Georgia pigtoe (Pleurobema hanleyianum)

Federal Register | Recovery | Critical Habitat | Conservation Plans | Petitions | Life History

Listing Status:   

Where Listed: WHEREVER FOUND

General Information

The Georgia pigtoe (Pleurobema hanleyianum) is a freshwater mussel in the family Unionidae (Figure 1). It was described in 1852 by I. Lea as Unio hanleyianum from the Coosawattee River in Georgia. It was placed in the genus Pleurobema by Simpson in 1900. The uniqueness of the Georgia pigtoe has been verified both morphologically (Williams et al. 2008) and genetically (Campbell et al. 2008). The shell of the adult Georgia pigtoe reaches about 50 to 65 millimeters (mm) (2 to 2.5 inches (in)) in length. It is oval to elliptical and somewhat inflated. The posterior ridge is low and evenly rounded when evident. The anterior end is rounded, while the posterior margin is bluntly pointed below. Dorsal and ventral margins are curved, and the beaks rise slightly above the hinge line. The periostracum (membrane on the surface of the shell) is yellowish-tan to reddish-brown and may have concentric green rings. The beak cavity is shallow, and the shell interior is white to dull bluish-white (Parmalee and Bogan 1998, Williams et al. 2008). The Georgia pigtoe is currently known from a few isolated shoals in the Upper Conasauga River in Murray and Whitfield Counties, Georgia, and in Polk County, Tennessee (Johnson and Evans 2000, Evans 2001) (Figure 2). All recent collection sites occur within a 43-km (27-mi) reach of the river. Within this reach, the Georgia pigtoe is very rare (Johnson and Evans 2000), and no demography estimates are available

  • States/US Territories in which the Georgia pigtoe, is known to or is believed to occur:  Alabama , Georgia , Tennessee
  • US Counties in which the Georgia pigtoe, is known to or is believed to occur:  View All
 
Current Listing Status Summary
Status Date Listed Lead Region Where Listed
12/02/2010 Southeast Region (Region 4)

» Federal Register Documents

Federal Register Documents
Date Citation Page Title
11/06/2014 79 FR 65982 Endangered and Threatened Wildlife and Plants; Final Recovery Plan for Georgia Pigtoe Mussel, Interrupted Rocksnail, and Rough Hornsnail
06/29/2009 74 FR 31114 31151 Proposed Endangered Status for the Georgia Pigtoe Mussel, Interrupted Rocksnail, and Rough Hornsnail with Critical Habitat
06/13/2002 67 FR 40657 40679 Endangered and Threatened Wildlife and Plants; Review of Species That Are Candidates or Proposed for Listing as Endangered or Threatened; Annual Notice of Findings on Recycled Petitions; Annual Description of Progress on Listing Actions
12/10/2008 73 FR 75176 75244 Review of Native Species That Are Candidates for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions; Proposed Rule
07/03/2013 78 FR 40162 40163 Notice of Availability of a Technical/Agency Draft Recovery Plan for Georgia Pigtoe Mussel, Interrupted Rocksnail, and Rough Hornsnail
12/06/2007 72 FR 69034 69106 Review of Native Species That Are Candidates for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions; Proposed Rule
10/25/1999 64 FR 57535 57547 Review of Plant and Animal Taxa That Are Candidates or Proposed for Listing as Endangered or Threatened; Annual Notice of Findings on Recycled Petitions; Annual Description of Progress on Listing Actions
10/30/2001 66 FR 54808 54832 ETWP; Review of Plant and Animal Species That Are Candidates or Proposed for Listing as Endangered or Threatened,Annual Notice of Findings on Recycled Petitions, and Annual Description of Progress on Listing Actions; Proposed Rule
09/12/2006 71 FR 53756 53835 Review of Native Species That Are Candidates or Proposed for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions
05/11/2005 70 FR 24870 24934 Endangered and Threatened Wildlife and Plants; Review of Native Species That Are Candidates or Proposed for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions; Proposed Rule
02/10/2010 75 FR 6613 6616 Proposed Rule: Listing with Designation of Critical Habitat for the Georgia Pigtoe Mussel, Interrupted Rocksnail, and Rough Hornsnail; reopening of comment period, availability of draft economic analysis, amended required determinations, and announcement of public hearing.
11/02/2010 75 FR 67512 67550 Determination of Endangered Status for the Georgia Pigtoe Mussel, Interrupted Rocksnail, and Rough Hornsnail and Designation of Critical Habitat; Final Rule
05/04/2004 69 FR 24876 24904 Review of Species That Are Candidates or Proposed for Listing as Endangered or Threatened; Annual Notice of Findings on Resubmitted Petitions; Annual Description of Progress on Listing Actions

» Recovery

Current Recovery Plan(s)
Date Title Plan Action Status Plan Status
10/30/2014 Recovery Plan for Georgia pigtoe mussel (Pleurobema hanleyianum),interrupted rocksnail (Leptoxis foremani)and rough hornsnail (Pleurocera foremani) Recovery efforts in progress, but no implementation information yet to display Final
Other Recovery Documents
Date Citation Page Title Document Type
07/03/2013 78 FR 40162 40163 Notice of Availability of a Technical/Agency Draft Recovery Plan for Georgia Pigtoe Mussel, Interrupted Rocksnail, and Rough Hornsnail
  • Notice Draft Recovery Plan Availability
11/06/2014 79 FR 65982 Endangered and Threatened Wildlife and Plants; Final Recovery Plan for Georgia Pigtoe Mussel, Interrupted Rocksnail, and Rough Hornsnail
  • Notice Final Recovery Plan Availability

» Critical Habitat

Date Citation Page Title Document Type Status
11/02/2010 75 FR 67512 67550 Determination of Endangered Status for the Georgia Pigtoe Mussel, Interrupted Rocksnail, and Rough Hornsnail and Designation of Critical Habitat; Final Rule Final Rule Final designated
06/29/2009 74 FR 31114 31151 Proposed Endangered Status for the Georgia Pigtoe Mussel, Interrupted Rocksnail, and Rough Hornsnail with Critical Habitat Proposed Rule Not Required

To learn more about critical habitat please see http://ecos.fws.gov/crithab

» Conservation Plans

No conservation plans have been created for Georgia pigtoe.

» Petitions

» Life History

Movement / Home Range

The only known populations of P. hanleyianum occur in the Conasauga River, Murray and Whitfield Cos., GA, and Coosa River (Weiss bypass), Cherokee Co., AL.

» Other Resources

NatureServe Explorer Species Reports -- NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.

ITIS Reports -- ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.

FWS Digital Media Library -- The U.S. Fish and Wildlife Service's National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.