A summary is given of families, genera, species numbers, and slate distributions of the obligate subterranean (cave and groundwater) faunas of the contiguous United States and Canada. A total of 425 aquatic and 928 terrestrial species (1353 species in all) is now known. Total genus level diversity is greatest (in descending order) in the states of Texas, Alabama, Kentucky, Tennessee and Virginia. This genus and species richness is vulnerable to a variety of land use and pollution problems.

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Journal Journal of Cave and Karst Studies
Citation
Peck, S. (1998). A summary of diversity and distribution of the obligate cave-inhabiting faunas of the United States and Canada. Journal of Cave and Karst Studies, 60(1), 18–26.