The shell is small and thin, with inequally sized and asymmetric valves.
It is about 1.5 times as long as high, rounded in the front, subtruncate behind and moderately swollen in the central region.
The umbos are small and point out slightly; they are situated nearer to the anterior than the posterior end.
The dorsal margin from the umbo to the upper end of the anterior margin is slightly convex, and from the umbo to the posterior region is straight and sloping.
The lower margin is convex and evenly curved, and the surface of the upper part of the shell is striated with fine, irregular, transverse concentric markings.
The right valve measures 8.5 mm (0.33 in) in breadth and 5.5 mm (0.22 in) in height, and the right valve 8.0 mm (0.31 in) and 5.4 mm (0.21 in).
The shell is small and thin, with inequally sized and asymmetric valves. It is about 1.5 times as long as high, rounded in the front, subtruncate behind and moderately swollen in the central region. The umbos are small and point out slightly; they are situated nearer to the anterior than the posterior end. The dorsal margin from the umbo to the upper end of the anterior margin is slightly convex, and from the umbo to the posterior region is straight and sloping. The lower margin is convex and evenly curved, and the surface of the upper part of the shell is striated with fine, irregular, transverse concentric markings. The right valve measures 8.5 mm (0.33 in) in breadth and 5.5 mm (0.22 in) in height, and the right valve 8.0 mm (0.31 in) and 5.4 mm (0.21 in).
Theora mesopotamica