Epioblasma torulosa   (Rafinesque)


 
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Green Blossom; Green Blossom Pearly Mussel
(Epioblasma torulosa ssp. gubernaculum (Reeve))

 
syn. Dysnomia torulosa ssp. gubernaculum (Reeve), Plagiola torulosa gubernaculum (Reeve), Unio gubernaculum (Reeve)

 
distribution:

USA: Anderson County, Campbell County, Claiborne County, Grainger County, Hamblen County, Hancock County, Hawkins County, Jefferson County, Knox County, Sullivan County, Union County / Tennessee; Lee County, Scott County / Virginia

 
local name:

Green Blossom (English)

 
size: (?)

extinction date: last seen in 1984

 
The Green Blossom Pearly Mussel was distributed, among others, in the Clinch River, the North Fork Holston River, the South Fork Holston River and the Powell-River in Virginia.

The last living specimen of this subspecies was seen in the year 1984 in the Clinch River in the Scott County in Virginia.

 
Tubercled Blossom; Tubercled Blossom Pearly Mussel
(Epioblasma torulosa ssp. torulosa (Rafinesque))

 
syn. Amblema torulosa (Rafinesque), Dysnomia torulosa torulosa (Rafinesque), Plagiola torulosa torulosa (Rafinesque)

 
distribution:

USA: Alabama; Illinois; Indiana; Kentucky; Ohio; Tennessee; West Virginia

 
local name:

Tubercled Blossom (English)

 
size: (?)

extinction date: (?)

 
The Tubercled Blossom Pearly Mussel is split into three subspecies, of which two are considered extinct, including the nominate race. The single still existing subspecies, the Northern Riffleshell (Epioblasma torulosa rangiana (Lea)), occurs in seveal rivers in Illinois, Indiana, Kentucky, Michigan, Ohio, Pennsylvania and West Virginia as well as in Ontario / Canada.

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The nominate race of the Tubercled Blossom Pearly Mussel was once distributed, among others, in the Elk River, the Paint Rock River and the Tennessee River in North Alabama, where it has not been found again since the Tennessee River was impounded.

Additionally it occurred in the Muskingum River, the Ohio River and the Scioto River in Ohio and obviously also in the Kanawha River in West Virginia, where one specimen was found in the year 1969.

 
left:

Tubercled Blossom Pearly Mussel (Epioblasma torulosa ssp. torulosa)


Depiction from: 'T. A. Conrad: Monography of the family Unionidae; or Naiades of Lamarck (freshwater bivalve shells) of North America. Philadelphia, J. Dobson, 1836'

http://www.biodiversitylibrary.org

 
References: