Amblema neislerii

Fat Three-ridge

FWS Focus

Overview

The fat threeridge is a medium-sized freshwater mussel that can grow to be four inches long (10.2 centimeters). This species has a dark brown to black outer shell with seven to nine horizontal ridges and a bluish-white to light purple inner shell. The left valve of the fat threeridge has two equal-sized teeth, and the right valve has a larger and smaller tooth.

Scientific Name

Amblema neislerii
Common Name
fat three-ridge
fat threeridge
Fat threeridge (mussel)
FWS Category
Clams
Kingdom

Location in Taxonomic Tree

Identification Numbers

TSN:

Geography

Launch Interactive Map

Timeline

Explore the information available for this taxon's timeline. You can select an event on the timeline to view more information, or cycle through the content available in the carousel below.

16 Items

Listing

Listing

Listing

Listing

Listing

Listing

Listing

Recovery Plan

Recovery Plan

Critical Habitat

Five Year Review

Notice

Critical Habitat

Five Year Review

Recovery Plan

Delisting

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Listing

Jan 6, 1989

Jan 6, 1989 Listing
ETWP; Animal Notice of Review; 54 FR 554 579
  • Publication type: CNOR
Item 1

Listing

Nov 21, 1991

Nov 21, 1991 Listing
ETWP; Animal Candidate Review for Listing as Endangered or Threatened Species; 56 FR 58804 58836
  • Publication type: CNOR
Item 2

Listing

Aug 3, 1994

Aug 3, 1994 Listing (Endangered)
ETWP; Proposed Endangered Status for Five Freshwater Mussels and Proposed Threatened Status for Two…
  • Publication type: Proposed
Item 3

Listing

Nov 15, 1994

Nov 15, 1994 Listing
ETWP; Animal Candidate Review for Listing as Endangered or Threatened Species.
  • Publication type: CNOR
Item 4

Listing

Feb 28, 1996

Feb 28, 1996 Listing
ETWP; Review of Plant and Animal Taxa That Are Candidates for Listing as Endangered or Threatened S…
  • Publication type: CNOR
Item 5

Listing

Sep 19, 1997

Sep 19, 1997 Listing
Review of Plant and Animal Taxa
  • Publication type: CNOR
Item 6

Listing

Mar 16, 1998

Mar 16, 1998 Listing (Endangered)
ETWP; Determination of Endangered Status for Five Freshwater Mussels and Threatened status for Two F…
  • Publication type: Final
Item 7

Recovery Plan

Jul 17, 2003

Jul 17, 2003 Recovery Plan (Document Availability (non-FR))
Notice of Availability of an Agency Draft Recovery Plan for the Endangered Fat Threeridge (Amblema…
  • Publication type: Draft
Item 8

Recovery Plan

Oct 1, 2003

Oct 1, 2003 Recovery Plan (Document Availability (non-FR))
Availability of the Recovery Plan for the Endangered Fat Threeridge (Amblema neislerii), Shinyrayed…
  • Publication type: Final
Item 9

Critical Habitat

Jun 6, 2006

Jun 6, 2006 Critical Habitat
Endangered and Threatened Wildlife and Plants; Critical Habitat for Five Endangered and Two Threaten…
  • Publication type: Proposed
Item 10

Five Year Review

Sep 27, 2006

Sep 27, 2006 Five Year Review (Information Solicitation)
Endangered and Threatened Wildlife and Plants; 5-Year Review of 37 Southeastern Species
  • Publication type: Notice
Item 11

Notice

Jun 21, 2007

Jun 21, 2007 Notice
Designation of Critical Habitat for Five Endangered and Two Threatened Mussels in Four Northeast Gul…
  • Publication type: Comment Period Reopening
Item 12

Critical Habitat

Nov 15, 2007

Nov 15, 2007 Critical Habitat
Designation of Critical Habitat for Five Endangered and Two Threatened Mussels in Four Northeast Gul…
  • Publication type: Final
Item 13

Five Year Review

Aug 6, 2018

Aug 6, 2018 Five Year Review (Information Solicitation)
5-Year Status Reviews for 42 Southeastern Species; Notice of initiation and request for information
  • Publication type: Notice
Item 14

Recovery Plan

Aug 6, 2019

Aug 6, 2019 Recovery Plan (Document Availability (non-FR))
28 Draft Recovery Plan Revisions for 53 Species in the Southeast, Mountain-Prairie, and Pacific Sout…
  • Publication type: Draft
Item 15

Delisting

Oct 29, 2024

Oct 29, 2024 Delisting
Endangered and Threatened Wildlife and Plants; Removing Chipola Slabshell and Fat Threeridge from th…
  • Publication type: Proposed
Item 16