Ptychobranchus greenii

Triangular Kidneyshell

FWS Focus

Overview

The triangular kidneyshell is oval to elliptical in outline, and can reach 85 mm in length (Williams et al. 2008). The shell is moderately compressed, and may be flattened ventral to the umbos. The posterior ridge is high, rounded and the posterior slope is moderately steep. The pseudocardinal teeth are heavy, and the laterals are heavy, straight to slightely curved and short. The periostracum is tawny to brown, usually without rays, but when present are thin, sparse, and usually confined to the posterior slope (Williams et al. 2008).

Scientific Name

Ptychobranchus greenii
Common Name
triangular kidneyshell
FWS Category
Clams
Kingdom

Location in Taxonomic Tree

Identification Numbers

TSN:

Geography

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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.

8 Items

Listing

Listing

Recovery Plan

Critical Habitat

Critical Habitat

Five Year Review

Five Year Review

Recovery Plan

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Listing

Nov 19, 1991

Nov 19, 1991 Listing (Endangered)
ETWP; Proposed Endangered Status for Eight Freshwater Mussels and Proposed Threatened Status for Thr…
  • Publication type: Proposed
Item 1

Listing

Mar 17, 1993

Mar 17, 1993 Listing (Endangered)
Endangered Status for Eight Freshwater Mussels and Threatened Status for Three Freshwater Mussels in…
  • Publication type: Final
Item 2

Recovery Plan

Jun 29, 1998

Jun 29, 1998 Recovery Plan (Document Availability (non-FR))
Notice a Availability of a Revised Draft Recovery Plan for the Mobile River Basin Aquatic Ecosystem…
  • Publication type: Draft
Item 3

Critical Habitat

Mar 26, 2003

Mar 26, 2003 Critical Habitat
Endangered and Threatened Wildlife and Plants; Proposed Designation of Critical Habitat for Three Th…
  • Publication type: Proposed
Item 4

Critical Habitat

Jul 1, 2004

Jul 1, 2004 Critical Habitat
Designation of Critical Habitat for Three Threatened Mussels and Eight Endangered Mussels in the Mob…
  • Publication type: Final
Item 5

Five Year Review

Jun 14, 2005

Jun 14, 2005 Five Year Review (Information Solicitation)
Initiation of 5-Year Reviews of 25 Southeastern Species
  • Publication type: Notice
Item 6

Five Year Review

Sep 23, 2014

Sep 23, 2014 Five Year Review (Information Solicitation)
5-Year Status Reviews of 27 Southeastern Species; Notice of initiation of reviews; request for infor…
  • Publication type: Notice
Item 7

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 8