Snake River Physa snail (Physa natricina)

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

Listing Status:   

Where Listed: WHEREVER FOUND

General Information

The Snake River physa snail (Haitia (Physa) natricina) is a freshwater mollusk found in the middle Snake River of southern Idaho. It has an ovoid shell that is amber to brown in color, and has 3 to 3.5 whorls (curls or turns in the shell). The physa can reach a maximum length of about 6.5 millimeters. The Snake River physa is believed to have evolved in the Pliocene to Pleistocene lakes and rivers of northern Utah and southeastern Idaho. While much information exists on the family Physidae, very little is known about the biology or ecology of this species. It is believed to be confined to the Snake River, inhabiting areas of swift current on sand to boulder-sized substrate. In 1995, the Service reported the known modern range of the species to be from Grandview, Idaho (RM 487) to the Hagerman Reach of the Snake River (RM 573). More recent investigations have shown this species to occur outside of this historic range to as far downstream as Ontario, Oregon (RM 368), with another population known to occur downstream of Minidoka Dam (RM 675). While the speciesí current range is estimated to be over 300 river miles, the snail has been recorded in only 5% of over 1,000 samples collected within this area, and it has never been found in high densities. The speciesí status is uncertain within the current known range, but portions of the middle Snake River (e.g., Milner Reservoir, RM 663 to Lower Salmon Falls Reservoir, RM 572) are of questionable habitat value given current water quality and water use issues. In addition, the sampling in this reach has been limited. Very few live specimens have been recovered from reservoirs which have been extensively sampled. The recovery area for the species extends from Snake River mile 553 to Snake River mile 675. It is currently listed as an Endangered species.

  • States/US Territories in which the Snake River Physa snail, Entire is known to or is believed to occur:  Idaho
  • US Counties in which the Snake River Physa snail, Entire is known to or is believed to occur:  View All
  • USFWS Refuges in which the Snake River Physa snail, Entire is known to occur:  Minidoka National Wildlife Refuge
 
Current Listing Status Summary
Status Date Listed Lead Region Where Listed
12/14/1992 Pacific Region (Region 1) Entire

» Federal Register Documents

Federal Register Documents
Date Citation Page Title
06/30/1987 52 FR 24312 24314 Findings on Pending Petitions & Description of Progress on Listing Actions; 52 FR 24312-24314
04/25/1990 55 FR 17475 17476 ETWP; Annual Description of Progress on Listing Actions and Findings on Recycled Petitions; 55 FR 17475 17476
11/21/1991 56 FR 58664 58666 ETWP; Annual Description of Progress on Listing Actions and Findings on Recycled Petitions; 56 FR 58664 58666
01/09/1986 51 FR 996 999 Findings on Pending Petitions & Description of Progress on Listing Actions; 51 FR 996-999
01/20/1984 49 FR 2485 2488 Findings on Pending Petitions & Description of Progress on Listing Actions; 49 FR 2485-2488
12/18/1990 55 FR 51931 51936 ETWP; Proposed Endangered Status for Five Idaho Aquatic Snails; 55 FR 51931 51936
05/10/1985 50 FR 19761 19763 Findings on Pending Petitions & Description of Progress on Listing Actions; 50 FR 19761-19763
12/14/1992 57 FR 59244 59257 ETWP; Determination of Endangered or Threatened Status for Five Aquatic Snails in South Central Idaho; 57 FR 59244 59257
12/29/1988 53 FR 52746 52749 Findings on Pending Petitions & Description of Progress on Listing Actions; 53 FR 52746-52749
03/06/2012 77 FR 13248 13251 5-Year Status Reviews of 46 Species in Idaho, Oregon, Washington, Nevada, Montana, Hawaii, Guam, and the Northern Mariana Islands:Notice of initiation of reviews; request for information.
07/07/1988 53 FR 25511 25515 Findings on Pending Petitions & Description of Progress of Listing Actions; 53 FR 25511-25515

» Recovery

Current Recovery Plan(s)
Date Title Plan Action Status Plan Status
11/26/1995 Snake River Aquatic Species Recovery Plan View Implementation Progress Final
Other Recovery Documents
Date Citation Page Title Document Type
03/06/2012 77 FR 13248 13251 5-Year Status Reviews of 46 Species in Idaho, Oregon, Washington, Nevada, Montana, Hawaii, Guam, and the Northern Mariana Islands:Notice of initiation of reviews; request for information.
  • Notice 5-year Review, Initiation
Five Year Review
Date Title
05/23/2014 Snake River Physa 5-year review

» Critical Habitat

No critical habitat rules have been published for the Snake River Physa snail.

» Conservation Plans

No conservation plans have been created for Snake River Physa snail.

» Petitions

» Life History

No Life History information has been entered into this system for this species.

» 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.