Rhynchotrema dentatum

Kingdom: Animalia Phylum: Brachiopoda Class: Rhynchonellata Order: Rhynchonellida Family: Rhynchotrematidae Genus: Rhynchotrema (Hall, 1860) Species: Rhynchotrema dentatum (Hall, 1847) Three specimens with both the brachial and pedicle valves preserved. Medium, prominent ribs (~0.12 cm) and faint sulcus (~0.4 cm). Faint fold composed of two ribs (~0.35 cm). Rounded anterior margin and rounded/triangular posterior margin. Brachial valve is convex and pedicle valve is faintly convex but relatively flat. Smallest specimen does not appear to be Rhynchotrema dentatum, but another species. This specimen has biconvex valves but no visible sulcus or fold. Posterior margin is more triangular compared to Rhynchotrema dentatum and has a prominent beak.