One preserved mussel specimen including the right valve only. The specimen exhibits a rhomboidal shape; thick shell; pink internal coloring; dark brown external coloring; no external sculpturing. Collected in the Colorado basin. The specimen measures over 120 mm in length and was assessed to be relatively-recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits a rhomboidal shape; thick shell; pink internal coloring; reddish-brown external coloring; no external sculpturing. Collected in the Colorado basin. The specimen measures over 120 mm in length and was assessed to be relatively-recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits a rhomboidal shape; thick shell; pink internal coloring; reddish-brown external coloring; no external sculpturing. Collected in the Colorado basin. The specimen measures between 100 - 120 mm in length and was assessed to be relatively-recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; moderately thick shell; white internal coloring; tan external coloring; no external sculpturing. Collected in the Colorado basin. The specimen measures between 100 - 120 mm in length and was assessed to be long dead when collected.

One preserved mussel specimen including the right valve only. The specimen exhibits a quadrate shape; thick shell; single looped beak sculpturing; white internal coloring; external sculpturing in the form of ridges. Collected in the Colorado basin. The specimen measures between 60 - 100 mm in length and was assessed to be subfossil when collected.

One preserved mussel specimen including the right valve only. The specimen exhibits a quadrate shape; thick shell; single looped beak sculpturing; white internal coloring; external sculpturing in the form of ridges. Collected in the Colorado basin. The specimen measures between 60 - 100 mm in length and was assessed to be subfossil when collected.

One preserved mussel specimen including the right valve only. The specimen exhibits an elliptical shape; moderately thick shell; white internal coloring; no external sculpturing. Collected in the Colorado basin. The specimen measures between 0 - 60 mm in length and was assessed to be very-long dead when collected.

One preserved mussel specimen including the right valve only. The specimen exhibits an elliptical shape; thick shell; white internal coloring; tan external coloring; no external sculpturing. Collected in the Colorado basin. The specimen measures between 60 - 100 mm in length and was assessed to be long dead when collected.

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; tan external coloring; no external sculpturing. Collected in the Colorado basin. The specimen measures between 0 - 60 mm in length and was assessed to be long dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; moderately thick shell; white internal coloring; tan external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 60 - 100 mm in length and was assessed to be recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thick shell; purple internal coloring; dark brown external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 100 - 120 mm in length and was assessed to be relatively-recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits a round shape; moderately thick shell; white internal coloring; brown external coloring; external sculpturing in the form of pustules. Collected in the Trinity basin. The specimen measures between 60 - 100 mm in length and was assessed to be very-recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits a quadrate shape; thick shell; single looped beak sculpturing; white internal coloring; tan external coloring; external sculpturing in the form of ridges. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be recently dead when collected.

One preserved mussel specimen including the left valve only. The specimen exhibits a rhomboidal shape; moderately thick shell; white internal coloring; tan external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 0 - 60 mm in length and was assessed to be recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; moderately thick shell; white internal coloring; off-white external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 60 - 100 mm in length and was assessed to be recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; moderately thick shell; white internal coloring; yellow 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.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; moderately thick shell; white internal coloring; brown external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 60 - 100 mm in length and was assessed to be relatively-recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; moderately thick shell; white internal coloring; tan external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 100 - 120 mm in length and was assessed to be relatively-recently dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an oval shape; thin shell; double looped beak sculpturing; white internal coloring; tan external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 100 - 120 mm in length and was assessed to be long dead when collected.

One preserved mussel specimen including the right valve only. The specimen exhibits an elliptical shape; thin shell; white internal coloring; brown external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 100 - 120 mm in length and was assessed to be long dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an elliptical shape; thin shell; white internal coloring; brown external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 100 - 120 mm in length and was assessed to be long dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits an oval shape; thick shell; white internal coloring; dark brown external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures over 120 mm in length and was assessed to be very-long dead when collected.

One preserved mussel specimen including the right valve only. The specimen exhibits a rhomboidal shape; thick shell; purple internal coloring; black external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures over 120 mm in length and was assessed to be very-long dead when collected.

One preserved mussel specimen including both the left and right valves. The specimen exhibits a rhomboidal shape; thick shell; white internal coloring; dark brown external coloring; no external sculpturing. Collected in the Trinity basin. The specimen measures between 60 - 100 mm in length and was assessed to be long dead when collected.