refugium

[ri-fyoo-jee-uhm]
noun, plural refugia [ri-fyoo-jee-uh] .
an area where special environmental circumstances have enabled a species or a community of species to survive after extinction in surrounding areas.

Origin:
1940–45; < Latin; see refuge

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World English Dictionary
refugium (rɪˈfjuːdʒɪəm)
 
n , pl -gia
a geographical region that has remained unaltered by a climatic change affecting surrounding regions and that therefore forms a haven for relict fauna and flora
 
[C20: Latin: refuge]

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The site is a razorback sucker and bonytail refugium.
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