Forbes Crangonyctid
Crangonyx forbesi (Hubricht & Mackin, 1940)

Taxonomy

Description

Diagnostic characters

Ecological class

Stygophile

Realm

Aquatic

Distribution

Range

Known from 62 counties across six states.

Continent

North America

Country

United States

States and provinces

Illinois, Indiana, Kentucky, Missouri, Ohio, Oklahoma

Counties

Illinois

Calhoun, Gallatin, Hardin, Jackson, Jersey, Johnson, Monroe, Pike, Randolph, St. Clair

Indiana

Dubois, Floyd, Harrison, Jefferson, Jennings, Lawrence, Monroe, Orange, Owen, Washington

Kentucky

Breckinridge, Christian, Crittenden, Edmonson, Grayson, Greenbrier, Hart, Meade

Missouri

Barry, Benton, Boone, Callaway, Camden, Carter, Christian, Crawford, Franklin, Hickory, Jasper, Jefferson, LaClede, Lincoln, Maries, Miller, Oregon, Ozark, Perry, Phelps, Pike, Pulaski, Ralls, Saline, Shannon, St. Genevieve, St. Louis, Stone, Texas, Washington, Wright

Ohio

Adams, Highland

Oklahoma

Cherokee

Conservation and management

NatureServe

G5 Secure

National ranks

United States

N5 Secure

Subnational ranks

Michigan

SNR Unranked

Indiana

S5 Secure

Kentucky

S5 Secure

Missouri

SNR Unranked

Illinois

SNR Unranked

Oklahoma

S2 Imperiled

Kansas

SNR Unranked

Ohio

SNR Unranked

Pennsylvania

SNR Unranked

Arkansas

S1 Critically Imperiled

West Virginia

SNR Unranked

State and federal status

Not listed under the U.S. Endangered Species Act

References

• Benito, J.B., Porter, M.L. & Niemiller, M.L. 2021. The mitochondrial genomes of five spring and groundwater amphipods of the family Crangonyctidae (Crustacea: Amphipoda) from eastern North America. Mitochondrial DNA Part B 6: 1662–1667. doi:10.1080/23802359.2021.1926350
• Holsinger, J.R. & Lewis, J.J. 2025. Systematics of the subterranean amphipod genus Stygobromus (Crangonyctidae): Species of the Ozarks and adjacent regions. Journal of Cave and Karst Studies 87: 34–81. doi:10.4311/2024LSC0113
• Hubricht, L. 1943. Studies in the Nearctic freshwater amphipods, III. Notes on the freshwater Amphipoda of eastern United States, with descriptions of ten new species. The American Midland Naturalist 29: 683–712. doi:10.2307/2421157
• Lewis, J.J. & Bowman, T.E. 1981. The subterranean asellids (Caecidotea) of Illinois (Crustacea: Isopoda: Asellidae). Smithsonian Contributions to Zoology 335: 1–66. doi:10.5479/si.00810282.335
• Lewis, J.J., Moss, P., Tecic, D. & Nelson, M.E. 2003. A conservation focused inventory of subterranean invertebrates of the southwestern Illinois karst. Journal of Cave and Karst Studies 65: 9–21.
• McDaniel, V.R. & Smith, K.L. 1976. Cave fauna of Arkansas: selected invertebrate taxa. Journal of the Arkansas Academy of Science 30: 57–60. https://scholarworks.uark.edu/jaas/vol30/iss1/22.
• Nicholas, G. 1960. Checklist of macroscopic troglobitic organisms of the United States. The American Midland Naturalist 64: 123–160. doi:10.2307/2422897
• Peck, S.B. & Lewis, J.J. 1978. Zoogeography and evolution of the subterranean invertebrate faunas of Illinois and southeastern Missouri. National Speleological Society Bulletin 40: 39–63.
• Webb, D.W., Taylor, S.J. & Krejca, J.K. 1993. The biological resources of Illinois caves and other subterranean environments. Illinois Natural History Survey, Champaign, Illinois, USA. 143 pp.
• Zhang, J. & Holsinger, J.R. 2003. Systematics of the freshwater amphipod genus Crangonyx (Crangonyctidae) in North America. Virginia Museum of Natural History Memior 6: 1–274.

How to cite this account

Data sources and funding are listed in the Acknowledgments.

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