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Brachiopods: Aren't they just mussels? | Skeptical Squirrel
Mississippian Bear Gulch Living Fossil Lingula and Oyster Assemblage
Cambrian Brachiopoda. Brachiopoda, Fossil. Figure 34.—Interiors of valves of Obolus and Lingula. Obolus apolUnis quenstedti Mickwitz. After Mickwitz [1896, figs. Oa-b, p. 79]. A, Ventral valve; B, dorsal valve. I. Splancimoccele.
Lingula anatina immagini e fotografie stock ad alta risoluzione - Alamy