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  Partner: Elm Fork Natural Heritage Museum
 Collection: Joseph Britton Freshwater Mussel Collection
Utterbackia imbecillis, Specimen #1355

Utterbackia imbecillis, Specimen #1355

Date: August 25, 1979
Creator: Britton, Joseph; Britton, Michael; Britton, David & La Grove, M.
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; bluish-white internal coloring; green external coloring; no external sculpturing. Collected in the Nueces basin. The specimen measures between 0 - 60 mm in length and was assessed to be recently dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1356

Utterbackia imbecillis, Specimen #1356

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; bluish-white internal coloring; tan external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be relatively-recently dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1357

Utterbackia imbecillis, Specimen #1357

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; bluish-white internal coloring; green external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be relatively-recently dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1358

Utterbackia imbecillis, Specimen #1358

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; white internal coloring; tan external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1359

Utterbackia imbecillis, Specimen #1359

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including the right valve only. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; white internal coloring; dark brown external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1360

Utterbackia imbecillis, Specimen #1360

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including the left valve only. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; white internal coloring; tan external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1361

Utterbackia imbecillis, Specimen #1361

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; white internal coloring; tan external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1362

Utterbackia imbecillis, Specimen #1362

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; white internal coloring; off-white external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1363

Utterbackia imbecillis, Specimen #1363

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; white internal coloring; brown external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1364

Utterbackia imbecillis, Specimen #1364

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; white internal coloring; tan external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1365

Utterbackia imbecillis, Specimen #1365

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; white internal coloring; off-white external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1366

Utterbackia imbecillis, Specimen #1366

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; white internal coloring; olive external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1367

Utterbackia imbecillis, Specimen #1367

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including the left valve only. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; bluish-white internal coloring; olive external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1368

Utterbackia imbecillis, Specimen #1368

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including the right valve only. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; bluish-white internal coloring; olive external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1369

Utterbackia imbecillis, Specimen #1369

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an oval shape; thin shell; double looped beak sculpturing; bluish-white internal coloring; olive external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be relatively-recently dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1370

Utterbackia imbecillis, Specimen #1370

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; white internal coloring; olive external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be relatively-recently dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1371

Utterbackia imbecillis, Specimen #1371

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including the right valve only. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; white internal coloring; olive external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be relatively-recently dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1372

Utterbackia imbecillis, Specimen #1372

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; white internal coloring; tan external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1373

Utterbackia imbecillis, Specimen #1373

Date: June 9, 1977
Creator: Britton, Joseph & Hagan, J.
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; white internal coloring; tan external coloring; no external sculpturing. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1374

Utterbackia imbecillis, Specimen #1374

Date: August 10, 1979
Creator: Britton, Joseph & Britton, Michael
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; bluish-white internal coloring; green external coloring; no external sculpturing. Collected in the Nueces basin. The specimen measures between 0 - 60 mm in length and was assessed to be recently dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1375

Utterbackia imbecillis, Specimen #1375

Date: August 10, 1979
Creator: Britton, Joseph & Britton, Michael
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; white internal coloring; brown external coloring; no external sculpturing. Collected in the Nueces basin. The specimen measures between 60 - 100 mm in length and was assessed to be relatively-recently dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1376

Utterbackia imbecillis, Specimen #1376

Date: August 10, 1979
Creator: Britton, Joseph & Britton, Michael
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; bluish-white internal coloring; green external coloring; no external sculpturing. Collected in the Nueces basin. The specimen measures between 0 - 60 mm in length and was assessed to be recently dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1377

Utterbackia imbecillis, Specimen #1377

Date: August 10, 1979
Creator: Britton, Joseph & Britton, Michael
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; white internal coloring; green external coloring; no external sculpturing. Collected in the Nueces basin. The specimen measures between 60 - 100 mm in length and was assessed to be relatively-recently dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum
Utterbackia imbecillis, Specimen #1378

Utterbackia imbecillis, Specimen #1378

Date: June 20, 1971
Creator: Britton, Joseph
Description: One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; double looped beak sculpturing; bluish-white internal coloring; dark brown external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be relatively-recently dead when collected.
Contributing Partner: Elm Fork Natural Heritage Museum