Olpiidae

They occur in a wide variety of microhabitats, including litter, soil, moss, under stones or in decaying logs, and they inhabit all terrestrial ecosystems except the Polar regions.{{Cite journal |last=Romero-Ortiz |first=Catalina |first2=Flórez D. ,Eduardo |last3=and Sarmiento |first3=Carlos E. |date=2020-04-17 |title=Assessment of morphometric characters to delimit species of Apolpium Chamberlin, 1930 (Pseudoscorpiones, Olpiidae) |url=https://www.tandfonline.com/doi/full/10.1080/00222933.2020.1781273 |journal=Journal of Natural History |volume=54 |issue=15-16 |pages=1025–1043 |doi=10.1080/00222933.2020.1781273 |issn=0022-2933|url-access=subscription }}

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• Antillolpium Muchmore, 1991
• Aphelolpium Hoff, 1964
• Apolpium J. C. Chamberlin, 1930
• Austrohorus Beier, 1966
• Banksolpium Muchmore, 1986
• Beierolpium Heurtault, 1976
• Calocheiridius Beier & Turk, 1952
• Calocheirus J. C. Chamberlin, 1930
• Cardiolpium Mahnert, 1986
• Ectactolpium Beier, 1947
• Euryolpium Redikorzev, 1938
• Halominniza ahnert, 1975
• Hesperolpium J. C. Chamberlin, 1930
• Heterolpium Sivaraman, 1980
• Hoffhorus Heurtault, 1976
• Horus J. C. Chamberlin, 1930
• Indolpium Hoff, 1945
• Leptolpium Tooren, 2002
• Linnaeolpium Harvey & Leng, 2008
• Minniza E. Simon, 1881
• Nanolpium Beier, 1947
• Neopachyolpium Hoff, 1945
• Nipponogarypus Morikawa, 1955
• Novohorus Hoff, 1945
• Olpiolum Beier, 1931
• Olpium L. Koch, 1873
• Pachyolpium Beier, 1931
• Parolpium Beier, 1931
• Planctolpium Hoff, 1964
• Progarypus Beier, 1931
• Pseudohorus Beier, 1946
• Stenolpiodes Beier, 1959
• Stenolpium Beier, 1955
• Xenolpium J. C. Chamberlin, 1930

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Category:Pseudoscorpion families

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