Columbia subject headings:
Paleontology--Great Britain.
Paleontology--Jurassic.
Rhynchonellidae.
Harvard subject headings:
Paleontology--Great Britain
Paleontology--Jurassic
Rhynchonellidae.
Princeton subject headings:
Brachiopoda, Fossil.
Paleontology--Great Britain.
Paleontology--Jurassic.