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Elliptio jayensis

(I. Lea, 1838)

Flat Spike

G4Apparently Secure Found in 1 roadless area NatureServe Explorer →
G4Apparently SecureGlobal Rank
Least concernIUCN
Identity
Unique IDELEMENT_GLOBAL.2.1066205
Element CodeIMBIV14460
Record TypeSPECIES
ClassificationSpecies
Classification StatusStandard
Name CategoryInvertebrate Animal
IUCNLeast concern
Endemicendemic to a single nation
KingdomAnimalia
PhylumMollusca
ClassBivalvia
OrderUnionoida
FamilyUnionidae
GenusElliptio
Concept Reference
Williams, J. D., A. E. Bogan, R. S. Butler, K. S. Cummings, J. T. Garner, J. L. Harris, N. A. Johnson, and G. T. Watters. 2017. A revised list of the freshwater mussels (Mollusca: Bivalvia: Unionida) of the United States and Canada. Freshwater Mollusk Biology and Conservation 20:33-58.
Taxonomic Comments
Williams et al. (2017) include E. buckleyi in E. jayensis.
Conservation Status
Review Date2007-11-01
Change Date2000-08-31
Edition Date2006-10-25
Edition AuthorsCordeiro, J. (2006); Butler [1992 edition]; Brim Box, J., and C. O'Brien (2000)
Range Extent1000-5000 square km (about 400-2000 square miles)
Number of Occurrences21 - 300
Rank Reasons
Until the taxonomy of peninsular Florida Elliptio is known it is impossible to delineate range, abundance and status. However, the only recent, comprehensive survey within this species range indicated that it was widely distributed and abundant in the Ochlockonee River system and throughout the Florida peninsula.
Range Extent Comments
Range extent is difficult to ascertain due to confusion with other peninsular Elliptio. Johnson (1972) listed the range of to include the St. Marks River system, the Suwannee River system, in peninsular Florida. It is also found in the Ochlockonee River system in Florida and Georgia.
Occurrences Comments
Lumping of occurrences in close proximity could result in a reduction of number of occurrences to fewer than 80. Number of occurrences is difficult to ascertain due to confusion with other species of Elliptio. Johnson (1972) cites specimens from the Pithlachascotee, Hillsborough, Alafia, Peace, Kissimmee, and Everglades (Istokpoga, Kissimmee, Lake Okeechobee drainages), and St. Johns River systems (St. Johns, Oklawaha, Haw Creek, Black Creek, Julingon Creek drainages). Heard (1979) includes the Hillsborough, Lake Okeechobee, Ochlockonee, St. Johns, St. Mark's and Suwannee drainages.
Threat Impact Comments
Probably typical threats with possible exception of impoundments. The Orlando area, draining into the middle St. Johns and Econlockhatchec rivers, is one of the fastest growing in the U.S., potentially putting great pressure on water and habitat quality for this and other species.
Ecology & Habitat

Description

See Johnson (1972) for non-elongate specimen description.

Diagnostic Characteristics

Thin-shelled, compressed, >2:1, L:H ratio.

Habitat

This species is found in silty sand and mud in rivers and lakes (Heard, 1979), and in sand or mud in moderate current (Johnson, 1972).

Reproduction

Unknown.
Other Nations (1)
United StatesN4
ProvinceRankNative
GeorgiaS4Yes
FloridaSNRYes
Roadless Areas (1)
Florida (1)
AreaForestAcres
Alexander Springs CreekOcala National Forest2,954
References (12)
  1. Biological Resources Division, USGS. 1997. Database of museum records of aquatic species. Compiled by J. Williams (USGS-BRD, Gainesville, FL).
  2. Butler, R. S. (USGS/BRD Florida Caribbean Science Center). 1997. Review and annotation of mussel watershed distribution maps based on fields notes from 1989-1990. Review requested by Christine O'Brien, USGS-BRD. June 1997.
  3. Freshwater Mollusk Conservation Society (FMCS). 2023. The 2023 checklist of freshwater bivalves (Mollusca: Bivalvia: Unionida) of the United States and Canada. Considered and approved by the Bivalve Names Subcommittee October 2023. Online: https://molluskconservation.org/MServices_Names-Bivalves.html
  4. Fuller, S. L. H. 1974. Chapter 8: Clams and mussels (Mollusca: Bivalvia). Pp. 215-273 in: C. W. Hart, Jr., and S. L. H. Fuller (eds.). Pollution Ecology of Freshwater Invertebrates. Academic Press, New York. 389 pp.
  5. Graf, D.L. and K.S. Cummings. 2021. A 'big data' approach to global freshwater mussel diversity (Bivalvia: Unionoida), with an updated checklist of genera and species. Journal of Molluscan Studies 87(1):1-36.
  6. Heard, W.H. 1979. Identification manual of the fresh water clams of Florida. State of Florida, Department of Environmental Regulation, Technical Series, 4(2): 1-82.
  7. Johnson, R.I. 1970a. The systematics and zoogeography of the Unionidae (Mollusca: Bivalvia) of the southern Atlantic slope region. Bulletin of the Museum of Comparative Zoology, Harvard University 140(6):263-449.
  8. Johnson, R.I. 1972a. The Unionidae (Mollusca: Bivalvia) of peninsular Florida. Bulletin of the Florida State Museum of Biological Science 16(4): 181-249.
  9. MolluscaBase eds. 2024. MolluscaBase. Accessed at https://www.molluscabase.org
  10. Turgeon, D. D., J. F. Quinn, Jr., A. E. Bogan, E. V. Coan, F. G. Hochberg, W. G. Lyons, P. M. Mikkelsen, R. J. Neves, C. F. E. Roper, G. Rosenberg, B. Roth, A. Scheltema, F. G. Thompson, M. Vecchione, and J. D. Williams. 1998. Common and scientific names of aquatic invertebrates from the United States and Canada: Mollusks. 2nd Edition. American Fisheries Society Special Publication 26, Bethesda, Maryland. 526 pp.
  11. Williams, J. D., A. E. Bogan, R. S. Butler, K. S. Cummings, J. T. Garner, J. L. Harris, N. A. Johnson, and G. T. Watters. 2017. A revised list of the freshwater mussels (Mollusca: Bivalvia: Unionida) of the United States and Canada. Freshwater Mollusk Biology and Conservation 20:33-58.
  12. Williams, J. D., M. L. Warren, Jr., K. S. Cummings, J. L. Harris, and R. J. Neves. 1993. Conservation status of freshwater mussels of the United States and Canada. Fisheries 18(9):6-22.