However, there are some kinds of plants and invertebrates that lived in environments so limited, or that survived such enormous odds against preservation and discovery, that they are just as rare as the rarest vertebrates.
(plants and invertebrates; lived; L:in environments so limited, or that survived such enormous odds against preservation and discovery) (they; are just; as rare as the rarest vertebrates)
plants and invertebrates they
lived are just
L:in environments so limited, or that survived such enormous odds against preservation and discovery
as rare as the rarest vertebrates