
A facultative stygobiont, usually lacking troglomorphies, and considered as the aquatic equivalent of a (terrestrial) troglophile. In the expanded definition relating to porous aquifers, stygophiles are divided into three categories: occasional hyporheos, essentially the larvae of aquatic insects (which require an aerial epigean stage to complete t...
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stygophile In biology, that which lives or thrives in caves or subterranean passages.
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http://www.wordinfo.info/words/index/info/view_unit/2660/
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