Freshwater Isopods of the Genus Lirceus from Caves and Springs of the Interior Highlands, USA, with Description of Three New Species (Isopoda: Asellidae)
Publication Date: 2023/12/01
Publication Volume: Journal of Cave and Karst Science 85 #1
DOI Link: https://doi.org/10.4311/2022LSC0113
Publication Keywords:Â Freshwater Isopods, Lirceus Genus, Interior Highlands, New Species, Asellidae Family
ABSTRACT:
Eleven species of the freshwater isopod genus Lirceus occur in the Interior Highlands, a region of the south-central United States comprised of the Ozark and Ouachita physiographic provinces. As part of research on the morphology and molecular genetics of eastern North American asellid isopods, three new species of Lirceus were discovered in the Interior Highlands. Lirceus slayorum, n. sp., is described from Greathouse Spring, Washington County, Arkansas and occurs in caves and springs associated with the Ozark Springfield Plateau. Lirceus ozarkensis, n. sp., is described from Maxey Cave, Pulaski County, Missouri and was originally identified in 1949 by Hubricht and Mackin as a subspecies of Lirceus hoppinae. In actuality, L. ozarkensis is quite distinct from L. hoppinae, and occurs allopatrically in caves and springs of the southern Ozark Salem Plateau in southern Missouri. Lirceus robisoni, n. sp., is described from Abernathy Spring, Polk County, Arkansas and is found in only a few springs in a narrow area of the Ouachita Mountains in western Arkansas. Eight other species of Lirceus occur in the Interior Highlands, most of which are confined to springs and caves. New localities are presented and the ranges of the species are established. Illustrations of the genital pleopods demonstrate a common theme across the species of the Interior Highlands, with all possessing a sperm-transfer cannula arising adjacent to a variously papillate or dentate digitiform lateral process, and nestled under a dominant broadly rounded or subtriangular apex. Within this morphological template, some of the Ozark species, like Lirceus bidentatus, are among the most anatomically bizarre in North America.
SIMPLE LANGUAGE SUMMARY:
This article is about three new species of freshwater isopods from the Lirceus genus discovered in caves and springs of the Interior Highlands in the USA. These tiny creatures live in water and have unique features. Scientists studied their shapes, sizes, and DNA to tell them apart from other species. The discoveries help us understand more about the variety of life in underwater caves and springs. These isopods are important because they can indicate the health of their water habitats, which is valuable for environmental conservation.
REFERENCES:
Arkansas Geological Survey 1937. https://www.geology.arkansas.gov/docs/pdf/water/springs-in-arkansas.pdf
Bass, D. (1994). Community structure and distribution patterns of aquatic macroinvertebrates in a tall grass prairie stream ecosystem. Proceedings of the Oklahoma Academy of Science, 74, 3-10.
Black, J. H. (1971). Cave life of Oklahoma: A preliminary study (excluding Chiroptera). Oklahoma Underground, 4(1-2), 2-53.
Faxon, W. (1889). Crustacea in Garman S. Cave animals from southwestern Missouri. Bulletin of the Museum of Comparative Zoology, 17(6), 237-239.
Fleming, R. S. (1938). The larger Crustacea of the Nashville region. Journal of the Tennessee Academy of Science, 13(4), 296-314.
Graening, G.O., Fenolio, D. B., & Slay, M. E. (2011). Cave Life of Oklahoma and Arkansas: Exploration and conservation of subterranean biodiversity. University of Oklahoma Press, Norman, 226 pages.
Graening, G.O., Slay, M. E., Fenolio, D. B., & Robison, H. W. (2007). Annotated checklist of the Isopoda (Subphylum Crustacea: Class Malacostraca) of Arkansas and Oklahoma with emphasis on subterranean habitats. Proceedings of the Oklahoma Academy of Science, 87, 1-14.
Hubricht, L., & Mackin, J. G. (1949). The freshwater isopods of the genus Lirceus (Asellota: Asellidae). American Midland Naturalist, 42(2), 334-349. Link
Hunt, C. B. (1967). Physiography of the United States. W.H. Freeman and Company, San Francisco, 480 pages.
Lefébure, T., Douady, C.J., Gouy, M., & Gibert, J. (2006). Relationship between morphological taxonomy and molecular divergence within Crustacea: proposal of a molecular threshold to help species delimitation. Molecular Phylogenetics and Evolution, 40, 435-447. Link
Lewis, J. J. (1983). Caecidotea fonticulus the first troglobitic water slater from the Ouachita Mountains (Crustacea: Isopoda: Asellidae). Proceedings of the Biological Society of Washington, 96(1), 149-153.
Lewis, J. J., Lewis, S. L., Orndorff, W., Orndorff, Z., Malard, F., Konecny-Dupré, L., Saclier, N., & Douady, C. (2023). The groundwater isopods of Virginia (Isopoda: Asellidae and Cirolanidae). Virginia Museum of Natural History Special Publication 19, 214 pages.
Mackin, J. G. (1940). A key to the Oklahoma species of the Family Asellidae. Proceedings of the Oklahoma Academy of Sciences, 20, 17-18.
Mackin, J. G., & Hubricht, L. (1938). Records of distribution of species of isopods in central and southern United States with descriptions of four new species of Mancasellus and Asellus (Asellota Asellidae). American Midland Naturalist, 19, 628-637. Link
McAllister, C. T. (2020). Abernathy Spring. Encyclopedia of Arkansas. Link
McDaniel, V. R., & Smith, K. L. (1976). Cave fauna of Arkansas: selected invertebrate taxa. Proceedings of the Arkansas Academy of Science, 30, 57-60.
Nickol, B. B. (1985). Epizootiology. In Crompton, D. W. T. & Nickol, B. B. (Eds.), Biology of the Acanthocephala. Cambridge University Press, pages 307-346.
Patrick, R. (2003). Rivers of the United States: Gulf of Mexico. John Wiley and Sons, Volume 5 Part B, 272 pages.
Pennak, R. W. (1978). Fresh-water invertebrates of the United States, second edition. John Wiley and Sons, New York, 803 pages.
Racovitza, E. G. (1920). Notes sur les Isopodes. Archives de Zoologie Expérimentale et Générale, 59(2), 28-66.
Rafinesque, C. S. (1820). Annual synopsis of new genera and species of animals plants etc. discovered in America. Annals of Nature, 1, 1-16. Link
Robison, H. W., & Smith, K. L. (1982). The endemic flora and fauna of Arkansas. Arkansas Academy of Science Proceedings, 36, 52-57.
Robison, H. W., McAllister, C., Carlton, C., & Tucker, G. (2008). The Arkansas endemic fauna: An update with additions and deletions. Journal of the Arkansas Academy of Science, 62, 84-96.
Robison, H. W., & Allen, R. T. (1995). Only in Arkansas: A study of the endemic plants and animals of the state. University of Arkansas Press, Fayetteville, 121 pages.
Schultz, T. W. (1973). Functional morphology of the oral appendages and foregut of Lirceus garmani (Crustacea: Isopoda). Transactions of the American Microscopical Society, 92, 349-3644. Link
Van Name, W. G. (1936). The American land and fresh-water isopod Crustacea. Bulletin of the American Museum of Natural History, 71, 1-535.
Wagner, G. H., & Steele, K. F. (1980). Chemistry of the spring waters of the Ouachita Mountains excluding Hot Springs Arkansas. Arkansas Water Resources Research Center, University of Arkansas, Fayetteville, Publication 69, 57 pages + appendices.
Williams, W. D. (1970). A revision of North American epigean species of Asellus. Smithsonian Contributions to Zoology, 49, 1-79. http://dx/
doi.org/10.5479/si.00810282.49
Williams, W. D. (1972). Freshwater Isopods (Asellidae) of North America. Biota of Freshwater Ecosystems Identification Manual 7, U.S. Environmental Protection Agency, 45 pages. https://dx/doi.org/10.5962/bhl.title.4017
