Brachiopod Fossil (Rhynchonellid)
This specimen consists of two separate valves of a fossilized brachiopod. The exterior surfaces are characterized by prominent, sharp radial ribs (costae) that extend from the beak to the anterior margin. A defining feature, visible in the edge-on view, is the strongly plicate or zig-zagged commissure where the two valves meet. The fossil is composed of a light-colored, beige to tan sedimentary material, likely limestone or calcitic siltstone. Darker grey to black mineral staining is present along the ridges of the ribs, providing visual contrast. The valves are roughly fan-shaped or sub-triangular, tapering towards the hinge line. The interior surfaces show some adhering matrix and evidence of crystalline mineralization. There are no visible labels or collection markings on the specimen itself.
Rhynchonellida indet.
Rhynchonellida
25.00 g
3.20 cm
3.80 cm
2.20 cm
Good
Partially prepared; valves are separated from the matrix, though some sedimentary material remains in the crevices and on the interior surfaces.
View showing the distinctive zig-zag (plicate) commissure where the two shells meet.
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection
Fossil collection