It was first named as Palaeacmaea solarium and described by Gustaf Lindström from Silurian of Gotland in Sweden in 1884.

The outside of the shell is smooth, only concentrically wrinkled at regular distances by larger elevated ridges, the interstices between them being finely striated by parallel lines.

Interiorly there is around the apex a narrow circle of detached muscular scars, visible on the nucleus.

[1] Gustaf Lindström have found two specimens in the red, conchiferous limestone of Sandarfve kulle.

[1] This article incorporates public domain text from reference.