Elliptio monroensis (I. Lea, 1843)
St. Johns Elephantear

St. Johns Elephantear collected from the St. Marys River (76 mm). Photo by staff (Georgia DNR – Wildlife Resources). Specimen courtesy of Georgia Museum of Natural History (GMNH7186).
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Federal Protection: No US federal protection

State Protection: No Georgia state protection

Global Rank: G1G2

State Rank: S1

Element Locations Tracked in Biotics: Yes

SWAP 2015 Species of Greatest Conservation Need (SGCN): No

SWAP 2025 Species of Greatest Conservation Need (SGCN): Yes

2025 SGCN Priority Tier: Highest Conservation Concern

Element Occurrences (EOs) in Georgia: 2

Habitat Summary for element in Georgia: Sand and gravel substrates in low gradient rivers.

SWAP 2025 Threat Matrix

Threat 1 Threat 2 Threat 3
General Threat Agriculture & aquaculture Climate change & severe weather None
Specific Threat None Habitat shifting & alteration None

SWAP 2025 Conservation Actions:

  • Action 1: Assess SGCN mussels and mussel communities in the St. Mary's River system
  • Action 2: Support Better Backroads Program to protect Aquatic SGCN from sedimentation
  • Action 3: Minimize impacts of urbanization on aquatic SGCN and habitats
  • Action 4: Determine taxonomic validity of potential SGCN mussels in the genus Elliptio
St. Johns Elephantear collected from Puzzle Lake, Florida (70 mm). Photo by staff (Georgia DNR – Wildlife Resources). Specimen courtesy of Georgia Museum of Natural History (GMNH7181).
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