These animals had a medium to large shell (large being
about 3cm), it is almost equilateral, very broad, and its height almost
equals its length. It also has a polygonal outline, the ventral
margin is sub-semicircular with six definite angles, and the ears are
missing. This species is slightly different then the Neithea
texana which is more globose in shape; it also has a greater
difference in height between the low and raised ribs, and it has a more
sinuous ventral margin. This specimen was found in the Georgetown
Limestone, Austin, Texas.
This specimen is suffering from efflorescence of salts often referred to as 'Byne's disease' . It is now housed with measures to stabilize the humidity.