Butterfly

 Ellipsaria lineolata    (Rafinesque, 1820)

Butterfly


MN Status:
Threatened
Federal Status:
none
CITES:
none
USFS:
none

Group:
Mollusca
Class:
Bivalvia
Order:
Unionida
Family:
Unionidae

Habitats:

  Large Rivers


Aflexia rubranura Aflexia rubranura Aflexia rubranura

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Map Interpretation

Map Interpretation

  Synonyms

 

  Basis for Listing

 

  Shell Description

Somewhat triangular, valves thick; males are compressed, females are modestly inflated; dorsal margin curved, beaks turned forward, anterior and ventral margin evenly rounded, bluntly pointed posterior; posterior ridge sharply angled dorsally; periostracum yellow, brown in old specimens, with numerous interrupted brown rays; hinge ligament sometimes dark green. Beak sculpture: a few fine double-looped lines, usually obscure. Pseudocardinal and lateral teeth well developed, nacre white. Length: up to 5 inches. No similar species in Minnesota.

  Habitat

Found in large rivers, often in coarse substrate and flowing water. Extirpated from the Minnesota River, and uncommon to rare in the Mississippi River below St. Anthony falls. Largest remaining populations are in the lower St. Croix River, where it is locally common but rarely abundant

  Biology / Life History

 

  Conservation / Management

 

  Conservation Efforts in Minnesota

 

  References