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; 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 a round shape; moderately 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 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.