如何理解like none elsewhere意思

Australia,an isaland continent cast adrift during the time of dinosaurs.

Isolatedfrom the rest of life on land for millions of years, theanimals cast away here are today like none elsewhere.

如何理解likenone elsewhere意思？这里的like是什么使用方法?

like 为介词，像...。 none在此=none of the animals. elsewhere为后置定语。现在澳洲的动物不同于其它地方的动物。