarchus and other creatures with its animation: Wolf


Can anyone else think of the sounds that were used for them?

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